JAVA编写的计算器源代码

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java计算机源代码

java计算机源代码

import java.awt.*;import java.awt.event.*;import javax.swing.*;public class JiSuanQi extends JFrame implements ActionListener { private JPanel jp1, jp2, jp3, jp4;private JTextField shuru;private JButton n1, n2, n3, n4, n5, n6, n7, n8, n9, n0;private JButton jia, jian, cheng, chu, dian, deng;private JButton sqrt, pingfang, daoshu, baifenhao;private JButton qingchu, guiling, a, zhengfu;private boolean jiaf, jianf, chengf, chuf, end;private double num1, num2;Color c1 = Color.blue;Color c2 = Color.red;public JiSuanQi() {super("计算器-程鹏");n1 = new JButton("1");n1.setForeground(c1);n2 = new JButton("2");n2.setForeground(c1);n3 = new JButton("3");n3.setForeground(c1);n4 = new JButton("4");n4.setForeground(c1);n5 = new JButton("5");n5.setForeground(c1);n6 = new JButton("6");n6.setForeground(c1);n7 = new JButton("7");n7.setForeground(c1);n8 = new JButton("8");n8.setForeground(c1);n9 = new JButton("9");n9.setForeground(c1);n0 = new JButton("0");n0.setForeground(c1);jia = new JButton("+");jia.setForeground(c2);jian = new JButton("-");jian.setForeground(c2);cheng = new JButton("×");cheng.setForeground(c2);chu = new JButton("÷");chu.setForeground(c2);dian = new JButton(".");dian.setForeground(c2);deng = new JButton("=");deng.setForeground(c2);sqrt = new JButton("√");sqrt.setForeground(c2);pingfang = new JButton("x²");pingfang.setForeground(c2);daoshu = new JButton("1/x");daoshu.setForeground(c2);baifenhao = new JButton("%");baifenhao.setForeground(c2);a = new JButton();zhengfu = new JButton("±");a.setEnabled(false);qingchu = new JButton("Back");qingchu.setForeground(c2);guiling = new JButton("CE");guiling.setForeground(c2);shuru = new JTextField("0", 24);shuru.setHorizontalAlignment(JTextField.RIGHT); shuru.setEnabled(false);jp1 = new JPanel();jp1.setBackground(Color.LIGHT_GRAY);jp1.add(shuru);jp2 = new JPanel(null);jp2.setLayout(new GridLayout(4, 5, 10, 10));jp2.setBackground(Color.LIGHT_GRAY);jp2.add(n7);jp2.add(n8);jp2.add(n9);jp2.add(jia);jp2.add(sqrt);jp2.add(n4);jp2.add(n5);jp2.add(n6);jp2.add(jian);jp2.add(daoshu);jp2.add(n1);jp2.add(n2);jp2.add(n3);jp2.add(cheng);jp2.add(pingfang);jp2.add(dian);jp2.add(n0);jp2.add(deng);jp2.add(chu);jp2.add(baifenhao);n1.addActionListener(this);n2.addActionListener(this);n3.addActionListener(this);n4.addActionListener(this);n5.addActionListener(this);n6.addActionListener(this);n7.addActionListener(this);n8.addActionListener(this);n9.addActionListener(this);n0.addActionListener(this);jia.addActionListener(this);jian.addActionListener(this);cheng.addActionListener(this);chu.addActionListener(this);dian.addActionListener(this);deng.addActionListener(this);qingchu.addActionListener(this);guiling.addActionListener(this);shuru.addActionListener(this);sqrt.addActionListener(this);pingfang.addActionListener(this);daoshu.addActionListener(this);baifenhao.addActionListener(this);zhengfu.addActionListener(this);jp3 = new JPanel(new GridLayout(1, 4, 10, 20));jp3.setBackground(Color.LIGHT_GRAY);jp3.add(a);jp3.add(zhengfu);jp3.add(qingchu);jp3.add(guiling);jp4 = new JPanel(null);jp4.setLayout(new GridLayout(2, 1, 10, 40));jp4.setBackground(Color.LIGHT_GRAY);jp4.add(jp1);jp4.add(jp3);BorderLayout br = new BorderLayout(0, 20);this.setLayout(br);add(jp4, BorderLayout.NORTH);add(jp2, BorderLayout.CENTER);setResizable(true);setSize(330, 370);setLocation(500, 300);setVisible(true);}public void number(int i) {if (end) {shuru.setText("0");end = false;}String s;if (shuru.getText().trim().indexOf(".") != -1) {dian.setEnabled(false);} else {dian.setEnabled(true);}if (shuru.getText().equals("0") || shuru.getText().equals("+") || shuru.getText().equals("-") || shuru.getText().equals("×")|| shuru.getText().equals("÷")) {shuru.setText("");}s = String.valueOf(i);shuru.setText(shuru.getText() + s);}public void houtui(String s) {int n;n = s.length();shuru.setText(s.substring(0, n - 1));}public void yunsuan() {if (jiaf) {num1 = num1 + num2;} else if (chengf) {num1 = num1 * num2;} else if (chuf) {num1 = num1 / num2;} else if (jianf) {num1 = num1 - num2;} else {num1 = num2;}}public void clearPoint(double b) {String st = String.valueOf(b);if (st.endsWith(".0")) {int n = st.length();st = st.substring(0, n - 2);}shuru.setText(st);}public void actionPerformed(ActionEvent e) { String s = e.getActionCommand();if (s.equals("1")) {number(1);} else if (s.equals("2")) {number(2);} else if (s.equals("3")) {number(3);} else if (s.equals("4")) {number(4);} else if (s.equals("5")) {number(5);} else if (s.equals("6")) {number(6);} else if (s.equals("7")) {number(7);} else if (s.equals("8")) {number(8);} else if (s.equals("9")) {number(9);} else if (s.equals("0")) {number(0);} else if (s.equals("CE")) {shuru.setText("0");} else if (s.equals("Back")) {houtui(shuru.getText());} else if (s.equals("+")) {num1 = Double.parseDouble(shuru.getText());shuru.setText("+");jiaf = true;jianf = false;chengf = false;chuf = false;} else if (s.equals("-")) {num1 = Double.parseDouble(shuru.getText());shuru.setText("-");jianf = true;jiaf = false;chengf = false;chuf = false;} else if (s.equals("×")) {num1 = Double.parseDouble(shuru.getText());shuru.setText("×");chengf = true;jiaf = false;jianf = false;chuf = false;} else if (s.equals("÷")) {num1 = Double.parseDouble(shuru.getText());shuru.setText("÷");chuf = true;jiaf = false;jianf = false;chengf = false;} else if (s.equals("=")) {num2 = Double.parseDouble(shuru.getText());yunsuan();clearPoint(num1);chuf = false;jiaf = false;jianf = false;chengf = false;end = true;} else if (s.equals(".")) {String st;st = shuru.getText() + ".";shuru.setText(st);} else if (s.equals("√")) {num1 = Double.parseDouble(shuru.getText());double b = Math.sqrt(num1);clearPoint(b);end = true;} else if (s.equals("x²")) {num1 = Double.parseDouble(shuru.getText());double b = Math.pow(num1, 2);clearPoint(b);end = true;} else if (s.equals("1/x")) {num1 = Double.parseDouble(shuru.getText());double b = 1 / num1;clearPoint(b);end = true;} else if (s.equals("%")) {num1 = Double.parseDouble(shuru.getText());double b = num1 / 100;clearPoint(b);end = true;} else if (s.equals("±")) {double m= Double.parseDouble(shuru.getText());if (String.valueOf(m).equals("0")) {shuru.setText("");}String st=("" +(-m));m=Double.parseDouble(st);clearPoint(m);}}public static void main(String[] args) {JiSuanQi jsq = new JiSuanQi();}}。

JAVA简易计算器程序源代码

JAVA简易计算器程序源代码

JAVA简易计算器程序源代码package myText;import java.awt.*;import javax.swing.*;import java.awt.event.*;import javax.swing.border.*;public class Calculator extends JFrame implements ActionListener{ private JPanel Panel1=new JPanel();private JPanel Panel2=new JPanel();private JTextField tfResult=new JTextField(25);private JLabel label=new JLabel("计算结果:");private String recentOperation=null;private String recentNum=null;private boolean isNew=true;public void addButton(Container c,String s){JButton b=new JButton(s);b.setFont(new java.awt.Font("SansSerif",0,12));b.setForeground(Color.red);b.setBorder(BorderFactory.createRaisedBevelBorder());c.add(b);b.addActionListener(this);}//end public void addButton(Container c,String s)public void actionPerformed(ActionEvent e){String s=e.getActionCommand();if(s.charAt(0)>='0'&&s.charAt(0)<='9'){if(!isNew){tfResult.setText(tfResult.getText()+s);}//end if(!isNew)else{tfResult.setText(s);}//end elseisNew=false;}//end if(s.charAt(0)>='0'&&s.charAt(0)<='9') else if(s.equals(".")){if(tfResult.getText().indexOf(".")!=-1)return;if(!isNew&&tfResult.getText()!=""){tfResult.setText(tfResult.getText()+".");}//end ifelse{tfResult.setText("0.");}//end elseisNew=false;}//end if(s.equals("."))else if(s.equals("=")){equalaction(e);}//end if(s.equals("="))else{if((tfResult.getText()).equals("")){return;}//endif((tfResult.getText()).equals(""))if(recentOperation!=null){equalaction(e);}//end if(recentOperation!=null) recentOperation=s;recentNum=tfResult.getText();isNew=true;}//end else}//end public void actionPerformed(ActionEvent e) void equalaction(ActionEvent e){if(recentOperation==null||recentNum==null||tfResult.getTex t().equals("")){ return;}//end if()double last=0,now=0;try{last=Double.parseDouble(recentNum);now=Double.parseDouble(tfResult.getText());}//end trycatch(NumberFormatException ne){recentOperation=null;recentNum=null;tfResult.setText("数据输入不合法");System.out.println("数据输入不合法");isNew=true;return;}//end catch(NumberFormatException ne)if(recentOperation.equals("+")){last+=now;}//end if(recentOperation.equals("+"))if(recentOperation.equals("-")){last-=now;}//endif(recentOperation.equals("-"))if(recentOperation.equals("*")){last*=now;}//endif(recentOperation.equals("*"))if(recentOperation.equals("/")){last/=now;}//endif(recentOperation.equals("/"))tfResult.setText(""+last);recentNum=tfResult.getText();recentOperation=null;isNew=true;}//end void equalaction(ActionEvent e)public Calculator(){tfResult.setBorder(BorderFactory.createLoweredBevelBorder ());tfResult.setEditable(false);tfResult.setText("0");tfResult.setHorizontalAlignment(SwingConstants.RIGHT);////本java源代码由839682048整理修改//////Panel1.add(label,FlowLayout.LEFT);Panel1.add(tfResult);////本java源代码由839682048整理修改///Panel2.setLayout(new GridLayout(4,4,2,2));String buttons="789/456*123-0.=+";for(int i=0;i<buttons.length();i++){< p="">addButton(Panel2,buttons.substring(i,i+1));}//end for()//本java源代码由839682048整理修改///this.getContentPane().add(Panel1,"North");this.getContentPane().add(Panel2,"Center");this.setResizable(false);this.setTitle("计算器");this.addWindowListener(newjava.awt.event.WindowAdapter(){public void windowClosing(WindowEvent e){System.exit(0);}});}//end public Calculator1()public static void main(String[]args){Calculator mf=new Calculator();mf.setBounds(200,200,400,400);mf.show();}//end main()}//end public class Calculator1extends JFrame implements ActionListener</buttons.length();i++){<>。

计算器的Java源代码

计算器的Java源代码
button_7.setBorder(BorderFactory.createRaisedBevelBorder());
button_7.setText("7");
button_8.setFont(new Font("SansSerif",0,12));
button_8.setForeground(Color.blue);
button_4.setBorder(BorderFactory.createRaisedBevelBorder());
button_4.setText("4");
button_5.setFont(new Font("SansSerif",0,12));
button_5.setForeground(Color.blue);
//保存最近一次运算符
String recentOperation=null;
//保存最近一次的运算数据
String recentNum=null;
//描述当前输入状态,是重新输入还是接在后面,重新输入时为true
boolean isNew=true;
public Calculator(){
button_4.addActionListener(this);
button_5.addActionListener(this);
button_6.addActionListener(this);
button_7.addActionListener(this);
button_8.addActionListener(this);
JButton button_CE=new JButton();

java编写计算器源代码

java编写计算器源代码

计算器的制作import java.awt.*;import java.awt.event.*;class ComputerExe extends Frame implements ActionListener {Button b1,b2,b3,b4;TextField t1,t2,t3;Label l1,l2;public static void main(String[] args)//程序入口{new ComputerExe();//创建本窗体对象}ComputerExe()//构造方法{super("四则运算");setBounds(100,100,300,200);setVisible(true);b1=new Button("加");b2=new Button("减");b3=new Button("乘");b4=new Button("除");t1=new TextField(15);t2=new TextField(15);t3=new TextField(15);l1=new Label("");l2=new Label("=");l1.setBackground(Color.yellow);l1.setForeground(Color.red);l2.setBackground(Color.yellow);l2.setForeground(Color.red);t3.setEditable(false);setLayout(new FlowLayout());//更改窗体框架的布局add(t1);add(l1);add(t2);add(l2);add(t3);add(b1);add(b2);add(b3);add(b4);setVisible(true);b1.addActionListener(this);b2.addActionListener(this);b3.addActionListener(this);b4.addActionListener(this);}//构造方法结束public void actionPerformed(ActionEvent e) { double n1,n2,n3;if(e.getSource()==b1){try{n1=Double.parseDouble(t1.getText());n2=Double.parseDouble(t2.getText());n3=n1+n2;t3.setText(String.valueOf(n3));l1.setText("+");}catch(NumberFormatException w){t3.setText("操作数应该为数字!");}}if(e.getSource()==b2){try{n1=Double.parseDouble(t1.getText());n2=Double.parseDouble(t2.getText());n3=n1-n2;t3.setText(String.valueOf(n3));l1.setText("-");}catch(NumberFormatException w){t3.setText("操作数应该为数字!");}}if(e.getSource()==b3){try{n1=Double.parseDouble(t1.getText());n2=Double.parseDouble(t2.getText());n3=n1*n2;t3.setText(String.valueOf(n3));l1.setText("*");}catch(NumberFormatException w){t3.setText("操作数应该为数字!");}}if(e.getSource()==b4){try{n1=Double.parseDouble(t1.getText());n2=Double.parseDouble(t2.getText());n3=n1/n2;t3.setText(String.valueOf(n3));l1.setText("/");}catch(NumberFormatException w){t3.setText("操作数应该为数字!");}}}}//类结束。

JAVA编写的计算器源代码

JAVA编写的计算器源代码

JAVA编写的计算器源代码// Calculator.javaimport javax.swing.*; // 引入swing库import java.awt.*; // 引入awt库import java.awt.event.*; // 引入awt.event库public class Calculator extends JFrame implements ActionListener//定义按钮private JButton zero;private JButton one;private JButton two;private JButton three;private JButton four;private JButton five;private JButton six;private JButton seven;private JButton eight;private JButton nine;private JButton point;private JButton equal; private JButton plus; private JButton minus; private JButton multiply; private JButton divide; private JButton backspace; private JButton ac;private JButton ce;private JButton sqrt; private JButton sqr;private JButton plus_minus; private JButton delete; private JButton sin;private JButton cos;private JButton tan;private JButton log;private JButton nfactorial; private JButton cubic; private JButton coln;private JButton factorial;//定义文本框private JTextField resulttext;// 定义boolean变量boolean clrdisp = true; // 昵称确定是否清除计算器显示boolean isCalculate = false; // 是否可以执行计算// 定义String变量,用于存储操作符String optr;//定义存储第一个操作数double num1;//初始化构造函数public Calculato//设置布局setLayout(new BorderLayout();//创建面板JPanel northPanel = new JPanel(;JPanel centerPanel = new JPanel(;JPanel southPanel = new JPanel(;//设置面板布局northPanel.setLayout(new FlowLayout(); centerPanel.setLayout(new GridLayout(4, 5)); southPanel.setLayout(new FlowLayout();//设置计算器显示resulttext = new JTextField(28); northPanel.add(resulttext);resulttext.setEditable(false);//初始化按钮zero = new JButton("0");one = new JButton("1");two = new JButton("2");three = new JButton("3");four = new JButton("4");five = new JButton("5");six = new JButton("6");seven = new JButton("7");eight = new JButton("8");nine = new JButton("9");point = new JButton(".");equal = new JButton("=");plus = new JButton("+");minus = new JButton("-"); multiply = new JButton("*"); divide = new JButton("/"); backspace = new JButton("<-"); ac = new JButton("AC");ce = new JButton("CE");sqrt = new JButton("sqrt");sqr = new JButton("sqr");plus_minus = new JButton("+/-");。

java语言写的计算器源代码附解析

java语言写的计算器源代码附解析

//把代码改成Calc.java编译运行,完整版计算器,最下面是计算器界面import java.awt.*;import java.awt.event.*;public class Calc extends WindowAdapter implements ActionListener, MouseListener{Color cMoveOut=new Color(240 ,240 ,240);Color cMoveIn =new Color( 255,255,55);//状态变量boolean clicked=true;//判断是否单击了小数点boolean clear=true;//判断是否单击了符号位double previous;//记录第一个操作数double next;//记录第二个操作数String fuhao;//记录符号位int first=1;//标记是否开始一次新的运算过程Frame f;Panel p1,p2;TextField tf;Font fnt;Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b0;Button bDiv,bSqrt,bMulti,bMinus,bPercent,bPlus,bReciprocal,bEqual,bDot,bNegative,bBack;Button bPingFang , bDaoShu , bSin, bCos ,bTan;Button bC;GridLayout p2Layout;public void display(){f=new Frame("计算器");f.setSize(280,213);f.setLocation(200,200);f.setBackground(Color.LIGHT_GRAY);f.setResizable(false);p1=new Panel(new FlowLayout());tf=new TextField(35);tf.setText("0.");tf.setEditable(false);p1.add(tf);f.add(p1,BorderLayout.NORTH);p2Layout=new GridLayout(5,5,5,4);p2=new Panel(p2Layout);f.add(p2,BorderLayout.CENTER);fnt=new Font("Serief",Font.BOLD,20);b1=new Button("1");b1.setFont(fnt);b2=new Button("2");b2.setFont(fnt);b3=new Button("3");b3.setFont(fnt);b4=new Button("4");b4.setFont(fnt);b5=new Button("5");b5.setFont(fnt);b6=new Button("6");b6.setFont(fnt);b7=new Button("7");b7.setFont(fnt);b8=new Button("8");b8.setFont(fnt);b7.setFont(fnt);b9=new Button("9");b9.setFont(fnt);b0=new Button("0");b0.setFont(fnt);b9.setFont(fnt);bPingFang=new Button("^2"); bPingFang.setFont(fnt); bDaoShu=new Button("1/X"); bDaoShu.setFont(fnt);bSin=new Button("sin");bSin.setFont(fnt);bCos=new Button("cos"); bCos.setFont(fnt);bTan=new Button("tan"); bTan.setFont(fnt);b1.addActionListener(this);b2.addActionListener(this);b3.addActionListener(this);b4.addActionListener(this);b5.addActionListener(this);b6.addActionListener(this);b7.addActionListener(this);b8.addActionListener(this);b9.addActionListener(this);b0.addActionListener(this); bBack=new Button("Back");//退格bBack.setFont(fnt);bC=new Button("C");//清空bC.setFont(fnt);bDiv=new Button("/");bDiv.setFont(fnt);bSqrt=new Button("sqrt"); bSqrt.setFont(fnt);bMulti=new Button("*"); bMulti.setFont(fnt);bMinus=new Button("-"); bMinus.setFont(fnt);bPercent=new Button("%"); bPercent.setFont(fnt);bPlus=new Button("+"); bPlus.setFont(fnt);bEqual=new Button("="); bEqual.setFont(fnt);bDot=new Button(".");bDot.setFont(fnt);bNegative=new Button("+/-"); bNegative.setFont(fnt); bBack.addActionListener(this);bC.addActionListener(this); bDiv.addActionListener(this); bSqrt.addActionListener(this); bPingFang.addActionListener(this); bPercent.addActionListener(this); bDaoShu.addActionListener(this); bMulti.addActionListener(this); bPlus.addActionListener(this); bMinus.addActionListener(this); bMulti.addActionListener(this); bDiv.addActionListener(this); bSin.addActionListener(this); bCos.addActionListener(this); bTan.addActionListener(this); bEqual.addActionListener(this); bDot.addActionListener(this); bNegative.addActionListener(this); bSqrt.addMouseListener(this); bPingFang.addMouseListener(this); bPercent.addMouseListener(this); bC.addMouseListener(this); bBack.addMouseListener(this);b7.addMouseListener(this);b8.addMouseListener(this);b9.addMouseListener(this); bDiv.addMouseListener(this); bDaoShu.addMouseListener(this); b4.addMouseListener(this);b5.addMouseListener(this);b6.addMouseListener(this); bMulti.addMouseListener(this); bSin.addMouseListener(this);b1.addMouseListener(this);b2.addMouseListener(this);b3.addMouseListener(this); bMinus.addMouseListener(this); bCos.addMouseListener(this);b0.addMouseListener(this); bDot.addMouseListener(this); bEqual.addMouseListener(this); bPlus.addMouseListener(this); bTan.addMouseListener(this);p2.add(bSqrt);p2.add(bPingFang);p2.add(bPercent);p2.add(bC);p2.add(bBack);p2.add(b7);p2.add(b8);p2.add(b9);p2.add(bDiv);p2.add(bDaoShu);p2.add(b4);p2.add(b5);p2.add(b6);p2.add(bMulti);p2.add(bSin);p2.add(b1);p2.add(b2);p2.add(b3);p2.add(bMinus);p2.add(bCos);p2.add(b0);p2.add(bDot);p2.add(bEqual);p2.add(bPlus);p2.add(bTan);f.setV isible(true);f.addWindowListener(this);}public void actionPerformed(ActionEvent e) {if (first ==1)tf.setText("");first=0;Object temp=e.getSource();//退格if (temp== bBack){String s=tf.getText();tf.setText("");for (int i=0;i<s.length()-1;i++){char a=s.charAt(i);tf.setText(tf.getText()+a);}}//清零if (temp==bC){tf.setText("0.");clear=true;first=1;}if (temp==b0){//判断是否单击了符号位if (clear==false)tf.setText("");tf.setText(tf.getText()+"0");}if (temp==b1){if (clear==false)tf.setText("");tf.setText(tf.getText()+"1");clear=true;}if (temp==b2){if (clear==false)tf.setText("");tf.setText(tf.getText()+"2");clear=true;}if (temp==b3){if (clear==false)tf.setText("");tf.setText(tf.getText()+"3");clear=true;}if (temp==b4){if (clear==false)tf.setText("");tf.setText(tf.getText()+"4");clear=true;}if (temp==b5){if (clear==false)tf.setText("");tf.setText(tf.getText()+"5");clear=true;}if (temp==b6){if (clear==false)tf.setText("");tf.setText(tf.getText()+"6");clear=true;}if (temp==b7){if (clear==false)tf.setText("");tf.setText(tf.getText()+"7");clear=true;}if (temp==b8){if (clear==false)tf.setText("");tf.setText(tf.getText()+"8");clear=true;}if (temp==b9){if (clear==false)tf.setText("");tf.setText(tf.getText()+"9");clear=true;}//判断是否含有小数点if (temp == bDot){clicked=true;for (int i=0;i<tf.getText().length();i++)if ('.'==tf.getText().charAt(i)){clicked = false;break;}if (clicked == true){tf.setText(tf.getText()+".");clear=true;}}//bSqrtif(temp == bSqrt){tf.setText( Math.sqrt( Double.parseDouble(tf.getText())) + "" );clear=false;}//bPingFangif(temp == bPingFang ){tf.setText( Math.pow( Double.parseDouble(tf.getText() ), 2 ) + "" );clear=false;}//倒数if(temp == bDaoShu){tf.setText( 1 / Double.parseDouble(tf.getText()) + "" );clear =false;}//Sinif(temp == bSin){tf.setText( Math.sin( Math.toRadians( Double.parseDouble( tf.getText() ) ) ) + "" );clear =false;}//Cosif(temp == bCos){tf.setText( Math.cos( Math.toRadians( Double.parseDouble( tf.getText() ) ) ) + "" );clear =false;}//tanif(temp == bTan){tf.setText( Math.tan( Math.toRadians( Double.parseDouble( tf.getText() ) ) ) + "");clear =false;}//加法运算if (temp==bPlus){previous=Double.parseDouble(tf.getText());fuhao="+";clear=false;//System.out.print("+");}//减法运算if (temp == bMinus){previous=Double.parseDouble(tf.getText());fuhao="-";clear=false;}//乘法运算if (temp == bMulti){previous=Double.parseDouble(tf.getText());fuhao="*";clear=false;}//除法运算bDivif (temp == bDiv){previous=Double.parseDouble(tf.getText());fuhao="/";clear=false;}//求余数if(temp == bPercent){previous=Double.parseDouble( tf.getText());fuhao="%";clear=false;}//等于if (temp==bEqual){try{next = Double.parseDouble(tf.getText());tf.setText("");if (fuhao =="+")tf.setText(previous + next +"");if(fuhao == "-")tf.setText(previous - next +"");if(fuhao == "*")tf.setText(previous * next +"");if(fuhao == "/")tf.setText(previous / next +"");if(fuhao == "%")tf.setText(previous % next +"");clear=false;}catch(Exception ex){tf.setText("请检查输入的数据:" + ex.getMessage()) ;clear=false;}}}public void mouseEntered(MouseEvent e){Object temp= e.getSource();if(temp==bPingFang){//System.out.println( bBack.getBackground() );bPingFang.setBackground(cMoveIn);}if(temp==bSqrt){bSqrt.setBackground(cMoveIn);}if(temp==bPercent){bPercent.setBackground(cMoveIn);}if(temp==bC){bC.setBackground(cMoveIn);}if(temp==bBack){bBack.setBackground(cMoveIn);}if(temp==b7){b7.setBackground(cMoveIn);}if(temp==b8){b8.setBackground(cMoveIn);}if(temp==b9){b9.setBackground(cMoveIn);}if(temp==bDiv){bDiv.setBackground(cMoveIn);}if(temp==bDaoShu){bDaoShu.setBackground(cMoveIn); }if(temp==b4){b4.setBackground(cMoveIn);}if(temp==b5){b5.setBackground(cMoveIn);}if(temp==b6){b6.setBackground(cMoveIn);}if(temp==bMulti){bMulti.setBackground(cMoveIn); }if(temp==bSin){bSin.setBackground(cMoveIn);}if(temp==b1){b1.setBackground(cMoveIn);}if(temp==b2){b2.setBackground(cMoveIn);}if(temp==b3){b3.setBackground(cMoveIn);}if(temp==bMinus){bMinus.setBackground(cMoveIn); }if(temp==bCos){bCos.setBackground(cMoveIn);}if(temp==b0){b0.setBackground(cMoveIn);}if(temp==bDot){bDot.setBackground(cMoveIn);}if(temp==bEqual){bEqual.setBackground(cMoveIn);}if(temp==bPlus){bPlus.setBackground(cMoveIn);}if(temp==bTan){bTan.setBackground(cMoveIn);}}public void mouseExited(MouseEvent e) {Object temp= e.getSource();if(temp==bPingFang){//System.out.println( bBack.getBackground() );bPingFang.setBackground(cMoveOut);}if(temp==bSqrt){bSqrt.setBackground(cMoveOut);}if(temp==bPercent){bPercent.setBackground(cMoveOut);}if(temp==bC){bC.setBackground(cMoveOut);}if(temp==bBack){bBack.setBackground(cMoveOut);}if(temp==b7){b7.setBackground(cMoveOut);}if(temp==b8){b8.setBackground(cMoveOut);}if(temp==b9){b9.setBackground(cMoveOut);}if(temp==bDiv){bDiv.setBackground(cMoveOut);}if(temp==bDaoShu){bDaoShu.setBackground(cMoveOut); }if(temp==b4){b4.setBackground(cMoveOut);}if(temp==b5){b5.setBackground(cMoveOut);}if(temp==b6){b6.setBackground(cMoveOut);}if(temp==bMulti){bMulti.setBackground(cMoveOut); }if(temp==bSin){bSin.setBackground(cMoveOut);}if(temp==b1){b1.setBackground(cMoveOut);}if(temp==b2){b2.setBackground(cMoveOut);}if(temp==b3){b3.setBackground(cMoveOut);}if(temp==bMinus){bMinus.setBackground(cMoveOut); }if(temp==bCos){bCos.setBackground(cMoveOut);}if(temp==b0){b0.setBackground(cMoveOut);}if(temp==bDot){bDot.setBackground(cMoveOut);}if(temp==bEqual){bEqual.setBackground(cMoveOut);}if(temp==bPlus){bPlus.setBackground(cMoveOut);}if(temp==bTan){bTan.setBackground(cMoveOut);}}public static void main(String args[]){Calc frame=new Calc();frame.display();}public void windowClosing(WindowEvent e){System.exit(0);}public void mouseClicked(MouseEvent arg0) {}public void mousePressed(MouseEvent arg0) {}public void mouseReleased(MouseEvent arg0) { }}。

超级简单明了的JAVA计算器代码

超级简单明了的JAVA计算器代码

package caculator;import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class caculator extends JFrame implements ActionListener { double sum=0;static double getValue;static int action ;int i=0,j=0,p=0,l;double par1;JButton Jk=new JButton("k");JButton J1 = new JButton("1");JButton J2 = new JButton("2");JButton J3 = new JButton("3");JButton J4 = new JButton("4");JButton J5 = new JButton("5");JButton J6 = new JButton("6");JButton J7 = new JButton("7");JButton J8 = new JButton("8");JButton J9 = new JButton("9");JButton J0 = new JButton("0");JButton Je = new JButton("=");JButton Ja = new JButton("+");JButton Jr = new JButton("-");JButton Jm = new JButton("*");JButton Jd = new JButton("/");JButton Jc = new JButton("清除");JButton Jpt = new JButton(".");JTextArea show = new JTextArea("");caculator(){super("caculator");setLocation(200,200);setSize(300,350);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true);JPanel jp = new JPanel();jp.setLayout(null);jp.add(J1);jp.add(J2);jp.add(J3);jp.add(J4);jp.add(J5);jp.add(J6);jp.add(J7);jp.add(J8);jp.add(J9);jp.add(J0);jp.add(Je);jp.add(Ja);jp.add(Jr);jp.add(Jm);jp.add(Jd);jp.add(Jc);jp.add(Je);jp.add(Jpt);J9.setBackground(Color.pink); J8.setBackground(Color.pink); J7.setBackground(Color.pink); J6.setBackground(Color.pink); J5.setBackground(Color.pink); J4.setBackground(Color.pink); J3.setBackground(Color.pink); J2.setBackground(Color.pink); J1.setBackground(Color.pink); J0.setBackground(Color.pink);Je.setBackground(Color.pink);Ja.setBackground(Color.pink); Jr.setBackground(Color.pink); Jm.setBackground(Color.pink); Jd.setBackground(Color.pink); Jc.setBackground(Color.pink); Jpt.setBackground(Color.pink);J7.setBounds(10,70,60,50);J8.setBounds(75,70,60,50);J9.setBounds(140,70,60,50); J4.setBounds(10,125,60,50); J5.setBounds(75,125,60,50); J6.setBounds(140,125,60,50); J1.setBounds(10,180,60,50); J2.setBounds(75,180,60,50); J3.setBounds(140,180,60,50); J0.setBounds(10,235,60,50); Je.setBounds(75,235,60,50); Jpt.setBounds(140,235,60,50);Jd.setBounds(205,70,60,50); Jm.setBounds(205,125,60,50); Jr.setBounds(205,180,60,50); Ja.setBounds(205,235,60,50); Jc.setBounds(205,10,60,50);J1.addActionListener(this);J2.addActionListener(this);J3.addActionListener(this);J4.addActionListener(this);J5.addActionListener(this);J6.addActionListener(this);J7.addActionListener(this);J8.addActionListener(this);J9.addActionListener(this);J0.addActionListener(this);Ja.addActionListener(this);Jr.addActionListener(this);Jm.addActionListener(this);Je.addActionListener(this);Jc.addActionListener(this);Jpt.addActionListener(this);jp.add(show);show.setBackground(Color.pink);show.setBounds(10,10,180,50);setContentPane(jp);}@Overridepublic void actionPerformed(ActionEvent e) { if(e.getSource()==J0){show.setText("0"); }if(e.getSource()==J1){show.setText("1");}if(e.getSource()==J2){show.setText("2");}if(e.getSource()==J3){show.setText("3");}if(e.getSource()==J4){show.setText("4");}if(e.getSource()==J5){show.setText("5");}if(e.getSource()==J6){show.setText("6");}if(e.getSource()==J7){show.setText("7");}if(e.getSource()==J8){show.setText("8");}if(e.getSource()==J9){show.setText("9");}par1=Double.parseDouble(show.getText()); if(e.getSource()==Ja){show.setText("");if(j==0){sum=par1;}else if(action==1){sum+=par1;}setsum();j++;p=0;i=0;action = 1;} if(e.getSource()==Jr){show.setText("");if(j==0){sum=par1;}else if(action==2){sum-=par1;}setsum();j++;p=0;i=0;action = 2;}if(e.getSource()==Jm){show.setText(""); if(j==0){sum=par1;}else if(action==3){sum*=par1;}setsum();j++;p=0;i=0;action = 3;}if(e.getSource()==Jd){show.setText(""); if(j==0){sum=par1;}else if(action==4){sum/=par1;}setsum();j++;p=0;i=0;action = 4;if(e.getSource()==Jc){clear();}if(e.getSource()==Jpt){show.append(".");}if(e.getSource()==Je){switch(action){case 1:show.setText(String.valueOf(sum+=par1)); break;case 2:show.setText(String.valueOf(sum-=par1)); break;case 3:show.setText(String.valueOf(sum*=par1)); break;case 4:show.setText(String.valueOf(sum/=par1)); break;}i=0;j=0;action=0;}}private void setsum() {show.setText(String.valueOf(sum));String s=show.getText();}void clear(){i=0;j=0;p=0;sum=0;action=0;show.setText("0"); }// TODO Auto-generated method stubpublic static void main(String args[]){caculator ct=new caculator();}}。

计算器(JAVA)源代码

计算器(JAVA)源代码

//定义计算的类import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JTextField;public class Caculate implements ActionListener { //设置属性private String data;private JTextField text;private String result = "0";private boolean start_new = false;private double last_value = 0;private String ope = "";private double value = 0;public String getResult (){return result;}//定义一个构造方法public Caculate(JTextField text){this.text = text;}@Override//按钮事件处理public void actionPerformed(ActionEvent cal) { // TODO Auto-generated method stubdata = cal.getActionCommand();data = data.trim();if("0123456789".indexOf(data) != -1){numButton(data);}else if (".".indexOf(data) != -1){dotButton(data);}else if ("+-*/".indexOf(data) != -1){operateButton(data);}else if ("=".indexOf(data)!=-1){equalButton();}//System.out.println(data);System.out.println(result);text.setText(result);}//计算程序private void numButton(String da){if(!start_new){result = result + da;}else{result = da;}while (result.startsWith("0")&&!result.startsWith("0.")&&result.length()>0){ result = result.substring(1);}start_new = false;}private void dotButton(String da){if(da.indexOf(".")!= -1){result = result + da;}}private void operateButton(String da){if(result.length()>0){last_value = Double.parseDouble(result);ope = da;start_new = true;}}private void equalButton(){value = Double.parseDouble(result);if(ope.equals("+")){result = String.valueOf(last_value + value);}else if(ope.equals("-")){result = String.valueOf(last_value - value);}else if(ope.equals("*")){result = String.valueOf(last_value * value);}else if(ope.equals("/")){if(value == 0){result = "ERROR";}else{result = String.valueOf(last_value / value);}}// 去掉结尾的“.0000...”if (result.matches(".+\\.0+")) {result = result.substring(0, stIndexOf("."));}// 设置状态start_new = true;ope = "";}}import javax.swing.JTextField;public class Culator {private static final String String = null;JTextField op;private String re;/*** @param args*/public static void main(String[] args) {Culator cul = new Culator();cul.init();// TODO Auto-generated method stub}public void init(){javax.swing.JFrame frame = new javax.swing.JFrame(); frame.setTitle("计算器");java.awt.FlowLayout f1= new java.awt.FlowLayout();frame.setLayout(f1);javax.swing.JMenuBar cai = createMB();frame.setJMenuBar(cai);javax.swing.JButton mc = new javax.swing.JButton("MC");op= new javax.swing.JTextField("0",25);//设置数字从右边开始显示op.setHorizontalAlignment(JTextField.RIGHT);//设置按钮javax.swing.JButton mr = new javax.swing.JButton("MR"); javax.swing.JButton ms = new javax.swing.JButton("MS"); javax.swing.JButton mp = new javax.swing.JButton("M+"); javax.swing.JButton mm = new javax.swing.JButton("M-"); javax.swing.JButton delete = new javax.swing.JButton(" ←"); javax.swing.JButton ce = new javax.swing.JButton("CE "); javax.swing.JButton c = new javax.swing.JButton(" C "); javax.swing.JButton pm = new javax.swing.JButton(" ± "); javax.swing.JButton r = new javax.swing.JButton(" √"); javax.swing.JButton seven = new javax.swing.JButton(" 7 "); javax.swing.JButton eight = new javax.swing.JButton(" 8 "); javax.swing.JButton nine = new javax.swing.JButton(" 9 ");javax.swing.JButton under = new javax.swing.JButton(" / ");javax.swing.JButton percent = new javax.swing.JButton(" % ");javax.swing.JButton four = new javax.swing.JButton(" 4 ");javax.swing.JButton five = new javax.swing.JButton(" 5 ");javax.swing.JButton six = new javax.swing.JButton(" 6 ");javax.swing.JButton and = new javax.swing.JButton(" * ");javax.swing.JButton ds = new javax.swing.JButton("1/x");javax.swing.JButton one = new javax.swing.JButton(" 1 ");javax.swing.JButton two = new javax.swing.JButton(" 2 ");javax.swing.JButton three = new javax.swing.JButton(" 3 ");javax.swing.JButton m = new javax.swing.JButton(" - ");javax.swing.JButton equal = new javax.swing.JButton(" = ");javax.swing.JButton zero = new javax.swing.JButton(" 0 ");javax.swing.JButton dot = new javax.swing.JButton(" . ");javax.swing.JButton plus = new javax.swing.JButton(" + ");//添加按钮frame.add(op);frame.add(mc);frame.add(mr);frame.add(ms);frame.add(mp);frame.add(mm);frame.add(delete);frame.add(ce);frame.add(c);frame.add(pm);frame.add(r);frame.add(seven);frame.add(eight);frame.add(nine);frame.add(under);frame.add(percent);frame.add(four);frame.add(five);frame.add(six);frame.add(and);frame.add(ds);frame.add(one);frame.add(two);frame.add(three);frame.add(m);frame.add(equal);frame.add(zero);frame.add(dot);frame.add(plus);frame.setSize(290,300);//实例化一个Caculate类Caculate cal = new Caculate(op);//增加监听op.addActionListener(cal);mc.addActionListener(cal);mr.addActionListener(cal);ms.addActionListener(cal);mp.addActionListener(cal);mm.addActionListener(cal);delete.addActionListener(cal);ce.addActionListener(cal);c.addActionListener(cal);pm.addActionListener(cal);r.addActionListener(cal);seven.addActionListener(cal);eight.addActionListener(cal);nine.addActionListener(cal);under.addActionListener(cal); percent.addActionListener(cal);four.addActionListener(cal);five.addActionListener(cal);six.addActionListener(cal);and.addActionListener(cal);ds.addActionListener(cal);one.addActionListener(cal);two.addActionListener(cal);three.addActionListener(cal);m.addActionListener(cal);equal.addActionListener(cal);zero.addActionListener(cal);dot.addActionListener(cal);plus.addActionListener(cal);frame.setDefaultCloseOperation(3); frame.setResizable(false);frame.setVisible(true);}//创建一个设置TextField窗口容的函数//public void setOp(String re){// op.setText(re);//}//创建一个常带有菜单的菜单条,就加到JFrame上显示private javax.swing.JMenuBar createMB(){//创建菜单条javax.swing.JMenuBar mb = new javax.swing.JMenuBar();//创建查看菜单javax.swing.JMenu view = new javax.swing.JMenu("查看(V)");//创建菜单项javax.swing.JMenuItem biaozhun = new javax.swing.JMenuItem("标准型"); javax.swing.JMenuItem kexue = new javax.swing.JMenuItem("科学型"); javax.swing.JMenuItem chengxu = new javax.swing.JMenuItem("程序员"); javax.swing.JMenuItem tongji = new javax.swing.JMenuItem("统计信息"); javax.swing.JMenuItem history = new javax.swing.JMenuItem("历史");//将菜单项添加到菜单上view.add(biaozhun);view.add(kexue);view.add(chengxu);view.add(tongji);view.add(history);//创建编辑菜单javax.swing.JMenu operation = new javax.swing.JMenu("编辑(O)");//创建菜单项javax.swing.JMenuItem copy = new javax.swing.JMenuItem("复制"); javax.swing.JMenuItem paste = new javax.swing.JMenuItem("黏贴"); javax.swing.JMenuItem hr = new javax.swing.JMenuItem("历史记录");//将菜单项添加到菜单上operation.add(copy);operation.add(paste);operation.add(hr);//创建帮助菜单javax.swing.JMenu help = new javax.swing.JMenu("帮助(H)");//创建帮助菜单项javax.swing.JMenuItem vh = new javax.swing.JMenuItem("查看帮助"); javax.swing.JMenuItem about = new javax.swing.JMenuItem("关于计算器"); //将菜单项添加到菜单上help.add(vh);help.add(about);//加上一个分隔条help.addSeparator();//将菜单添加到菜单条上mb.add(view);mb.add(operation);mb.add(help);return mb;} }。

简易计算器源代码--java

简易计算器源代码--java

package calculator;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.math.BigDecimal;import javax.swing.*;public class Operation extends JFrame implements ActionListener{/****/private static final long serialVersionUID = 1L;private final String str[] = {"7","8","9","/","4","5","6","*","1","2", "3","-",".","0","=","+"};private final JButton[] JB = new JButton[str.length];private final JButton reset = new JButton("CE");private final JTextField display = new JTextField("");Operation(){super("计算器");JPanel panel1 = new JPanel(new BorderLayout());JPanel panel2 = new JPanel(new GridLayout(4,4));panel1.add(BorderLayout.CENTER, display);panel1.add(BorderLayout.EAST, reset);int i;for( i = 0;i < str.length;i++){JB[i] = new JButton(str[i]);panel2.add(JB[i]);}getContentPane().setLayout(new BorderLayout());getContentPane().add(BorderLayout.NORTH,panel1);getContentPane().add(BorderLayout.SOUTH, panel2);setSize(800,800);for(i = 0;i < str.length;i++){JB[i].addActionListener(this);}reset.addActionListener(this);display.addActionListener(this);setVisible(true);setDefaultCloseOperation((WindowConstants.DISPOSE_ON_CLOSE));pack();}public void actionPerformed(ActionEvent e) {// TODO 自动生成的方法存根Object target = e.getSource();String label = e.getActionCommand();if(target == reset){handlereset();}else if("0123456789.".indexOf(label)>=0){handleNumber(label);}elsehandleOperator(label);}private void handleNumber(String key) {// TODO 自动生成的方法存根if ((isFirstDigit)&&("0123456789".indexOf(key)>=0))display.setText(key);else if ((key.equals(".")))display.setText(display.getText() + ".");else if (!key.equals("."))display.setText(display.getText() + key);isFirstDigit = false;}boolean isFirstDigit = true;double number1 = 0.0;double number2 = 0.0;String operator = "=";BigDecimal df ;private void handlereset() {// TODO 自动生成的方法存根display.setText("");isFirstDigit = true;operator = "=";}public void handleOperator(String key) {if (operator.equals("+")){number1 = Double.valueOf(display.getText());number2 = add(number1,number2);df = new BigDecimal(number2);display.setText(String.valueOf( df.setScale(5, BigDecimal.ROUND_HALF_UP).doubleValue()));}else if (operator.equals("-")){number1 = Double.valueOf(display.getText());number2 = sub(number2,number1);df = new BigDecimal(number2);display.setText(String.valueOf( df.setScale(5, BigDecimal.ROUND_HALF_UP).doubleValue()));}else if (operator.equals("*")){number1 = Double.valueOf(display.getText());number2 = mul(number1,number2);df = new BigDecimal(number2);display.setText(String.valueOf( df.setScale(5, BigDecimal.ROUND_HALF_UP).doubleValue()));}else if (operator.equals("/")){number1 = Double.valueOf(display.getText());if(number1 == 0)display.setText("error");else{number2 = div(number2,number1);df = new BigDecimal(number2);display.setText(String.valueOf( df.setScale(5, BigDecimal.ROUND_HALF_UP).doubleValue()));}}else if (operator.equals("=")){number2 = Double.valueOf(display.getText());display.setText(String.valueOf(number2));}operator = key;isFirstDigit = true;}private double div(double key1, double key2) {// TODO 自动生成的方法存根double result = 0.0;result = key1 / key2;return result;}private double mul(double key1, double key2) {// TODO 自动生成的方法存根double result = 0.0;result = key1 * key2;return result;}private double sub(double key1, double key2) { // TODO 自动生成的方法存根double result = 0.0;result = key1 - key2;return result;}private double add(double key1, double key2) { // TODO 自动生成的方法存根double result = 0.0;result = number1 + number2;return result;}public static void main(String[] args) {new Operation();}}。

JAVA计算器源代码

JAVA计算器源代码

计算器源代码一、计算器源代码文件名:computer1.javaimport java.awt.*;import java.awt.event.*;public class computer1 extends Frame implements ActionListener{//声明窗口类并实现动作事件接口。

Button n0,n1,n2,n3,n4,n5,n6,n7,n8,n9;//声明数字按钮Button op,os,om,od,oe,oc;//声明操作按钮TextField tfd;//声明文本框String flg,rslt;//声明标志串、结果串Panel p1,p2,p3;//声明面板int i1,i2;float flt;computer1(){super("加减乘除计算器");n0 = new Button("0");//实现各按钮n1 = new Button("1");n2 = new Button("2");n3 = new Button("3");n4 = new Button("4");n5 = new Button("5");n6 = new Button("6");n7 = new Button("7");n8 = new Button("8");n9 = new Button("9");op = new Button("加");os = new Button("减");om = new Button("乘");od = new Button("除");oe = new Button("=");oc = new Button("c");tfd = new TextField(20);//实现文本框p1=new Panel();//实现各面板p2=new Panel();p3=new Panel();setLayout(new FlowLayout());//布局设计,用于安排按钮位置p1.add(n0);//将各数字按钮放入p1中p1.add(n1);p1.add(n2);p1.add(n3);p1.add(n4);p1.add(n5);p1.add(n6);p1.add(n7);p1.add(n8);p1.add(n9);p2.add(op);//将各操作按钮放入p2、p3中p2.add(os);p2.add(om);p2.add(od);p3.add(oe);p3.add(oc);setLayout(new BorderLayout());//布局设计,用于安排面板位置add("North",tfd);add("West",p1);add("Center",p2);add("East",p3);n0.addActionListener(this);//注册监听器到各按钮n1.addActionListener(this);n2.addActionListener(this);n3.addActionListener(this);n4.addActionListener(this);n5.addActionListener(this);n6.addActionListener(this);n7.addActionListener(this);n8.addActionListener(this);n9.addActionListener(this);op.addActionListener(this);os.addActionListener(this);om.addActionListener(this);od.addActionListener(this);oe.addActionListener(this);oc.addActionListener(this);addWindowListener(new closeWin());setSize(600,100);//确定窗口的尺寸setVisible(true);}public static void main (String args[]){new computer1();}public void actionPerformed(ActionEvent e){//处理鼠标事件的方法try{//异常处理if(e.getSource()==n0)//按数字键时tfd.setText(tfd.getText()+"0");if(e.getSource()==n1)tfd.setText(tfd.getText()+"1");if(e.getSource()==n2)tfd.setText(tfd.getText()+"2");if(e.getSource()==n3)tfd.setText(tfd.getText()+"3");if(e.getSource()==n4)tfd.setText(tfd.getText()+"4");if(e.getSource()==n5)tfd.setText(tfd.getText()+"5");if(e.getSource()==n6)tfd.setText(tfd.getText()+"6");if(e.getSource()==n7)tfd.setText(tfd.getText()+"7");if(e.getSource()==n8)tfd.setText(tfd.getText()+"8");if(e.getSource()==n9)tfd.setText(tfd.getText()+"9");if(e.getSource()==op){//按加号键时i1 = Integer.parseInt(tfd.getText());tfd.setText("");flg = "op";}if(e.getSource()==os){//按减号键时i1 = Integer.parseInt(tfd.getText());tfd.setText("");flg = "os";}if(e.getSource()==om){//按乘号键时i1 = Integer.parseInt(tfd.getText());tfd.setText("");flg = "om";}if(e.getSource()==od){//按除号键时i1 = Integer.parseInt(tfd.getText());tfd.setText("");flg = "od";}if(e.getSource()==oe){//按等号键时i2 = Integer.parseInt(tfd.getText());if(flg=="op"){rslt=Integer.toString(i1+i2);}if(flg=="os"){rslt=Integer.toString(i1-i2);}if(flg=="om"){rslt=Integer.toString(i1*i2);}if(flg=="od"){//除法需做小数处理flt=((float)i1)/((float)i2);rslt=Float.toString(flt);}tfd.setText(rslt);}if(e.getSource()==oc){//按清除键时tfd.setText("");flg = "";}}catch(Exception ex){}//扑捉到异常,但不进行处理}}class closeWin extends WindowAdapter{ //关闭窗口public void windowClosing(WindowEvent e){Frame frm=(Frame)(e.getSource());frm.dispose();System.exit(0);}}二、计算器界面三、修改后计算器界面。

简单的计算器源代码

简单的计算器源代码

//计算器,已经编译通过import java.awt.*;import java.awt.event.*;import javax.swing.*;public class testZ extends JFrame implements ActionListener{private JPanel jPanel1,jPanel2;private JTextField resultField;private JButton s1,s2,s3,s4,s5,s6,s7,s8,s9,s0,b1,b2,b3,b4,f1,f2; private boolean end,add,sub,mul,div;private String str;private double num1,num2;public testZ(){super("计算器");setSize(300,240);Container con=getContentPane();con.setLayout(new BorderLayout());jPanel1=new JPanel();jPanel1.setLayout(new GridLayout(1,1));jPanel2=new JPanel();jPanel2.setLayout(new GridLayout(4,4));resultField=new JTextField("0");jPanel1.add(resultField);con.add(jPanel1,BorderLayout.NORTH);s1=new JButton(" 1 "); s1.addActionListener(this);s2=new JButton(" 2 "); s2.addActionListener(this);s3=new JButton(" 3 "); s3.addActionListener(this);s4=new JButton(" 4 "); s4.addActionListener(this);s5=new JButton(" 5 "); s5.addActionListener(this);s6=new JButton(" 6 "); s6.addActionListener(this);s7=new JButton(" 7 "); s7.addActionListener(this);s8=new JButton(" 8 "); s8.addActionListener(this);s9=new JButton(" 9 "); s9.addActionListener(this);s0=new JButton(" 0 "); s0.addActionListener(this);b1=new JButton(" + "); b1.addActionListener(this);b2=new JButton(" - "); b2.addActionListener(this);b3=new JButton(" * "); b3.addActionListener(this);b4=new JButton(" / "); b4.addActionListener(this);f1=new JButton(" . "); f1.addActionListener(this);f2=new JButton(" = "); f2.addActionListener(this);jPanel2.add(s1);jPanel2.add(s2);jPanel2.add(s3);jPanel2.add(b1);jPanel2.add(s4);jPanel2.add(s5);jPanel2.add(s6);jPanel2.add(b2);jPanel2.add(s7);jPanel2.add(s8);jPanel2.add(s9);jPanel2.add(b3);jPanel2.add(s0);jPanel2.add(f1);jPanel2.add(f2);jPanel2.add(b4);con.add(jPanel2,BorderLayout.CENTER);}public void num(int i){String s = null;s=String.valueOf(i);if(end){//如果数字输入结束,则将文本框置零,重新输入resultField.setText("0");end=false;}if((resultField.getText()).equals("0")){//如果文本框的内容为零,则覆盖文本框的内容resultField.setText(s);}else{//如果文本框的内容不为零,则在内容后面添加数字str = resultField.getText() + s;resultField.setText(str);}}public void actionPerformed(ActionEvent e){ //数字事件 if(e.getSource()==s1)num(1);else if(e.getSource()==s2)num(2);else if(e.getSource()==s3)num(3);else if(e.getSource()==s4)num(4);else if(e.getSource()==s5)num(5);else if(e.getSource()==s6)num(6);else if(e.getSource()==s7)num(7);else if(e.getSource()==s8)num(8);else if(e.getSource()==s9)num(9);else if(e.getSource()==s0)num(0);//符号事件else if(e.getSource()==b1)sign(1);else if(e.getSource()==b2)sign(2);else if(e.getSource()==b3)sign(3);else if(e.getSource()==b4)sign(4);//等号else if(e.getSource()==f1){str=resultField.getText();if(str.indexOf(".")<=1){str+=".";resultField.setText(str);}}else if(e.getSource()==f2){num2=Double.parseDouble(resultField.getText());if(add){num1=num1 + num2;}else if(sub){num1=num1 - num2;}else if(mul){num1=num1 * num2;}else if(div){num1=num1 / num2;}resultField.setText(String.valueOf(num1));end=true;}}public void sign(int s){if(s==1){add=true;sub=false;mul=false;div=false;}else if(s==2){add=false;sub=true;mul=false;div=false;}else if(s==3){add=false;sub=false;mul=true;div=false;}else if(s==4){add=false;sub=false;mul=false;div=true;}num1=Double.parseDouble(resultField.getText()); end=true;}public static void main(String[] args){testZ th1=new testZ();th1.show();}}。

计算器设计java版的源代码

计算器设计java版的源代码

这是用java编写的计算器的源代码,界面粗糙,在elipse中运行通过,就两个类:第一个类frame ,代码如下package jisuanqi;import java.awt.Color;import java.awt.Container;import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import java.awt.Point;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JTextField;public class frame {static double aa=0;//寄存器static int bb=0;//判断是否为连续输入运算符static int cc=0;static char dd='d';//记录前一次运算符的值public static void main(String args[]){JFrame fm=new JFrame("计算器");fm.setSize(220,180);//fm.setMaximumSize(null);fm.setLocation(new Point(200,100));fm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);Container container=fm.getContentPane();GridBagLayout layout=new GridBagLayout();container.setLayout(layout);GridBagConstraints gg=new GridBagConstraints();JTextField txt=new JTextField("0");txt.setHorizontalAlignment(JTextField.RIGHT);txt.setEditable(false);txt.setBackground(Color.white);gg.gridx=0;gg.gridy=0;gg.fill=GridBagConstraints.HORIZONTAL;gg.gridheight=1;gg.gridwidth=15;container.add(txt,gg);gg.fill=GridBagConstraints.NONE;gg.gridy=1;gg.gridwidth=2;JButton btn7=new JButton("7");Mylistener mylistener7 =new Mylistener(btn7.getText(),txt);btn7.addActionListener(mylistener7);container.add(btn7,gg);JButton btn8=new JButton("8");Mylistener mylistener8 =new Mylistener(btn8.getText(),txt); btn8.addActionListener(mylistener8);gg.gridx=2;container.add(btn8,gg);JButton btn9=new JButton("9");Mylistener mylistener9 =new Mylistener(btn9.getText(),txt); btn9.addActionListener(mylistener9);gg.gridx=4;container.add(btn9,gg);JButton btnc=new JButton("/");gg.gridx=6;container.add(btnc,gg);Mylistener mylistenerc =new Mylistener(btnc.getText(),txt); btnc.addActionListener(mylistenerc);JButton btnb=new JButton("B");gg.gridx=8;container.add(btnb,gg);Mylistener mylistenerb =new Mylistener(btnb.getText(),txt); btnb.addActionListener(mylistenerb);gg.gridx=0;gg.gridy=2;JButton btn4=new JButton("4");Mylistener mylistener4 =new Mylistener(btn4.getText(),txt); btn4.addActionListener(mylistener4);container.add(btn4,gg);JButton btn5=new JButton("5");gg.gridx=2;Mylistener mylistener5 =new Mylistener(btn5.getText(),txt); btn5.addActionListener(mylistener5);container.add(btn5,gg);JButton btn6=new JButton("6");gg.gridx=4;Mylistener mylistener6 =new Mylistener(btn6.getText(),txt); btn6.addActionListener(mylistener6);container.add(btn6,gg);JButton btncf=new JButton("*");gg.gridx=6;Mylistener mylistenercf =new Mylistener(btncf.getText(),txt); btncf.addActionListener(mylistenercf);container.add(btncf,gg);gg.gridx=8;Mylistener mylistenerce =new Mylistener(btnce.getText(),txt); btnce.addActionListener(mylistenerce);container.add(btnce,gg);gg.gridx=0;gg.gridy=3;JButton btn1=new JButton("1");container.add(btn1,gg);Mylistener mylistener1 =new Mylistener(btn1.getText(),txt); btn1.addActionListener(mylistener1);JButton btn2=new JButton("2");gg.gridx=2;Mylistener mylistener2 =new Mylistener(btn2.getText(),txt); btn2.addActionListener(mylistener2);container.add(btn2,gg);JButton btn3=new JButton("3");gg.gridx=4;Mylistener mylistener3 =new Mylistener(btn3.getText(),txt); btn3.addActionListener(mylistener3);container.add(btn3,gg);JButton btnjf=new JButton("-");gg.gridx=6;Mylistener mylistenerjf =new Mylistener(btnjf.getText(),txt); btnjf.addActionListener(mylistenerjf);container.add(btnjf,gg);JButton btncc=new JButton("C");gg.gridx=8;Mylistener mylistenercc =new Mylistener(btncc.getText(),txt); btncc.addActionListener(mylistenercc);container.add(btncc,gg);gg.gridx=0;gg.gridy=4;JButton btn0=new JButton("0");container.add(btn0,gg);Mylistener mylistenero =new Mylistener(btn0.getText(),txt); btn0.addActionListener(mylistenero);JButton btnqf=new JButton("+/-");gg.gridx=2;Mylistener mylistenerqf =new Mylistener(btnqf.getText(),txt); btnqf.addActionListener(mylistenerqf);container.add(btnqf,gg);gg.gridx=4;Mylistener mylistenerd =new Mylistener(btnd.getText(),txt);btnd.addActionListener(mylistenerd);container.add(btnd,gg);JButton btnjiaf=new JButton("+");gg.gridx=6;Mylistener mylistenerfff =new Mylistener(btnjiaf.getText(),txt);btnjiaf.addActionListener(mylistenerfff);container.add(btnjiaf,gg);JButton btndy=new JButton("=");gg.gridx=8;container.add(btndy,gg);Mylistener mylistenerdy =new Mylistener(btndy.getText(),txt);btndy.addActionListener(mylistenerdy);fm.setVisible(true);}}第二个类Mylistener 代码如下:package jisuanqi;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JTextField;public class Mylistener implements ActionListener {private String a;//button上的值private JTextField txt;//txt的引用Mylistener(String aa,JTextField txt){//构造方法this.a=aa;this.txt=txt;}void init(){frame.aa=0;//寄存器frame.bb=0;//判断是否为连续输入运算符=0;frame.dd='d';//记录前一次运算符的值this.txt.setText("0");}public void actionPerformed(ActionEvent e){System.out.println(a);if(a=="0"| a=="1"| a=="2" | a=="3"| a=="4"| a=="5"| a=="6"| a=="7" | a=="8" | a=="9" | a=="."){if(frame.bb!=0){this.txt.setText("0");frame.bb=0;}System.out.println("数字"+"b"+frame.bb);if(this.txt.getText().length()==1){//当前文本框里的字符串的长度为一if(a=="."){//当前输入为小数点this.txt.setText(this.txt.getText()+".");}else{//当前输入不为小数点if(this.txt.getText()=="0" & this.a=="0"){this.txt.setText("0");}else if(this.txt.getText().charAt(0)=='0'& this.a!="0"){this.txt.setText(a);}else if(this.txt.getText().charAt(0) != '0'){this.txt.setText(this.txt.getText()+a);}}}else{//当前文本框里的字符串的长度不为一if(a=="."){//当前输入是. 就查找txt的值中有不有 .if(this.txt.getText().indexOf('.')== -1){//没出现.this.txt.setText(this.txt.getText()+a);}else {//原字符串不变}}else{this.txt.setText(this.txt.getText()+a);}}}//**************************************************if(a=="+" | a=="-" | a=="*" | a=="/" ){frame.bb++;if(this.txt.getText().charAt(this.txt.getText().length()-1)=='.'){//处理以.结尾的字符串this.txt.setText(this.txt.getText().substring(0,this.txt.getText().length ()-1));}//如果字符串以.结尾就把字符串的最后以为抹去if(==0){//第一次输入运算符frame.aa=Double.valueOf(this.txt.getText()).doubleValue();=1;frame.dd=this.a.charAt(0);//记录前一次输入运算符的值}else{//在这里面进行四则运算//加法运算if(frame.dd=="+".charAt(0)){frame.aa+=Double.valueOf(this.txt.getText()).doubleValue();this.txt.setText(String.valueOf(frame.aa).toString());frame.dd=this.a.charAt(0);}else if(frame.dd=="-".charAt(0)){frame.aa-=Double.valueOf(this.txt.getText()).doubleValue();this.txt.setText(String.valueOf(frame.aa).toString());frame.dd=this.a.charAt(0);}else if(frame.dd=="*".charAt(0)){frame.aa*=Double.valueOf(this.txt.getText()).doubleValue();this.txt.setText(String.valueOf(frame.aa).toString());frame.dd=this.a.charAt(0);}else if(frame.dd=="/".charAt(0)){if(this.txt.getText().charAt(0)=="0".charAt(0)){//除零是不允许的System.out.println("被除数不能为零");this.init();}else{doubleff=Double.valueOf(this.txt.getText()).doubleValue();frame.aa=frame.aa/ff;this.txt.setText(String.valueOf(frame.aa).toString());frame.dd=this.a.charAt(0);}}}}if(a=="B"){if(this.txt.getText().length()==1 ){this.txt.setText("0");}if(this.txt.getText().length()!=1 &this.txt.getText().charAt(0)!='0'){this.txt.setText(this.txt.getText().substring(0,this.txt.getText().length ()-1));}}if(a=="+/-"){if(this.txt.getText().charAt(0)!='-'){this.txt.setText("-"+this.txt.getText());}else{this.txt.setText(this.txt.getText().substring(1));}}if(a=="E"){this.init();}if(a=="C"){this.txt.setText("0");}if(a=="="){if(!=0){if(frame.dd=="+".charAt(0)){frame.aa+=Double.valueOf(this.txt.getText()).doubleValue();this.txt.setText(String.valueOf(frame.aa).toString());//frame.dd=this.a.charAt(0);}else if(frame.dd=="-".charAt(0)){frame.aa-=Double.valueOf(this.txt.getText()).doubleValue();this.txt.setText(String.valueOf(frame.aa).toString());//frame.dd=this.a.charAt(0);}else if(frame.dd=="*".charAt(0)){frame.aa*=Double.valueOf(this.txt.getText()).doubleValue();this.txt.setText(String.valueOf(frame.aa).toString());//frame.dd=this.a.charAt(0);}else if(frame.dd=="/".charAt(0)){if(this.txt.getText().charAt(0)=="0".charAt(0)){//除零是不允许的System.out.println("被除数不能为零");this.init();}else{doubleff=Double.valueOf(this.txt.getText()).doubleValue();frame.aa=frame.aa/ff;this.txt.setText(String.valueOf(frame.aa).toString());//frame.dd=this.a.charAt(0);}}frame.aa=0;//寄存器frame.bb=1;//判断是否为连续输入运算符=0;frame.dd='d';}}}}。

java版计算器源代码

java版计算器源代码

java版计算器源代码:import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;import java.awt.*;import java.math.BigDecimal;import java.math.MathContext;import java.math.RoundingMode;import java.awt.Color;/*** java版计算器*/public class Calculator extends JFrame {final int WIN_W = 250, WIN_H = 250;JPanel myPanel, panelSuper;public Calculator() {// 主面板panelSuper = new JPanel();panelSuper.setLayout(null);// 设置窗口位置double width = Toolkit.getDefaultToolkit().getScreenSize().width; double height =Toolkit.getDefaultToolkit().getScreenSize().height;this.setBounds((int) (width - WIN_W) / 2, (int) (height - WIN_H) / 2,WIN_W, WIN_H);// 窗口配置this.setTitle("java版计算器");this.validate();this.setResizable(false);this.setVisible(true);this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);// 添加计算器按钮面板myPanel = new MyPanel();this.add(myPanel, BorderLayout.CENTER);}public static void main(String[] args) {new Calculator();}/*** 计算器按钮面板类*/class MyPanel extends JPanel implements ActionListener {JButton button1, button2, button3, button4, button5, button6, button7,button8, button9, button0, buttonJia, buttonJian, buttonCheng,buttonChu, buttonDeng, buttonDian, buttonC, buttonDel, buttonZF, buttonGH;JTextField jTextField; // 计算器显示屏char oper; // 操作符String key, allKey = "1234567890.±del", jjccKey = " -*/";BigDecimal d1, d2;boolean first;public MyPanel() {// 设置布局this.setLayout(new FlowLayout(FlowLayout.LEFT, 4, 5));// 计算器显示屏jTextField = new JTextField(21);jTextField.setHorizontalAlignment(JTextField.RIGHT);jTextField.setEditable(false);jTextField.setBackground(new Color(255, 255, 255));jTextField.setText("0");this.add(jTextField);// 计算器按钮button1 = new JButton("1");button2 = new JButton("2");button3 = new JButton("3");button4 = new JButton("4");button5 = new JButton("5");button6 = new JButton("6");button7 = new JButton("7");button8 = new JButton("8");button9 = new JButton("9");button0 = new JButton("0");buttonJia = new JButton(" ");buttonJian = new JButton("-");buttonCheng = new JButton("*");buttonChu = new JButton("/");buttonDeng = new JButton("=");buttonDian = new JButton(".");buttonDel = new JButton("del");buttonC = new JButton("c");buttonZF = new JButton("±");buttonGH = new JButton("√");button1.setPreferredSize(new Dimension(55, 30));button2.setPreferredSize(new Dimension(55, 30));button3.setPreferredSize(new Dimension(55, 30));button4.setPreferredSize(new Dimension(55, 30));button5.setPreferredSize(new Dimension(55, 30));button6.setPreferredSize(new Dimension(55, 30));button7.setPreferredSize(new Dimension(55, 30));button8.setPreferredSize(new Dimension(55, 30));button9.setPreferredSize(new Dimension(55, 30));button0.setPreferredSize(new Dimension(55, 30));buttonJia.setPreferredSize(new Dimension(55, 30)); buttonJian.setPreferredSize(new Dimension(55, 30)); buttonCheng.setPreferredSize(new Dimension(55, 30)); buttonChu.setPreferredSize(new Dimension(55, 30)); buttonDeng.setPreferredSize(new Dimension(55, 30)); buttonDian.setPreferredSize(new Dimension(55, 30)); buttonDel.setPreferredSize(new Dimension(55, 30)); buttonC.setPreferredSize(new Dimension(55, 30));buttonZF.setPreferredSize(new Dimension(55, 30));buttonGH.setPreferredSize(new Dimension(55, 30)); this.add(buttonDel);this.add(buttonC);this.add(buttonZF);this.add(buttonGH);this.add(button1);this.add(button2);this.add(button3);this.add(buttonJia);this.add(button4);this.add(button5);this.add(button6);this.add(buttonJian);this.add(button7);this.add(button8);this.add(button9);this.add(buttonCheng);this.add(button0);this.add(buttonDian);this.add(buttonDeng);this.add(buttonChu);buttonDel.addActionListener(this);buttonC.addActionListener(this);buttonZF.addActionListener(this);buttonGH.addActionListener(this);button1.addActionListener(this);button2.addActionListener(this);button3.addActionListener(this);button4.addActionListener(this);button5.addActionListener(this);button6.addActionListener(this);button7.addActionListener(this);button8.addActionListener(this);button9.addActionListener(this);button0.addActionListener(this);buttonJia.addActionListener(this);buttonJian.addActionListener(this);buttonCheng.addActionListener(this);buttonChu.addActionListener(this);buttonDeng.addActionListener(this);buttonDian.addActionListener(this);// 计算器初始化init();}/*** 计算器初始化*/public void init() {d1 = new BigDecimal("0");d1 = new BigDecimal("0");key = "=";oper = '=';jTextField.setText("0");first = true; // 用于标记是否进行连续操作(例如按键顺序为“9*9====”,第一次等于first由true变为false,如果!first,按等号相当于用上一次的结果与第二个操作数相乘)}/*** 按钮监听*/public void actionPerformed(ActionEvent e) {JButton b = (JButton) e.getSource();if (b == buttonDian) { // 按下.jTextField.setText(jTextField.getText() ".");if (first) {d2 = d1 = getNum();} else {d2 = getNum();}} else if (b == buttonZF) {// 按下±BigDecimal d = getNum();d = new BigDecimal("0").subtract(d);setFormatNum(d);if (first) {d2 = d1 = getNum();} else {d2 = getNum();}} else if (b == buttonDel) {// 按下delif (jTextField.getText().length() == 1|| jTextField.getText().length() == 2&& jTextField.getText().startsWith("-")) { jTextField.setText("0");} else {String s = jTextField.getText();s = s.substring(0, s.length() - 1);if (s.endsWith("E ") || s.endsWith("E-"))s = s.substring(0, s.length() - 2);jTextField.setText(s);if (first) {d2 = d1 = getNum();} else {d2 = getNum();}}} else if (b == buttonC) {// 按下cinit();} else if (b == buttonJia) {// 按下BigDecimal s;if (!first && allKey.indexOf(key) >= 0) {if (oper == '-' || oper == '/') {s = operate(d1, oper, d2);} else {s = operate(d2, oper, d1);}setFormatNum(s);}// 如果不是第一次,且上一次操作是对数字进行操作else {first = false;}d2 = d1 = getNum();// System.out.print("111我执行啦\n");oper = ' ';} else if (b == buttonJian) {// 按下-BigDecimal s;if (!first && allKey.indexOf(key) >= 0) {s = operate(d1, oper, d2);setFormatNum(s);}// 如果不是第一次,且上一次操作是对数字进行操作 else {first = false;}d2 = d1 = getNum();oper = '-';} else if (b == buttonCheng) {// 按下*BigDecimal s;if (!first && allKey.indexOf(key) >= 0) {if (oper == '-' || oper == '/') {s = operate(d1, oper, d2);} else {s = operate(d2, oper, d1);}setFormatNum(s);}// 如果不是第一次,且上一次操作是对数字进行操作 else {first = false;}d2 = d1 = getNum();oper = '*';} else if (b == buttonChu) {// 按下/BigDecimal s;if (!first && allKey.indexOf(key) >= 0) {s = operate(d1, oper, d2);setFormatNum(s);}// 如果不是第一次,且上一次操作是对数字进行操作 else {first = false;}d2 = d1 = getNum();oper = '/';} else if (b == buttonGH) {// 按下平方根if (jTextField.getText().startsWith("-")) {init();return;}BigDecimal d = getNum();MathContext mc = new MathContext(10, RoundingMode.HALF_DOWN);d = new BigDecimal(Math.sqrt(d.doubleValue()), mc);setFormatNum(d);if (first) {d2 = d1 = getNum();} else {d2 = getNum();}} else if (b == buttonDeng) {// 按下=BigDecimal s = null;d2 = getNum();if (!key.equals("=")) {s = operate(d1, oper, d2);} else {s = operate(d2, oper, d1);}if (oper != '=' && !key.equals("=")) {// 上一次操作为 -*/d1 = getNum();}setFormatNum(s);first = true;} else { // 按下其他按钮if (this.jTextField.getText().equals("0")|| allKey.indexOf(key) == -1) {this.jTextField.setText(b.getText());} else {this.jTextField.setText(jTextField.getText()b.getText());}if (first) {d2 = d1 = getNum();} else {d2 = getNum();}// d2作被加数:d2 d1}key = b.getText();}/*** 获取操作数** @return 操作数*/public BigDecimal getNum() {BigDecimal d = new BigDecimal(jTextField.getText());return d;}public void setFormatNum(BigDecimal dd) {MathContext mc = new MathContext(18, RoundingMode.HALF_DOWN);BigDecimal d = new BigDecimal(dd.toString(), mc);String num = d.toString();if (num.endsWith(".0"))num = num.replaceAll("\\.0", "");this.jTextField.setText(num);}/*** 计算** @param a1* 操作数1* @param c* 操作符* @param a2* 操作数2* @return*/public BigDecimal operate(BigDecimal a1, char c, BigDecimal a2) {MathContext mc = new MathContext(10, RoundingMode.HALF_DOWN); switch (c) {case ' ':return a1.add(a2);case '-':return a1.subtract(a2);case '*':return a1.multiply(a2);case '/':if (pareTo(new BigDecimal("0")) == 0) {init();return new BigDecimal("0"); }return a1.divide(a2, mc);default:return a2;}}}}。

java简单计算器代码

java简单计算器代码

java简单计算器代码Java简单计算器代码:```javaimport java.util.Scanner;public class Calculator {public static void main(String[] args) {Scanner input = new Scanner(System.in);double num1, num2, result = 0;char operator;System.out.print("请输入第一个数:");num1 = input.nextDouble();System.out.print("请输入运算符号(+、-、*、/):"); operator = input.next().charAt(0);System.out.print("请输入第二个数:");num2 = input.nextDouble();switch(operator) {case '+':result = num1 + num2;break;case '-':result = num1 - num2;break;case '*':result = num1 * num2;break;case '/':result = num1 / num2;break;default:System.out.println("运算符输入错误,请重新输入!");return;}System.out.println("运算结果:" + num1 + operator + num2 + "=" + result);}}```列表:1. 首先,在程序中导入`java.util.Scanner`包,以便从控制台读取用户输入内容。

计算器的Java源代码

计算器的Java源代码

计算器程序的源代码import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Calculator extends Frame implements ActionListener, WindowListener{private Container container;private GridBagLayout layout;private GridBagConstraints constraints;private JTextField displayField; //计算结果显示区private String lastCommand; //保存+,-,*,/,=命令0private double result; //保存计算结果private boolean start; //判断是否为数字的开始private JMenuBar menubar;private JMenuItem m_exit,m2_ejz,m2_bjz;private Dialog dialog;private Label label_dialog;private JButton button_sqrt,button_plusminus,button_CE,button_cancel,button_1,button_2,button_3,button_4,button_5,button_6,button_7,button_8,button_9,button_0, button_plus,button_minus,button_multiply,button_divide,button_point,button_equal,button_log,button_tan,button_cos,button_sin,button_exp;public Calculator() //构造方法设置布局、为按钮注册事件监听器{super("Calculator");this.setLocation(240,200);this.setSize(350,300);this.setResizable(true);this.setLayout(new GridLayout(7,1));this.addmyMenu(); //调用成员方法添加菜单displayField=new JTextField(30);this.add(displayField);displayField.setEditable(true);start=true;result=0;lastCommand = "=";JPanel panel0=new JPanel();panel0.setLayout(new GridLayout(1,4,4,4));JPanel panel1=new JPanel();panel1.setLayout(new GridLayout(1,5,4,4));this.add(panel1);button_sqrt=new JButton("sqrt");button_plusminus=new JButton("+/-");button_exp=new JButton("exp");button_CE=new JButton("C");button_cancel=new JButton("CE");JPanel panel2=new JPanel();panel2.setLayout(new GridLayout(1,5,4,4));this.add(panel2);button_7=new JButton("7");button_8=new JButton("8");button_9=new JButton("9");button_log=new JButton("log");button_divide=new JButton("/");JPanel panel3=new JPanel();panel3.setLayout(new GridLayout(1,5,4,4));this.add(panel3);button_4=new JButton("4");button_5=new JButton("5");button_6=new JButton("6");button_tan=new JButton("tan");button_multiply=new JButton("*");JPanel panel4=new JPanel();panel4.setLayout(new GridLayout(1,5,4,4));this.add(panel4);button_1=new JButton("1");button_2=new JButton("2");button_3=new JButton("3");button_cos=new JButton("cos");button_minus=new JButton("-");JPanel panel5=new JPanel();panel5.setLayout(new GridLayout(1,5,4,4));this.add(panel5);button_0=new JButton("0");button_point=new JButton(".");button_equal=new JButton("=");button_sin=new JButton("sin");button_plus=new JButton("+");panel1.add(button_sqrt);panel1.add(button_plusminus);panel1.add(button_exp);panel1.add(button_CE);panel1.add(button_cancel);panel2.add(button_7);panel2.add(button_8);panel2.add(button_9);panel2.add(button_log);panel2.add(button_divide);panel3.add(button_4);panel3.add(button_5);panel3.add(button_6);panel3.add(button_tan);panel3.add(button_multiply);panel4.add(button_1);panel4.add(button_2);panel4.add(button_3);panel4.add(button_cos);panel4.add(button_minus);panel5.add(button_0);panel5.add(button_point);panel5.add(button_equal);panel5.add(button_sin);panel5.add(button_plus);button_sqrt.addActionListener(this);button_plusminus.addActionListener(this);button_exp.addActionListener(this);button_CE.addActionListener(this);button_cancel.addActionListener(this);button_7.addActionListener(this);button_8.addActionListener(this);button_9.addActionListener(this);button_log.addActionListener(this);button_divide.addActionListener(this);button_4.addActionListener(this);button_5.addActionListener(this);button_6.addActionListener(this);button_tan.addActionListener(this);button_multiply.addActionListener(this);button_1.addActionListener(this);button_2.addActionListener(this);button_3.addActionListener(this);button_cos.addActionListener(this);button_minus.addActionListener(this);button_0.addActionListener(this);button_point.addActionListener(this);button_equal.addActionListener(this);button_sin.addActionListener(this);button_plus.addActionListener(this);this.addWindowListener(new WinClose()); //注册窗口监听器this.setVisible(true);}private void addmyMenu() //菜单的添加{JMenuBar menubar=new JMenuBar();this.add(menubar);JMenu m1=new JMenu("选项");JMenu m2=new JMenu("进制转换");JMenuItem m1_exit=new JMenuItem("退出");m1_exit.addActionListener(this);JMenuItem m2_ejz=new JMenuItem("二进制");m2_ejz.addActionListener(this);JMenuItem m2_bjz=new JMenuItem("八进制");m2_bjz.addActionListener(this);JMenu m3 = new JMenu(" 帮助");JMenuItem m3_Help = new JMenuItem("作者");m3_Help.addActionListener(this);dialog = new Dialog(this,"关于",true); //模式窗口 dialog.setSize(240,80);label_dialog = new Label("",Label.CENTER); //标签的字符串为空,居中对齐dialog.add(label_dialog);dialog.addWindowListener(this); //为对话框注册窗口事件监听器m1.add(m1_exit);menubar.add(m1);m2.add(m2_ejz);m2.add(m2_bjz);menubar.add(m2);m3.add(m3_Help);menubar.add(m3); }public void actionPerformed(ActionEvent e) //按钮的单击事件处理方法{if(e.getSource().equals(button_1)||e.getSource().equals(button_2)||e.getSource().equals(button_3)||e.getSource().equals(button_4)||e.getSource().equals(button_5)|| e.getSource().equals(button_6)||e.getSource().equals(button_7)|| e.getSource().equals(button_8)||e.getSource().equals(button_9) ||e.getSource().equals(button_0)||e.getSource().equals(button_point)||e.getSource().equals(button_plusmin us)||e.getSource().equals(button_cancel)||e.getSource().equals(button_CE)){ //非运算符的处理方法String input=e.getActionCommand();if (start){displayField.setText("");start=false;if(input.equals("+/-"))displayField.setText(displayField.getText()+"-");}if(!input.equals("+/-")){String str=displayField.getText();if(input.equals("C")) //退格键的实现方法{if(str.length()>0)displayField.setText(str.substring(0,str.length()-1));}else if(input.equals("CE")) //清零键的实现方法{displayField.setText("0");start=true;}elsedisplayField.setText(displayField.getText()+input);}}else if (e.getActionCommand()=="二进制") //二进制的转换{int n=Integer.parseInt(displayField.getText());displayField.setText(Integer.toBinaryString(n));}else if (e.getActionCommand()=="八进制") //八进制的转换{int n=Integer.parseInt(displayField.getText());displayField.setText(Integer.toOctalString(n));}else if (e.getActionCommand()=="退出") //选项中退出的处理方法{System.exit(0);}else if (e.getActionCommand()=="作者") //按下'帮助'菜单栏中用法的处理方法{label_dialog.setText("熊瑛琪制作 \n学号:080320618");dialog.setLocation(400,250);dialog.setVisible(true);}else //各运算符的识别{String command=e.getActionCommand();if(start){lastCommand=command;}else{calculate(Double.parseDouble(displayField.getText()));lastCommand=command;start=true;}}}public void calculate(double x) //各运算符的具体运算方法 {double d=0;if (lastCommand.equals("+"))result+= x;else if (lastCommand.equals("-"))result-=x;else if (lastCommand.equals("*"))result*=x;else if (lastCommand.equals("/"))result/=x;else if (lastCommand.equals("="))result=x;else if (lastCommand.equals("sqrt")){d=Math.sqrt(x);result=d;}else if (lastCommand.equals("exp")){d=Math.exp(x);result=d;}else if (lastCommand.equals("log")){d=Math.log(x);result=d;}else if (lastCommand.equals("tan")){d=Math.tan(x);result=d;}else if (lastCommand.equals("cos")){d=Math.cos(x);result=d;}else if (lastCommand.equals("sin")){d=Math.sin(x);result=d;}displayField.setText(""+ result);}public void windowClosing(WindowEvent e){if(e.getSource()==dialog)dialog.setVisible(false); //隐藏对话框elseSystem.exit(0);}public void windowOpened(WindowEvent e) { }public void windowActivated(WindowEvent e) { }public void windowDeactivated(WindowEvent e) { }public void windowClosed(WindowEvent e) { }public void windowIconified(WindowEvent e) { }public void windowDeiconified(WindowEvent e) { }public static void main(String args[]){Calculator calculator=new Calculator();}}class WinClose implements WindowListener{public void windowClosing(WindowEvent e) //单击窗口关闭按钮时触发并执行实现窗口监听器接口{System.exit(0); //结束程序运行}public void windowOpened(WindowEvent e){}public void windowActivated(WindowEvent e){}public void windowDeactivated(WindowEvent e){}public void windowClosed(WindowEvent e){}public void windowIconified(WindowEvent e){}public void windowDeiconified(WindowEvent e){}}程序运行在对程序进行测试时发现“sin”函数出现异常点击“sin”然后输入“90”出现以下情况经过对程序代码的检查发现在下面方法中public void calculate(double x) //各运算符的具体运算方法{double d=0;if (lastCommand.equals("+"))result+= x;else if (lastCommand.equals("-"))result-=x;else if (lastCommand.equals("*"))result*=x;else if (lastCommand.equals("/"))result/=x;else if (lastCommand.equals("="))result=x;else if (lastCommand.equals("sqrt")){d=Math.sqrt(x);result=d;}else if (lastCommand.equals("exp")){d=Math.exp(x);result=d;}else if (lastCommand.equals("log")){d=Math.log(x);result=d;}else if (lastCommand.equals("tan")){d=Math.tan(x);result=d;}else if (lastCommand.equals("cos")){d=Math.cos(x);result=d;}displayField.setText(""+ result); }发现遗漏以下代码else if (lastCommand.equals("sin")){d=Math.sin(x);result=d;}修改后再次进行测试输入“1.5707963”(约为0.5*pi)再键入“sin”得以下结果可见程序修改成功。

计算器java 源代码

计算器java 源代码
else if(e.getSource()==mat_sin)
presssin();
else if(e.getSource()==mat_tan)
presstan();
else if(e.getSource()==mat_cos)
presscos();
else if(e.getSource()==do_ans)
p0=new Panel(); //显示屏的布局
p0.setLayout(g0);
p0.add(number);
p0.setBounds(50,20,600,70);//左50上20长600宽70
//按纽的布局
p1=new Panel();
p1.setLayout(g1);
p1.add(num_1);//第一排按纽
p1.add(num_7);//第三排按纽
p1.add(num_8);
p1.add(num_9);
p1.add(mat_sin);
p1.add(mat_cos);
பைடு நூலகம்
p1.add(num_0);//第四排按钮
p1.add(num_p);
p1.add(do_ans);
p1.add(do_dele);
//定义各个控件的样式
number=new JTextField(20);//构造宽度为20个字符的文本框
number.setHorizontalAlignment(JTextField.RIGHT); //设置水平对齐方式
number.setEnabled(true);
number.setText("0");
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package jsq;import java.awt.Color;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowEvent;import java.awt.event.WindowListener;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.UIManager;public class Test implements ActionListener {/****/JFrame f = new JFrame();JTextField tf = new JTextField("0.");JMenuBar bar=new JMenuBar();JMenu menuEdit=new JMenu("编辑(E)");JMenu menuView=new JMenu("查看(V)");JMenu menuHelp=new JMenu("帮助(H)");JMenuItem menuEditCopy=new JMenuItem("复制(C)");JMenuItem menuEditPaste=new JMenuItem("粘贴(V)");JMenuItem menuHelpAbout = new JMenuItem("关于计算器(A)");JPanel panel0 = new JPanel();JPanel panel2 = new JPanel();JPanel panel = new JPanel();JPanel panel3 = new JPanel();JPanel panel4 = new JPanel();JPanel panel5 = new JPanel();JButton btBk = new JButton(" Backspace"); JButton btCe = new JButton("Ce");JButton btCl = new JButton("C");JButton bt7 = new JButton("7");JButton bt8 = new JButton("8");JButton bt9 = new JButton("9");JButton btDiv = new JButton("/");JButton btSqrt = new JButton("sqrt");JButton bt4 = new JButton("4");JButton bt5 = new JButton("5");JButton bt6 = new JButton("6");JButton btMult = new JButton("*"); JButton btMol = new JButton(" % ");JButton bt1 = new JButton("1");JButton bt2 = new JButton("2");JButton bt3 = new JButton("3");JButton btMinu = new JButton("-"); JButton btCoun = new JButton(" 1/x");JButton bt0 = new JButton("0");JButton btPoint = new JButton("."); JButton btEqual = new JButton("="); JButton btAdd = new JButton("+");JButton btSign = new JButton(" +/-");/***@param args*/public void init(){f.add(panel0);f.add(tf,"North");f.setJMenuBar(bar);bar.add(menuEdit);bar.add(menuView);bar.add(menuHelp);menuEdit.add(menuEditCopy);menuEdit.add(menuEditPaste);menuHelp.add(menuHelpAbout);tf.setEditable(false);//不可编辑tf.setHorizontalAlignment(JTextField.RIGHT);//从右侧输入数据panel0.add(panel2);panel0.add(panel);panel0.add(panel3);panel0.add(panel4);panel0.add(panel5);panel2.setLayout(new GridLayout(1,4));panel2.add(btBk);panel2.add(btCe);panel2.add(btCl);panel.setLayout(new GridLayout(1,5));panel.add(bt7);panel.add(bt8);panel.add(bt9);panel.add(btDiv);panel.add(btSqrt);//根号panel3.setLayout(new GridLayout(1,5));panel3.add(bt4);panel3.add(bt5);panel3.add(bt6);panel3.add(btMult);panel3.add(btMol);//百分号panel4.setLayout(new GridLayout(1,5));panel4.add(bt1);panel4.add(bt2);panel4.add(bt3);panel4.add(btMinu);panel4.add(btCoun);//倒数panel5.setLayout(new GridLayout(1,5));panel5.add(bt0);panel5.add(btPoint);panel5.add(btAdd);panel5.add(btEqual);panel5.add(btSign);//正负符号btBk.setForeground(new Color(255, 0, 0)); btCe.setForeground(new Color(255, 0, 0)); btCl.setForeground(new Color(255, 0, 0)); btAdd.setForeground(new Color(255, 0, 0)); btMult.setForeground(new Color(255, 0, 0)); btDiv.setForeground(new Color(255, 0, 0)); btMinu.setForeground(new Color(255, 0, 0)); btEqual.setForeground(new Color(255, 0, 0));bt0.setForeground(new Color(0,0,255));bt1.setForeground(new Color(0, 0, 255));bt2.setForeground(new Color(0,0,255));bt3.setForeground(new Color(0,0,255));bt4.setForeground(new Color(0,0,255));bt5.setForeground(new Color(0,0,255));bt6.setForeground(new Color(0,0,255));bt7.setForeground(new Color(0,0,255));bt8.setForeground(new Color(0,0,255));bt9.setForeground(new Color(0,0,255)); btSqrt.setForeground(new Color(0,0,255)); btMol.setForeground(new Color(0,0,255)); btCoun.setForeground(new Color(0,0,255)); btSign.setForeground(new Color(0,0,255));//注册监听bt1.addActionListener(this);bt2.addActionListener(this);bt3.addActionListener(this);bt4.addActionListener(this);bt5.addActionListener(this);bt6.addActionListener(this);bt7.addActionListener(this);bt8.addActionListener(this);bt9.addActionListener(this);bt0.addActionListener(this);btAdd.addActionListener(this);btMinu.addActionListener(this);btMult.addActionListener(this);btDiv.addActionListener(this);btEqual.addActionListener(this);btPoint.addActionListener(this);btSqrt.addActionListener(this);btMol.addActionListener(this);btCoun.addActionListener(this);btSign.addActionListener(this);btBk.addActionListener(this);btCe.addActionListener(this);btCl.addActionListener(this);menuEditCopy.addActionListener(this);menuEditPaste.addActionListener(this);menuHelpAbout.addActionListener(this);f.addWindowListener(new MyWinLis());f.setTitle("计算器");f.setSize(295,240);f.setResizable(false);//不能改变窗体大小f.setVisible(true);}String foreNum=null;String currOpr=null;String currNum=null;boolean i = true;String copy;//复制public void actionPerformed(ActionEvent e) {// TODO自动生成方法存根Object obj=e.getSource();//输入数字if(obj==bt1||obj==bt2||obj==bt3||obj==bt4||obj==bt5||obj==bt6||obj==bt7||obj== bt8||obj==bt9||obj==bt0){if(i==true)tf.setText(e.getActionCommand());elsetf.setText(tf.getText()+e.getActionCommand());i = false;}//小数点else if(obj==btPoint){if(i==false)tf.setText(tf.getText()+'.');}//实现开根号else if(obj==btSqrt){if(tf.getText().charAt(0)=='-'){tf.setText("函数输入无效");}elsetf.setText(Double.toString(ng.Math.sqrt(Double. parseDouble(tf.getText()))));i = true;}//实现倒数else if(obj==btCoun){if (tf.getText().charAt(0) == '0') {tf.setText("零不能求倒数");i = true;}else {String s = Double.toString(1 / Double.parseDouble(tf.getText()));foreNum = tf.getText();tf.setText(s);i = true;}}//实现+/-符号else if (obj == btSign) {boolean isNumber = true;String s = tf.getText();for (int m = 0; m< s.length(); m++)if (! (s.charAt(m) >= '0' && s.charAt(m) <='9' || s.charAt(m) =='.'||s.charAt(m) == '-')) {break;}if (isNumber == true) {//如果当前字符串首字母有-号,代表现在是个负数,再按下时,则将首符号去掉if (s.charAt(0) == '-') {tf.setText("");for (int m = 1; m< s.length(); m++) {char a = s.charAt(m);tf.setText(tf.getText() + a);}}//如果当前字符串第一个字符不是符号,则添加一个符号在首字母处elsetf.setText('-' + s);}}//实现%功能else if(obj==btMol){boolean isNumber = true;if(isNumber==true)tf.setText(String.valueOf(Double.parseDouble(tf.getText())/100));elsetf.setText("错误");}//实现符号运算else if(obj==btAdd||obj==btMinu||obj==btDiv||obj==btMult){if(i==false){currNum=tf.getText();if(currOpr=="+")tf.setText(String.valueOf(Double.parseDouble(foreNum)+Double.parseDouble(currN um)));else if(currOpr=="-")tf.setText(String.valueOf(Double.parseDouble(foreNum)-Double.parseDouble(currN um)));else if(currOpr=="*")tf.setText(String.valueOf(Double.parseDouble(foreNum)*Double.parseDouble(currN um)));else if(currOpr=="/"){if (Double.parseDouble(tf.getText()) == 0)tf.setText("除数不能为零");elsetf.setText(String.valueOf(Double.parseDouble(foreNum)/Double.parseDouble(currNum))) ;}}foreNum=tf.getText();tf.setText("");currOpr=e.getActionCommand();i = false;}//实现等号else if(obj==btEqual){currNum=tf.getText();if(currOpr=="+")tf.setText(String.valueOf(Double.parseDouble(foreNum)+Double.parseDouble(currN um)));else if(currOpr=="-")tf.setText(String.valueOf(Double.parseDouble(foreNum)-Double.parseDouble(currN um)));else if(currOpr=="*")tf.setText(String.valueOf(Double.parseDouble(foreNum)*Double.parseDouble(currN um)));else if(currOpr=="/"){if (Double.parseDouble(tf.getText()) == 0)tf.setText("除数不能为零");elsetf.setText(String.valueOf(Double.parseDouble(foreNum)/Double.parseDouble(currN um)));}currOpr=e.getActionCommand();i = true;}//实现Backspace功能else if(obj==btBk){String s = tf.getText();tf.setText("");for (int m = 0;m <s.length() - 1; m++) {char a = s.charAt(m);tf.setText(tf.getText() + a);i = true;}}//实现Ce功能else if (obj == btCe) {tf.setText("0.");}//实现C功能else if (obj == btCl) {foreNum=currNum="";tf.setText("0.");}//实现复制else if(obj==menuEditCopy){copy=tf.getText();}//实现粘贴else if (obj == menuEditPaste) {tf.setText(copy);}//实现帮助主题else if(obj == menuHelpAbout){ImageIcon icon = new ImageIcon("src//Icons//about1.jpg");JLabel label = new JLabel(icon);JOptionPane.showMessageDialog(f,label,"帮助主题",JOptionPane.PLAIN_MESSAGE);}}public static void main(String[] args) {// TODO自动生成方法存根try{UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());//UIManager统一管理}catch(Exception e) {e.printStackTrace();}Test t = new Test();t.init();}}class MyWinLis implements WindowListener{public void windowActivated(WindowEvent arg0) {// TODO自动生成方法存根}public void windowClosed(WindowEvent arg0) { // TODO自动生成方法存根}public void windowClosing(WindowEvent arg0) { // TODO自动生成方法存根System.exit(0);}public void windowDeactivated(WindowEvent arg0) { // TODO自动生成方法存根}public void windowDeiconified(WindowEvent arg0) { // TODO自动生成方法存根}public void windowIconified(WindowEvent arg0) { // TODO自动生成方法存根}public void windowOpened(WindowEvent arg0) { // TODO自动生成方法存根}}。

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