java计算器程序代码

java课程设计专业：计算机应用技术班级：0901学号：**********设计人：谢荣芳指导教师：兰方鹏一、JA V A源代码import java.awt.*;import java.awt.event.*;import java.io.*;import javax.swing.*;import javax.swing.JTextArea;import java.applet.*;import java.awt.datatransfer.*;public class myzy{ public static void main(String args[]){ MyFrame win=new MyFrame("java设计的windows窗口");}}//复数运算窗口class Complex extends Frame implements ActionListener{ TextField txt1,txt2,txt3,txt4,txt5,txt6;//声明对象Button button6,button7,button8,button9;Label label2;Box box1,box2,box3,box4,box5,box6,box7,box8,box9;//声明两个行型盒式容器box1,box2// 一个列型盒式容器box3Complex(){setLayout(new FlowLayout());txt1=new TextField(3);//对象实例化txt2=new TextField(3);txt3=new TextField(3);txt4=new TextField(3);txt5=new TextField(3);txt6=new TextField(3);label2=new Label(" ");button6=new Button("加");button7=new Button("减");button8=new Button("乘");button9=new Button("除");box1=Box.createHorizontalBox();box1.add(txt1);box1.add(new Label("+"));box1.add(txt3);box1.add(new Label("i"));box4=Box.createHorizontalBox();box4.add(label2);box5=Box.createHorizontalBox();box5.add(txt2);box5.add(new Label("+"));box5.add(txt4);box5.add(new Label("i"));box6=Box.createHorizontalBox();box6.add(new Label("="));box7=Box.createHorizontalBox();box7.add(txt5);box7.add(new Label("+"));box7.add(txt6);box7.add(new Label("i"));box8=Box.createVerticalBox();box8.add(box1);box8.add(Box.createV erticalStrut(3));box8.add(box4);box8.add(Box.createV erticalStrut(3));box8.add(box5);box8.add(Box.createV erticalStrut(3));box8.add(box6);box8.add(Box.createVerticalStrut(3));box8.add(box7);box2=Box.createVerticalBox();box2.add(button6);box2.add(Box.createV erticalStrut(3));box2.add(button7);box2.add(Box.createV erticalStrut(3));box2.add(button8);box2.add(Box.createV erticalStrut(3));box2.add(button9);box9=Box.createHorizontalBox();box9.add(box2);box9.add(Box.createV erticalStrut(35));box9.add(box8);add(box9);button6.addActionListener(this);//对象添加监视器button7.addActionListener(this);button8.addActionListener(this);button9.addActionListener(this);setSize(200,200);setVisible(true);setResizable(false);addWindowListener(new WindowAdapter()//为窗口添加监视器，保证窗口正常关闭{ public void windowClosing(WindowEvent e){ System.exit(0);}});validate();}public void actionPerformed(ActionEvent e)//实现接口方法{ double m1,m2;if(e.getSource()==button6) // 实现复数相加{ double a,b,c,d;try{ a=Double.parseDouble(txt1.getText());c=Double.parseDouble(txt2.getText());b=Double.parseDouble(txt3.getText());d=Double.parseDouble(txt4.getText());m1=a+c;m2=b+d;txt5.setText(String.valueOf(m1));txt6.setText(String.valueOf(m2));label2.setText("+");}catch(NumberFormatException ee){ txt6.setText("请输入数字字符");} }else if(e.getSource()==button7) //实现复数相减{ double a,b,c,d;try{ a=Double.parseDouble(txt1.getText());c=Double.parseDouble(txt2.getText());b=Double.parseDouble(txt3.getText());d=Double.parseDouble(txt4.getText());m1=a-c;m2=b-d;txt5.setText(String.valueOf(m1));txt6.setText(String.valueOf(m2));label2.setText("-");}catch(NumberFormatException ee){ txt6.setText("请输入数字字符");} }else if(e.getSource()==button8) //实现复数相乘{ double a,b,c,d;try{ a=Double.parseDouble(txt1.getText());c=Double.parseDouble(txt2.getText());b=Double.parseDouble(txt3.getText());d=Double.parseDouble(txt4.getText());m1=a*c-b*d;m2=a*d+b*c;txt5.setText(String.valueOf(m1));txt6.setText(String.valueOf(m2));label2.setText("*");}catch(NumberFormatException ee){ txt6.setText("请输入数字字符");}}if(e.getSource()==button9) //实现复数相除{ double a,b,c,d;try{ a=Double.parseDouble(txt1.getText());c=Double.parseDouble(txt2.getText());b=Double.parseDouble(txt3.getText());d=Double.parseDouble(txt4.getText());m1=(a*c+b*d)/(c*c+d*d);m2=(b*c-a*d)/(c*c+d*d);txt5.setText(String.valueOf(m1));txt6.setText(String.valueOf(m2));label2.setText("/");}catch(NumberFormatException ee){ txt6.setText("请输入数字字符");}}validate();}}//计算器窗口class CalculatorFrame extends Frame implements ActionListener{ TextField text2,text3,text4;//声明对象Button button1,button2,button3,button4,button5;Label label,label1;Box baseBox1,baseBox2,baseBox;//声明两个行型盒式容器baseBox1,baseBox2,一个列型盒式容器,baseBoxCalculatorFrame(){setLayout(new FlowLayout());text2=new TextField(10);//为对象分配内存text3=new TextField(10);text4=new TextField(10);label=new Label(" ");label1=new Label("=");label.setBackground(Color.yellow);label1.setBackground(Color.green);button1=new Button("+");button2=new Button("-");button3=new Button("*");button4=new Button("/");button5=new Button("复数运算");baseBox1=Box.createHorizontalBox();//添加的组件之间插入水平支撑控制组件之间距离baseBox1.add(Box.createHorizontalStrut(10));baseBox1.add(text2);baseBox1.add(Box.createHorizontalStrut(10));baseBox1.add(label);baseBox1.add(Box.createHorizontalStrut(10));baseBox1.add(text3);baseBox1.add(Box.createHorizontalStrut(10));baseBox1.add(label1);baseBox1.add(Box.createHorizontalStrut(10));baseBox1.add(text4);baseBox1.add(Box.createHorizontalStrut(10));baseBox2=Box.createHorizontalBox();//添加的组件之间插入垂直支撑控制组件之间距离baseBox2.add(Box.createHorizontalStrut(10));baseBox2.add(button1);baseBox2.add(Box.createHorizontalStrut(10));baseBox2.add(button2);baseBox2.add(Box.createHorizontalStrut(10));baseBox2.add(button3);baseBox2.add(Box.createHorizontalStrut(10));baseBox2.add(button4);baseBox2.add(Box.createHorizontalStrut(10));baseBox2.add(button5);baseBox2.add(Box.createHorizontalStrut(10));baseBox =Box.createV erticalBox();baseBox.add(Box.createVerticalStrut(10));baseBox.add(baseBox1);baseBox.add(Box.createVerticalStrut(10));baseBox.add(baseBox2);baseBox.add(Box.createVerticalStrut(10));add(baseBox);button1.addActionListener(this);//对象添加监视器button2.addActionListener(this);button3.addActionListener(this);button4.addActionListener(this);button5.addActionListener(this);setBounds(300,300,360,120);setVisible(true);setResizable(false);addWindowListener (new WindowAdapter()//增加适配器使窗口正常关闭{ public void windowClosing(WindowEvent e){System.exit(0);}});validate();}public void actionPerformed(ActionEvent e)//实现接口方法{ double n;if(e.getSource()==button1)//实现加法运算{ double n1,n2;try{ n1=Double.parseDouble(text2.getText());n2=Double.parseDouble(text3.getText());n=n1+n2;text4.setText(String.valueOf(n));label.setText("+");}catch(NumberFormatException ee){ text4.setText("请输入数字字符");}}else if(e.getSource()==button2)//实现减法运算{ double n1,n2;try{ n1=Double.parseDouble(text2.getText());n2=Double.parseDouble(text3.getText());n=n1-n2;text4.setText(String.valueOf(n));label.setText("-");}catch(NumberFormatException ee){ text4.setText("请输入数字字符");}}else if(e.getSource()==button3)//实现乘法运算{ double n1,n2;try{ n1=Double.parseDouble(text2.getText());n2=Double.parseDouble(text3.getText());n=n1*n2;text4.setText(String.valueOf(n));label.setText("*");}catch(NumberFormatException ee){ text4.setText("请输入数字字符");}}else if(e.getSource()==button4)//实现除法运算{ double n1,n2;try{ n1=Double.parseDouble(text2.getText());n2=Double.parseDouble(text3.getText());n=n1/n2;text4.setText(String.valueOf(n));label.setText("/");}catch(NumberFormatException ee){ text4.setText("请输入数字字符");}}else if(e.getSource()==button5)//实现复数运算{Complex fushu=new Complex();fushu.setTitle("复数运算");//设置窗口标题toFront();}validate();//保证组件正常显示}}//标准的windows窗口class MyFrame extends Frame implements ActionListener,ItemListener{ MenuBar menubar;//声明对象Menu menu1,menu2,menu3;MenuItem item1,item2,item3,item4,item5,item6,item7,item8;Clipboard clipboard=null; //声明一个剪切板对象TextArea text,text1;BufferedReader in;FileReader file_reader;BufferedWriter out;FileWriter tofile;FileDialog filedialog_save,filedialog_load;Choice list;JTextArea text0;MyFrame(String s){ setTitle(s);//设置窗口标题Toolkit tool=getToolkit();Dimension dim=tool.getScreenSize();setBounds(100,100,dim.width/2,dim.height/2);//设置窗口出现的初始位置clipboard=getToolkit().getSystemClipboard();text1=new TextArea(10,20); //为对象分配内存，使用new和构造方法menubar=new MenuBar();menu1=new Menu("文件");menu2=new Menu("编辑");menu3=new Menu("工具");item1=new MenuItem("打开");item1.setShortcut(new MenuShortcut(KeyEvent.VK_O));item2=new MenuItem("保存");item2.setShortcut(new MenuShortcut(KeyEvent.VK_S));item3=new MenuItem("退出");item3.setShortcut(new MenuShortcut(KeyEvent.VK_E));item4=new MenuItem("剪切");item4.setShortcut(new MenuShortcut(KeyEvent.VK_C));item5=new MenuItem("复制");item5.setShortcut(new MenuShortcut(KeyEvent.VK_P));item6=new MenuItem("粘贴");item6.setShortcut(new MenuShortcut(KeyEvent.VK_V));item7=new MenuItem("计算器");item7.setShortcut(new MenuShortcut(KeyEvent.VK_Q));item1.addActionListener(this);//将窗口作为它的监视器item2.addActionListener(this);item3.addActionListener(this);item4.addActionListener(this);item5.addActionListener(this);item6.addActionListener(this);item7.addActionListener(this);menu1.add(item1);//调用add()方法添加组件menu1.add(item2);menu1.add(item3);menu2.add(item4);menu2.add(item5);menu2.add(item6);menu3.add(item7);menubar.add(menu1);menubar.add(menu2);menubar.add(menu3);setMenuBar(menubar);//将菜单条放置到窗口add(text1);filedialog_save=new FileDialog(this,"保存对话框",FileDialog.SA VE); filedialog_load=new FileDialog(this,"打开对话框",FileDialog.LOAD);filedialog_load.addWindowListener(new WindowAdapter()//保存对话框增加适配器{public void windowClosing(WindowEvent e){ filedialog_load.setVisible(false);}});filedialog_save.addWindowListener(new WindowAdapter()//打开对话框增加适配器{public void windowClosing(WindowEvent e){ filedialog_save.setVisible(false);}});addWindowListener(new WindowAdapter() //增加适配器使窗口正常关闭{ public void windowActivated(WindowEvent e){}public void windowClosing(WindowEvent e){ System.exit(0);}});list=new Choice();text0=new JTextArea();text0.setForeground(Color.blue);GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();String fontName[]=ge.getAvailableFontFamilyNames();for(int i=0;i<fontName.length;i++){ list.add(fontName[i]); }add(list,BorderLayout.NORTH);add(text0,BorderLayout.CENTER);text0.setForeground(Color.red);list.addItemListener(this);setVisible(true);//窗口可见setResizable(true);//可调整大小validate();//保证组件正确显示}public void itemStateChanged(ItemEvent e){ String name=list.getSelectedItem();Font f=new Font(name,Font.BOLD,32);text0.setFont(f);text0.setText("");}public void actionPerformed(ActionEvent e)//实现接口方法{ if(e.getSource()==item1) //使用文件对话框打开文件{ filedialog_load.setVisible(true);text0.setText(null);String s;if(filedialog_load.getFile()!=null){try{ File file= new File(filedialog_load.getDirectory(),filedialog_load.getFile());file_reader=new FileReader(file);in=new BufferedReader(file_reader);while((s=in.readLine())!=null)text0.append(s+'\n');in.close();file_reader.close();}catch(IOException e2){System.out.println("打开失败");}}}else if(e.getSource()==item2) //使用文件对话框保存文件{ filedialog_save.setVisible(true);if(filedialog_save.getFile()!=null){try{File file=new File(filedialog_save.getDirectory(),filedialog_save.getFile());tofile=new FileWriter(file);out=new BufferedWriter(tofile);out.write(text.getText(),0,(text.getText()).length());out.close();tofile.close();}catch(IOException e2){}}}else if(e.getSource()==item3) //实现退出功能{ System.exit(0);}else if(e.getSource()==item4) //实现剪切功能{ String temp=text0.getSelectedText();StringSelection text=new StringSelection(temp);clipboard.setContents(text,null);int start=text0.getSelectionStart();int end =text0.getSelectionEnd();text0.replaceRange("",start,end) ; //从text1中删除被选取的文本}else if(e.getSource()==item5) //实现复制功能{ String temp=text0.getSelectedText(); //得到鼠标拖动选取的文本StringSelection text=new StringSelection(temp);clipboard.setContents(text,null);}else if(e.getSource()==item6) //实现粘贴功能{ Transferable contents=clipboard.getContents(this);DataFlavor flavor= DataFlavor.stringFlavor;if( contents.isDataFlavorSupported(flavor))try{ String str;str=(String)contents.getTransferData(flavor);int pos=text0.getCaretPosition();text0.insert(str,pos);}catch(Exception ee){}}else if(e.getSource()==item7)//实现计算器功能{CalculatorFrame co=new CalculatorFrame();co.setTitle("计算器");//设置窗口标题toFront();}}}二、运行过程及其结果的主要截图图1 打开文件及菜单项图2 保存对话框图3 计算器窗口和复数运算窗口三、课程设计总结这次的课程设计，使我对java有了进一步的了解和体会。