您的位置：360文档中心› java计算器源代码有注解

java计算器源代码有注解

合集下载

计算器JAVA源代码

计算器JAVA源代码

import java.awt.*;import javax.swing.*;import java.awt.Event.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class Calculation extends JFrame implements ActionListener {private JTextField result;JTextField fm;Double dm = 0d;public Calculation(){super("计算器");result = new JTextField("0",30);result.setBackground(Color.white);result.setHorizontalAlignment(JTextField.RIGHT);result.setEditable(false);JPanel resultpanel = new JPanel();resultpanel.add(result);fm = new JTextField(2);JButton b1= new JButton("Backspace");JButton b2= new JButton("CE");JButton b3= new JButton("C");JPanel ControalPanel = new JPanel();ControalPanel.setLayout(new GridLayout(1,4,2,2));ControalPanel.add(fm);ControalPanel.add(b1);ControalPanel.add(b2);ControalPanel.add(b3);b1.addActionListener(this);b2.addActionListener(this);b3.addActionListener(this);String dckey [] = {"MC","0","1","2","3","4","5","6","7","8","9","/","sqrt","MR","*","%","MS","-","1/x","M+","+/-" ,".","+","="};JPanel dckeypanel =new JPanel();dckeypanel.setLayout(new GridLayout(4,6,2,2));for(int i=0;i<24;i++){JButton b = new JButton(dckey[i]);dckeypanel.add(b);b.addActionListener(this);}Container ct = this.getContentPane();ct.setLayout(new BorderLayout());ct.add(resultpanel,BorderLayout.NORTH);ct.add(ControalPanel,BorderLayout.CENTER);ct.add(dckeypanel,BorderLayout.SOUTH);pack();setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}private boolean newDigital = true;private int optionvalue;private String operation = "";private Double d,d1,d2;public void actionPerformed(ActionEvent e){String s = (e.getActionCommand());String str = result.getText();if(s.equals("Backspace")){String s1 = result.getText();result.setText(s1.substring(0,s1.length()-1));}if(s.equals("CE")){result.setText("0");newDigital = true;}if(s.equals("C")){result.setText("0");optionvalue = 0;newDigital = true;}if(s.equals("0")||s.equals("1")||s.equals("2")||s.equals("3")||s.equals("4")||s.equals("5")||s.equal s("6")||s.equals("7")||s.equals("8")||s.equals("9")){if(!newDigital){result.setText(str+s);}else{result.setText(s);newDigital = false;}return;}if(s.equals(".")){if(result.getText().trim().startsWith("0")){result.setText("0.");newDigital = false;}else{result.setText(str+".");}return;}if(s.equals("+/-")){d = Double.parseDouble(str.trim());result.setText(String.valueOf((-d)));return;}if(s.equals("+")){d1 = Double.parseDouble(result.getText());optionvalue = 1;result.setText("");}if(s.equals("-")){d1 = Double.parseDouble(result.getText());optionvalue = 2;result.setText("");}if(s.equals("*")){d1 = Double.parseDouble(result.getText());optionvalue = 3;result.setText("");}if(s.equals("/")){d1 = Double.parseDouble(result.getText());optionvalue = 4;result.setText("");}if(s.equals("=")){d2 = Double.parseDouble(result.getText());switch(optionvalue){case 1:result.setText(String.valueOf(d1+d2));break;case 2:result.setText(String.valueOf(d1-d2));break;case 3:result.setText(String.valueOf(d1*d2));break;case 4:if(d2!=0){result.setText(String.valueOf(d1/d2));}else{result.setText("除数不能为零");return;}break;}operation = "";}if(s.equals("sqrt")){d = Double.parseDouble(result.getText().trim());if(d>=0){result.setText(String.valueOf((Math.sqrt(d))));}else{result.setText("除数不能为零");}}if(s.equals("1/x")){d = Double.parseDouble(result.getText().trim());if(str.equals("0")){result.setText("除数不能为零");}else{result.setText(String.valueOf((1/d)));}}if(s.equals("%")){result.setText(String.valueOf((Double.parseDouble(str)/100))); }if(s.equals("MC")){fm.setText("");dm=0d;newDigital = true;}if(s.equals("MR")){if(fm.getText().trim()!=""){result.setText(""+dm);}}if(s.equals("MS")){dm = Double.parseDouble(result.getText().trim());fm.setText("M");}if(s.equals("M+")){dm = dm+Double.parseDouble(result.getText().trim());}}public static void main (String [] args){ new Calculation();}}。

java计算器程序代码及文档(带异常处理,括号等。注释详细易懂)

java计算器程序代码及文档(带异常处理,括号等。注释详细易懂)

四则运算计算器设计说明书一．设计目标本次计算器的程序设计，通过使用JA V A中的AWT包和Swing包的类库设计图形界面的计算器。

此计算器能够完成加减乘除的四则混合运算。

利用面向对象程序设计的思想，将各个组件的事件响应分别用不同的方式表达出来，并且使用了图形界面中的事件委托机制来处理事件响应。

二．设计流程1. 分析该计算器需要完成的功能。

用户能够完成添加括号和负号的四则混合运算,并且计算器能够自动识别运算符的优先级，根据用户输入的运算表达式，自动计算出相应的结果。

同时还完成了计算器中C按钮清屏功能和Backspace退格键。

2. 考虑异常处理。

（1）当输入的表达式中出现除零的操作，显示框将显示“Infinity(无穷大)”。

（2）当输入的表达式错误时，将弹出提示框显示“表达式错误请重新输入”（3）当计算器的显示文本框里为没有输入内容时直接点击等号按钮，将弹出提示框显示“对不起，您没有任何输入，请重新输入：”。

（4）当第一次输入乘号键,除号键，右括号，小数点，求余键，等号键，ce 键，Backspace键时提示错误。

4. 考虑数据的处理目标计算表达式通过点击计算器界面上的按钮进行输入，当按下等号之后，计算器通过调用JA V A中script这个包中的相关类和方法来实现数据的处理。

5. 编码实现计算器的功能。

（1）新建相关的文件。

（2）引入JA V A中相关的包。

（3）新建类Jsq，并继承了类Frame，而且实现了接口ActionListener（4）定义相关的变量，创建相关组件，并对组件的属性进行设置。

（5）对所创建的组件进行布局，完成界面的实现。

（6）为各个组件添加事件监听器。

（7）重写事件接口ActionListener的方法public void actionPerformed(ActionEvent e)。

（8）为各个组件编写事件代码，完成每个按钮的不同功能。

三．测试过程的截图1. 程序初始运行界面2运算测试3.混合运算测试：异常处理测试：1.输入错误的表达式2、除数为0时：四．设计结果此计算器以完成设计，所有功能都以实现，并达到了预想的设计目标。

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计算器源代码(已成功运行)汇总

Java计算器源代码(已成功运行)汇总
Java计算器程序代码
以下为代码：
importjavax.swing.*;
importjava.awt.*;
importjava.awt.event.*;
public class Calculator extends JFrame implements ActionListener
{
private booleandotExist, operated, equaled; //帮助运算的布尔变量
private double storedNumber; //目前的结果private char lastOperator; //表示上一运算符private JTextField operation; //结果栏
private JButton dot, plus, minus, multi, div, sqrt, equal, changePN, clear; //运算符
private JButton[] numbers; //数字
//构造者
public Calculator(
{
setTitle("Calculator";
//初始化变量
dotExist = false; //表示当前的数是否有小数点
operated = false; //表示任意运算符是否被按下equaled = false; //表示等号是否被按下storedNumber = 0;
else if (lastOperator == 's' storedNumber = Math.sqrt(currentNumber; else if (lastOperator == '=' && equaled storedNumber = currentNumber; operation.setText("" + storedNumber; operated = true; lastOperator = operator; } //快捷使用GridBagLayout的方法private void addComponent(GridBagLayout layout, Component component, int row, int col, int width, int height { GridBagConstraints constraints=new GridBagConstraints(; constraints.fill = GridBagConstraints.BOTH; constraints.insets = new Insets(10, 2, 10, 2; constraints.weightx = 100; constraints.weighty = 100; constraints.gridx = col; constraints.gridy = row; constraints.gridwidth = width; constraints.gridheight = height; layout.setConstraints(component, constraints;

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简单计算器--代码

java简单计算器--代码
JOptionPane.ERROR_MESSAGE);return;}
}
}
if(act.equals("sqrt")){try{float num=(float)Math.sqrt(Float.parseFloat(t.getText()));
t.setText(String.valueOf(num));can=true;return;
JOptionPane.ERROR_MESSAGE);return;}
}
}
public float cacu(float a,char c,float b){
float sum;
switch(c){
case '+':sum=a+b;break;
case '-':sum=a-b;break;
t.setText(String.valueOf(num));can=true;return;
}catch(NumberFormatException e1){JOptionPane.showMessageDialog(null, "输入格式错误！", "警告！",
JOptionPane.ERROR_MESSAGE);return;}
p1.add(backButton);
p1.add(clearButton);
backButton.addActionListener(this);
clearButton.addActionListener(this);
p2.add(t);
p2.add(p1);
p2.setBackground(Color.black);

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计算器程序带详细注释

java计算器程序带详细注释

1.import java.awt.*;2.import java.awt.event.*;3.import javax.swing.*;4.5./**比较完整的计算器6. * @author zxsong0077. */8.public class Calculator extends JFrame {9. private static final long serialVersionUID = 428884538177985224L;10. private JButton[] buttons = new JButton[20];// 按钮11. private JTextField textField = new JTextField("0");// 显示器12. private char symbol;// 存放符号13. private double tempvalues;// 临时数值14. private double values;// 结果15. private boolean isDone = false;// 是否计算完成,并清空显示器16.17. public static void main(String[] args) {// main18. new Calculator();19. }20.21. public Calculator() {// 构造22. this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 点按钮关闭23. this.setTitle("计算器");//设置标题24. this.setResizable(false); // 禁止最大化25. this.setSize(240, 200);//设置窗口大小26. this.setLocationRelativeTo(this.getOwner());//设置居中显示27. textField.setBounds(5, 5, this.getWidth() - 15, 25);//设置文本框位置28. JLayeredPane pane = this.getLayeredPane();// 获取默认面板29. pane.add(textField);//添加文本框到面板30. textField.setHorizontalAlignment(JTextField.RIGHT);// 文本框右对齐31. textField.setFont(new Font("宋体", 1, 20));// 设置文本框字体加粗32. textField.addKeyListener(new KeyAdapter() {// 文本框键盘事件33.@Override34. public void keyTyped(KeyEvent e) {35. if (e.getKeyChar() < '0' || e.getKeyChar() > '9'){36. e.setKeyChar((char) 0);// 拦截输入的非数字37. Toolkit.getDefaultToolkit().beep();// 发出提示声音38. }39. }40. });41. JLayeredPane p1 = new JLayeredPane();// 新建面板42. p1.setBounds(5, 35, this.getWidth() - 15, this.getHeight() - 70);// 面板位置43. pane.add(p1);// 添加面板到主面板44. GridLayout grid = new GridLayout(5, 4);// 新建布局45. p1.setLayout(grid);// 添加布局46. grid.setVgap(5);// 设置布局行间距47. grid.setHgap(5);// 设置布局列间距48. String[] arr = { "←", "CE", "C", "+/-", "7", "8", "9", "/", "4","5",49. "6", "*", "1", "2", "3", "-", "0", ".", "=", "+" };50. for (int i = 0; i < buttons.length; i++) {51. buttons[i] = new JButton(arr[i]);// 新建按钮,并添加文字52. p1.add(buttons[i]);// 添加按钮到面板53. buttons[i].addActionListener(new CalculatorListener(i));// 添加事件54. }55. this.setVisible(true);// 设置可见56. }57.58. private class CalculatorListener implements ActionListener {// 按钮事件59. private int index;//按钮数组索引60.61. public CalculatorListener(int index) {62. this.index = index;63. }64.65.@Override66. public void actionPerformed(ActionEvent e) {67. String textShow = textField.getText();68. switch (index) {69. default: {// 数字0-970. if (textShow.equals("0")) {//只有1个071. textField.setText(buttons[index].getText());//就直接覆盖,不追加72. } else {//有多个数字73. if (isDone) {//是否清空?74. textField.setText(buttons[index].getText());//直接覆盖75. isDone = false;76. } else//否则追加到尾部77. textField.setText(textShow + buttons[index].getText());78. }79. break;80. }81. case 17: {// 小数点82. if (isDone) {//是否清空?83. textField.setText("0.");//清空84. isDone = false;85. break;86. }87. if (textShow.indexOf('.') == -1) {//保证只有一个小数点88. textField.setText(textShow + ".");89. } else {//已经有小数点90. Toolkit.getDefaultToolkit().beep();//发出提示声音91. }92. break;93. }95. if (textShow.length() <= 1)//只有一位就不用后退96. textField.setText("0");97. else//后退,去掉尾部的数字98. textField.setText(textShow.substring(0,99. textShow.length() - 1));100. break;101. }102. case 3: {// 正负103. if (textShow.startsWith("-"))104. textField.setText(textShow.replace("-", "")); 105. else if (textShow.startsWith("+"))106. textField.setText(textShow.replace("+", "-")); 107. else108. textField.setText("-" + textShow);109. if (isDone) //如果计算完成110. values= parseDouble(textField.getText());//改结果的符号111. else112. tempvalues = parseDouble(textField.getText());//改临时值符号113. break;114. }115. case 2: {// C全部归零116. textField.setText("0");//清空显示器117. symbol = 0;//清空符号118. values = 0;//清空计算的值119. tempvalues = 0;//清空临时值120. isDone = false;121. break;122. }123. case 1: {// CE归零124. textField.setText("0");//只清空显示器125. break;126. }128. if (!isDone) {129. tempvalues = parseDouble(textField.getText()); 130. isDone = true;131. getValue();//计算并显示132. }133. symbol = '+';134. break;135. }136. case 15: {// 减137. if (!isDone) {//还没计算?138. tempvalues = parseDouble(textField.getText()); 139. isDone = true;140. getValue();//计算并显示141. }142. symbol = '-';143. break;144. }145. case 11: {// 乘146. if (!isDone) {//还没计算?147. tempvalues = parseDouble(textField.getText()); 148. isDone = true;149. getValue();//计算并显示150. }151. symbol = '*';152. break;153. }154. case 7: {// 除155. if (!isDone) {//还没计算?156. tempvalues = parseDouble(textField.getText()); 157. isDone = true;158. getValue();//计算并显示159. }160. symbol = '/';161. break;162. }163. case 18: {// 等于164. if (!isDone) {//还没计算?165. tempvalues = parseDouble(textField.getText()); 166. isDone = true;167. }168. getValue();//计算并显示169. break;170. }171. }172.173. }174. }175.176. private double parseDouble(String str) {//字符串转double,一起try 177. double d = 0;178. try {179. d = Double.parseDouble(str);180. } catch (Exception e) {181. Toolkit.getDefaultToolkit().beep();// 异常,发出提示声音182. }183. return d;184. }185.186. private void getValue() {// 判断符号来计算结果187. if (symbol == '+')//加188. values += tempvalues;189. else if (symbol == '-')//减190. values -= tempvalues;191. else if (symbol == '*')//乘192. values *= tempvalues;193. else if (symbol == '/')//除194. values /= tempvalues;195. else if (symbol == 0)//没有运算符196. values = tempvalues;197. if ((long) values == values)// 去掉小数位为0的,结果显示到文本框198. textField.setText((long) values + "");199. else200. textField.setText(values + "");201. }202.}。

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;} }。

java计算器源代码

java计算器源代码

package计算器;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;import ;public class Counter1 extends JFrame implements ActionListener { public static final int DEF_DIV_SCALE = 10; //默认的精度private JMenuBar jmBar = new JMenuBar(); // 菜单条private JMenu edit = new JMenu("编辑(E)");private JMenu find = new JMenu("查看(V)");private JMenu help = new JMenu("帮助(H)");// 创建JPanel便于管理private JPanel panTxt = new JPanel();private JPanel panBack = new JPanel();private JPanel panMen = new JPanel();private JPanel panNum = new JPanel();// 创建文本域private JTextField txt = new JTextField();// 创建文本标签private JLabel jlm = new JLabel();private boolean flag = false; // 是否可以消除文本private double a = 0; // 数字a的值private double b = 0; // 数字b的值private double result = 0; // 两个数字运算的结果private String sign = ""; // 标记运算法则private double m = 0; // 暂时储存数据// 创建按钮private NewButton jbBack = new NewButton("Backspace", Color.RED);private NewButton jbCE = new NewButton("CE", Color.RED);private NewButton jbC = new NewButton("C", Color.RED);private NewButton jbMC = new NewButton("MC", Color.RED);private NewButton jbMR = new NewButton("MR", Color.RED);private NewButton jbMS = new NewButton("MS", Color.RED);private NewButton jbM = new NewButton("M+", Color.RED);public Counter1() {setSize(260, 260);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setLocationRelativeTo(null);setLayout(null);setJMenuBar(jmBar);setTitle("计算器");setResizable(false);init();// Container contentPane = getContentPane();// Controller c = new Controller(this);// contentPane.addKeyListener(c);}private void init() {// 设置第一个JPanel里面的内容panTxt.setSize(230, 20);panTxt.setLocation(15, 5);// panTxt.setBorder(BorderFactory.createLineBorder(Color.RED));panTxt.setLayout(new BorderLayout()); // 设置布局管理器txt.setHorizontalAlignment(JTextField.RIGHT); // 使光标定位在右边txt.setBorder(BorderFactory.createLoweredBevelBorder()); // 设置边框凹下去txt.setEditable(false); // 设置是否可以编辑txt.setBackground(Color.WHITE);// txt.setEnabled(true); //设置是否激活// txt.setFocusable(false); // 设置是否可以获得焦点（显示光标）txt.setText("0");add(panTxt);panTxt.add(txt);Controller c = new Controller(this);txt.addKeyListener(c);// 设置第二个JPanel里面的内容panBack.setSize(190, 25);panBack.setLocation(52, 35);// 画出边框便于查看// panBack.setBorder(BorderFactory.createLineBorder(Color.RED));GridLayout layPanBack = new GridLayout(); // 创建布局管理器layPanBack.setHgap(5); // 设置布局管理器的边距panBack.setLayout(layPanBack); // 设置布局管理器// 添加按钮jbBack.setFont(new Font("宋体", 0, 12));panBack.add(jbBack);panBack.add(jbCE);panBack.add(jbC);add(panBack);// 设置第三个JPanel里面的内容panMen.setSize(40, 140);panMen.setLocation(5, 65);GridLayout layPanMen = new GridLayout(4, 1); // 创建布局管理器layPanMen.setVgap(5); // 设置布局管理器的边距panMen.setLayout(layPanMen);// panMen.setBorder(BorderFactory.createLineBorder(Color.RED));panMen.add(jbMC);panMen.add(jbMR);panMen.add(jbMS);panMen.add(jbM);add(panMen);// 设置第四个JPanel里面的内容panNum.setSize(200, 140);panNum.setLocation(50, 65);// panNum.setBorder(BorderFactory.createLineBorder(Color.RED));add(panNum);GridLayout layPanNum = new GridLayout(4, 5); // 创建布局管理器panNum.setLayout(layPanNum);newButtonNum();// 添加菜单项jmBar.add(edit);jmBar.add(find);jmBar.add(help);// 设置文本标签的属性和添加文本标签jlm.setBorder(BorderFactory.createBevelBorder(1));jlm.setSize(25, 25);jlm.setLocation(15, 35);add(jlm);}public void newButtonNum() {NewButton jb7 = new NewButton("7", Color.BLUE);NewButton jb8 = new NewButton("8", Color.BLUE);NewButton jb9 = new NewButton("9", Color.BLUE);NewButton jbDivide = new NewButton("/", Color.RED);NewButton jbSqrt = new NewButton("sqrt", Color.BLUE);NewButton jb4 = new NewButton("4", Color.BLUE);NewButton jb5 = new NewButton("5", Color.BLUE);NewButton jb6 = new NewButton("6", Color.BLUE);NewButton jbRide = new NewButton("*", Color.RED);NewButton jbPer = new NewButton("%", Color.BLUE);NewButton jb1 = new NewButton("1", Color.BLUE);NewButton jb2 = new NewButton("2", Color.BLUE);NewButton jb3 = new NewButton("3", Color.BLUE);NewButton jbCut = new NewButton("-", Color.RED);NewButton jbReciprocal = new NewButton("1/x", Color.BLUE);NewButton jb0 = new NewButton("0", Color.BLUE);NewButton jbMinus = new NewButton("+/-", Color.BLUE);NewButton jbDot = new NewButton(".", Color.BLUE);。

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();}}。

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。

Java计算器源码

Java计算器源码

计算器本计算器有显示过程和不显示过程两种功能，其中不显示过程为普通计算器，类似于windows自带的计算器；显示过程的，可以显示预算过程，其中包含所需应用的部分函数，以及格式化功能（最左上角，第一个键格式化，然后输入需要格式化的数位，然后点第二个数，显示格式化结果），当一次运算结束后，会在右边自动显示运算过程，并且运算过程处有保存，复制粘贴清除功能。

代码如下：主类：import ZF.*;public class JiSuanQi {public static void main(String[] args) {Calculator c = new Calculator("计算器");}}包ZF中的类：Calculator类package ZF;/*** 计算器布局界面*/import java.io.*;import java.awt.*;import javax.swing.*;import java.awt.event.*;public class Calculator extends JFrame implements ActionListener {static int xg = 1;// 用于判断是否显示过程,初始状态为显示JSplitPane jsp1, jsp2, jsp3;static JTextField jtf;// 文本框static JTextArea jta;// 保存等的历史文本区public static String zc;// 用来暂时存储数字，实现第一个菜单选项JScrollPane JS;// 专门用于给文本区提供滚动条public static FileDialog load, save;// 声明引入对话框BufferedReader in;//FileReader reader;//JP1 jp1;JP2 jp2;JP3 jp3;JP4 jp4;JP5 jp5;// 菜单条JMenuBar mb;JMenu m0, m1, m2;JMenuItem m01, m02, m03, m04, m11, m12, m21, m22;public Calculator(String s) {super(s);Container con = getContentPane();// 桌面jp1 = new JP1();jp2 = new JP2();jp3 = new JP3();jp4 = new JP4();jp5 = new JP5();jta = new JTextArea();jta.setEditable(false);JS = new JScrollPane(jta);jsp1 = new JSplitPane(JSplitPane.VERTICAL_SPLIT, false, jp1, jp2);jsp2 = new JSplitPane(JSplitPane.VERTICAL_SPLIT, false, jp3, JS);jsp3 = new JSplitPane(JSplitPane.VERTICAL_SPLIT, false, jp4, jp5);jtf = new JTextField();jtf.setText(String.valueOf(0));jtf.setEditable(false);jtf.setBackground(Color.white);load = new FileDialog(this, "读取历史运算过程", FileDialog.LOAD);load.setVisible(false);load.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {load.setVisible(false);}});save = new FileDialog(this, "保存历史运算过程", FileDialog.SAVE); save.setVisible(false);save.addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {save.setVisible(false);}});// 菜单条mb = new JMenuBar();m0 = new JMenu("编辑");m1 = new JMenu("查看");m2 = new JMenu("帮助");m01 = new JMenuItem("复制");m02 = new JMenuItem("粘贴");m03 = new JMenuItem("读取");m04 = new JMenuItem("关闭");m01.addActionListener(this);m02.addActionListener(this);m03.addActionListener(this);m04.addActionListener(this);m11 = new JMenuItem("不显过程");m12 = new JMenuItem("显示过程");m11.addActionListener(this);m12.addActionListener(this);m21 = new JMenuItem("帮助主题");m22 = new JMenuItem("关于计算器");m21.addActionListener(this);m22.addActionListener(this);m0.add(m01);m0.add(m02);m0.add(m03);m0.add(m04);m1.add(m11);m1.add(m12);m2.add(m21);m2.addSeparator();m2.add(m22);mb.add(m0);mb.add(m1);mb.add(m2);setJMenuBar(mb);con.add(jtf, BorderLayout.NORTH);con.add(jsp1, BorderLayout.CENTER);con.add(jsp2, BorderLayout.EAST);con.add(jsp3, BorderLayout.WEST);setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);setBounds(100, 100, 800, 260);setResizable(false);setVisible(true);validate();}public void actionPerformed(ActionEvent e) {if (!jtf.getText().equals("error")) {if (e.getSource() == m01) {zc = jtf.getText();} else if (e.getSource() == m02) {if (zc != null) {if (xg == 1) {if (jtf.getText().equals("0"))jtf.setText(zc);elsejtf.setText(jtf.getText() + zc);} elsejtf.setText(zc);}}}if (e.getSource() == m03) { //读取文件Calculator.load.setVisible(true);Calculator.jta.setText(null);String s;if(Calculator.load.getFile()!=null){try{File file=new File(Calculator.load.getDirectory(),Calculator.load.getFile());reader=new FileReader(file);in=new BufferedReader(reader);while((s=in.readLine())!=null){Calculator.jta.append(s+'\n');}in.close();reader.close();}catch(IOException e2){Calculator.jta.append("读取错误");} }} else if (e.getSource() == m04) {System.exit(0);} else if (e.getSource() == m11) {// 换窗体大小，同时换规则setSize(320, 260);remove(jsp2);remove(jsp3);JP2.sf = 0;jtf.setText(String.valueOf(0));xg = 0;// 改变菜单选项的可选性m03.setEnabled(false);m04.setEnabled(false);// 换对齐方式JP2.sf = 0;jtf.setEditable(false);jtf.setBackground(Color.white);jtf.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);validate();} else if (e.getSource() == m12) {setSize(800, 260);add(jsp2, BorderLayout.EAST);add(jsp3, BorderLayout.WEST);JP2.sf = 0;jtf.setText(String.valueOf(0));xg = 1;m03.setEnabled(true);m04.setEnabled(true);JP2.eg = 0;jtf.setEditable(false);jtf.setBackground(Color.white);jtf.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);validate();} else if (e.getSource() == m21) {JOptionPane.showMessageDialog(this,"本计算器以模仿Windows系统自带计算器为主，详情请参照系统计算器“帮助主题”。

  1. 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
java 计算器源代码-有注解
import java.awt.*; import java.awt.event.*;
import javax.swing.*; public class Calculotor extends Frame { //声明三个面板的布局 GridLayout gl1,gl2,gl3; Panel p0,p1,p2,p3; JTextField tf1; TextField tf2; Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b 18,b19,b20,b21,b22,b23,b24,b25,b26; StringBuffer str;//显示屏所显示的字符串 double x,y;//x 和 y 都是运算数 int z;//Z 表 示 单 击 了 那 一 个 运 算 符 .0 表 示 &quot;+&quot;,1 表 示 &quot;-&quot;,2 表示&quot;*&quot;,3 表示&quot;/&quot;
//添加面板 p3 中的组件并设置其在框架中的位置和大小 p3.setLayout(gl3);//设置 p3 的布局 p3.add(b7); p3.add(b8); p3.add(b9); p3.add(b10); p3.add(b11); p3.add(b12); p3.add(b13); p3.add(b14); p3.add(b15); p3.add(b16); p3.add(b17); p3.add(b18); p3.add(b19); p3.add(b20); p3.add(b21); p3.add(b22); p3.add(b23); p3.add(b24); p3.add(b25); p3.add(b26);
tf1.setText(&quot;&quot;+(-x)); } else if(e2.getSource()==b25)//单击加号按钮获得 x 的值和 z 的值并清空 y 的值 { x=Double.parseDouble(tf1.getText().trim()); str.setLength(0);//清空缓冲区以便接收新的另一个运算数 y=0d; z=0; } else if(e2.getSource()==b20)//单击减号按钮获得 x 的值和 z 的值并清空 y 的值 { x=Double.parseDouble(tf1.getText().trim()); str.setLength(0); y=0d; z=1; } else if(e2.getSource()==b15)//单击乘号按钮获得 x 的值和 z 的值并清
b2=new Button(&quot;C&quot;); b2.setForeground(Color.red); b2.addActionListener(new Bt()); b3=new Button(&quot;MC&quot;); b3.setForeground(Color.red); b3.addActionListener(new Bt()); b4=new Button(&quot;MR&quot;); b4.setForeground(Color.red); b4.addActionListener(new Bt()); b5=new Button(&quot;MS&quot;); b5.setForeground(Color.red); b5.addActionListener(new Bt()); b6=new Button(&quot;M+&quot;); b6.setForeground(Color.red); b6.addActionListener(new Bt()); b7=new Button(&quot;7&quot;); b7.setForeground(Color.blue); b7.addActionListener(new Bt()); b8=new Button(&quot;8&quot;); b8.setForeground(Color.blue); b8.addActionListener(new Bt()); b9=new Button(&quot;9&quot;);
}
//构造监听器 class Bt implements ActionListener { public void actionPerformed(ActionEvent e2) { try{
if(e2.getSource()==b1)//选择&quot;CE&quot;清零 { tf1.setText(&quot;0&quot;);//把显示屏清零 str.setLength(0);//清空字符串缓冲区以准备接收新的输入运算数 } else if(e2.getSource()==b2)//选择&quot;C&quot;清零 { tf1.setText(&quot;0&quot;);//把显示屏清零 str.setLength(0); } else if(e2.getSource()==b23)//单击&quot;+/-&quot;选择输入的运算数是 正数还是负数 { x=Double.parseDouble(tf1.getText().trim());
static double m;//记忆的数字 public Calculotor() { gl1=new GridLayout(1,4,10,0);//实例化三个面板的布局 gl2=new GridLayout(4,1,0,15); gl3=new GridLayout(4,5,10,15);
tf1=new JTextField(27);//显示屏 tf1.setHorizontalAlignment(JTextField.RIGHT); tf1.setEnabled(false); tf1.setText(&quot;0&quot;); tf2=new TextField(10);//显示记忆的索引值 tf2.setEditable(false); //实例化所有按钮、设置其前景色并注册监听器 b0=new Button(&quot;Backspace&quot;); b0.setForeground(Color.red); b0.addActionListener(new Bt()); b1=new Button(&quot;CE&quot;); b1.setForeground(Color.red); b1.addActionListener(new Bt());
b16.addActionListener(new Bt()); b17=new Button(&quot;1&quot;); b17.setForeground(Color.blue); b17.addActionListener(new Bt()); b18=new Button(&quot;2&quot;); b18.setForeground(Color.blue); b18.addActionListener(new Bt()); b19=new Button(&quot;3&quot;); b19.setForeground(Color.blue); b19.addActionListener(new Bt()); b20=new Button(&quot;-&quot;); b20.setForeground(Color.red); b20.addActionListener(new Bt()); b21=new Button(&quot;1/X&quot;); b21.setForeground(Color.blue); b21.addActionListener(new Bt()); b22=new Button(&quot;0&quot;); b22.setFortionListener(new Bt()); b23=new Button(&quot;+/-&quot;); b23.setForeground(Color.blue); b23.addActionListener(new Bt()); b24=new Button(&quot;.&quot;); b24.setForeground(Color.blue); b24.addActionListener(new Bt()); b25=new Button(&quot;+&quot;); b25.setForeground(Color.red); b25.addActionListener(new Bt()); b26=new Button(&quot;=&quot;); b26.setForeground(Color.red); b26.addActionListener(new Bt());
//实例化四个面板 p0=new Panel(); p1=new Panel(); p2=new Panel(); p3=new Panel();
//创建一个空字符串缓冲区 str=new StringBuffer();
//添加面板 p0 中的组件和设置其在框架中的位置和大小 p0.add(tf1); p0.setBounds(10,25,300,40); //添加面板 p1 中的组件和设置其在框架中的位置和大小 p1.setLayout(gl1); p1.add(tf2); p1.add(b0); p1.add(b1); p1.add(b2); p1.setBounds(10,65,300,25); //添加面板 p2 中的组件并设置其的框架中的位置和大小 p2.setLayout(gl2); p2.add(b3); p2.add(b4); p2.add(b5); p2.add(b6); p2.setBounds(10,110,40,150);
相关文档
最新文档