JAVA 简易小计算器代码.docx

-import java.awt.Toolkit; 2 -import java.awt.datatransfer.StringSelection; 3 -import java.awt.event.ActionEvent; 4 -import java.awt.event.ActionListener; 5 - 6 -import javax.swing.*; 7 - 8 -public class CalcFrame extends JFrame 9 - 10 - public CalcFrame() 11 - 12 - super(); 13 - 14 - addMenu(); 15 - stdPanel = new StdJPanel(); 16 - proPanel = new ProJPanel(); 17 - addstdPanel(); 18 - 19 - 20 - /* 21 - * add the menu 22 - */ 23 - private void addMenu() 24 - 25 - menuBar = new JMenuBar(); 26 - this.setJMenuBar(menuBar); 27 - 28 - /add the view menu 29 - JMenu viewMenu = new MyJMenu(View, V); 30 - menuBar.add(viewMenu); 31 - 32 - JMenuItem standardItem = new MyJMenuItem(Standard, ctrl S); 33 - standardItem.addActionListener(new ActionListener() 34 - 35 - public void actionPerformed(ActionEvent event) 36 - 37 - if(preSec.equals(Std) return; 38 - proPanel.setVisible(false); 39 - stdPanel.setVisible(true); 40 - addstdPanel(); 41 - preSec = Std; 42 - 43 - ); 44 - viewMenu.add(standardItem); 45 - 46 - JMenuItem programmerItem = new MyJMenuItem(Programmer, ctrl P); 47 - programmerItem.addActionListener(new ActionListener() 48 - 49 - public void actionPerformed(ActionEvent event) 50 - 51 - if(preSec.equals(Pro) return; 52 - stdPanel.setVisible(false); 53 - proPanel.setVisible(true); 54 - addproPanel(); 55 - preSec = Pro; 56 - 57 - ); 58 - viewMenu.add(programmerItem); 59 - 60 - viewMenu.addSeparator(); 61 - 62 - JMenuItem exitItem = new MyJMenuItem(Exit,ctrl X); 63 - exitItem.addActionListener(new ActionListener() 64 - 65 - public void actionPerformed(ActionEvent event) 66 - 67 - System.exit(0); 68 - 69 - ); 70 - viewMenu.add(exitItem); 71 - 72 - /add the edit menu 73 - JMenu editMenu = new MyJMenu(Edit, E); 74 - menuBar.add(editMenu); 75 - 76 - JMenuItem copyItem = new MyJMenuItem(Copy, ctrl C); 77 - copyItem.addActionListener(new ActionListener() 78 - 79 - public void actionPerformed(ActionEvent event) 80 - 81 - String str =; 82 - if(preSec.equals(Std) str = stdPanel.echo();else str = proPanel.echo(); 83 - Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new StringSelection(str), null); 84 - 85 - ); 86 - editMenu.add(copyItem); 87 - 88 - JMenuItem pasteItem = new MyJMenuItem(Paste, ctrl V); 89 - pasteItem.setEnabled(false); 90 - editMenu.add(pasteItem); 91 - 92 - /add the help menu 93 - JMenu helpMenu = new MyJMenu(Help, H); 94 - menuBar.add(helpMenu); 95 - 96 - JMenuItem aboutItem = new MyJMenuItem(About, ctrl A); 97 - aboutItem.addActionListener(new ActionListener() 98 - 99 - public void actionPerformed(ActionEvent event) 100 - 101 - JOptionPane.showMessageDialog(rootPane, This program is writen by LazyDomino); 102 - 103 - ); 104 - helpMenu.add(aboutItem); 105 - 106 - 107 - /* 108 - * add the stdPanel 109 - * wid= 294 110 - * hei= 322 111 - */ 112 - private void addstdPanel() 113 - 114 - stdPanel.init(); 115 - this.add(stdPanel); 116 - this.pack(); 117 - this.stdPanel.requestFocus(); 118 - 119 - 120 - /* 121 - * add the proPanel 122 - */ 123 - private void addproPanel() 124 - 125 - proPanel.init(); 126 - this.add(proPanel); 127 - this.pack(); 128 - Panel.requestFocus(); 129 - 130 - 131 - 132 - private StdJPanel stdPanel; 133 - private ProJPanel proPanel; 134 - private JMenuBar menuBar; 135 - private String preSec = Std; 136 - 137 - 138 - 139 - 140 -class MyJMenuItem extends JMenuItem 141 - 142 - public MyJMenuItem(String name, String shortcut) 143 - 144 - super(name, shortcut.charAt(5); 145 - this.setAccelerator(KeyStroke.getKeyStroke(shortcut); 146 - 147 - 148 -class MyJMenu extends JMenu 149 - 150 - public MyJMenu(String name, char shortcut) 151 - 152 - super(name); 153 - this.setMnemonic(shortcut); 154 - import java.awt.Toolkit; import java.awt.datatransfer.StringSelection; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; public class CalcFrame extends JFrame public CalcFrame() super(); addMenu(); stdPanel = new StdJPanel(); proPanel = new ProJPanel(); addstdPanel(); /* * add the menu */ private void addMenu() menuBar = new JMenuBar(); this.setJMenuBar(menuBar); /add the view menu JMenu viewMenu = new MyJMenu(View, V); menuBar.add(viewMenu); JMenuItem standardItem = new MyJMenuItem(Standard, ctrl S); standardItem.addActionListener(new ActionListener() public void actionPerformed(ActionEvent event) if(preSec.equals(Std) return; proPanel.setVisible(false); stdPanel.setVisible(true); addstdPanel(); preSec = Std; ); viewMenu.add(standardItem); JMenuItem programmerItem = new MyJMenuItem(Programmer, ctrl P); programmerItem.addActionListener(new ActionListener() public void actionPerformed(ActionEvent event) if(preSec.equals(Pro) return; stdPanel.setVisible(false); proPanel.setVisible(true); addproPanel(); preSec = Pro; ); viewMenu.add(programmerItem); viewMenu.addSeparator(); JMenuItem exitItem = new MyJMenuItem(Exit,ctrl X); exitItem.addActionListener(new ActionListener() public void actionPerformed(ActionEvent event) System.exit(0); ); viewMenu.add(exitItem); /add the edit menu JMenu editMenu = new MyJMenu(Edit, E); menuBar.add(editMenu); JMenuItem copyItem = new MyJMenuItem(Copy, ctrl C); copyItem.addActionListener(new ActionListener() public void actionPerformed(ActionEvent event) String str =; if(preSec.equals(Std) str = stdPanel.echo();else str = proPanel.echo(); Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new StringSelection(str), null); ); editMenu.add(copyItem); JMenuItem pasteItem = new MyJMenuItem(Paste, ctrl V); pasteItem.setEnabled(false); editMenu.add(pasteItem); /add the help menu JMenu helpMenu = new MyJMenu(Help, H); menuBar.add(helpMenu); JMenuItem aboutItem = new MyJMenuItem(About, ctrl A); aboutItem.addActionListener(new ActionListener() public void actionPerformed(ActionEvent event) JOptionPane.showMessageDialog(rootPane, Writen by Pisces (); ); helpMenu.add(aboutItem); /* * add the stdPanel *