import javax.swing.*;import javax.swing.undo.*;import javax.swing.text.*;import javax.swing.event.*;import java.awt.*;import java.awt.event.*;import java.text.*;import java.util.*;import java.awt.datatransfer.*;import java.awt.print.*;import java.io.*;public class Jishiben extends JFrame implements ActionListener { JPopupMenu pm ;JTextArea ta;boolean isNewFile=true; //是否新文件(未保存过的)File currentFile; //当前文件名String oldValue; //存放编辑区原来的内容,用于比较文本是否有改动//protected UndoManager undo = new UndoManager();//protected UndoableEditListener undoHandler = new UndoHandler();JToolBar tbar = new JToolBar();JCheckBoxMenuItem mt19;public Jishiben(){super("记事本");//Container ct=getContentPane();//以下三句是设置编辑区域及滚动条ta = new JTextArea();JScrollPane sp = new JScrollPane(ta);add(sp);JMenuBar mb = new JMenuBar();//设置文件菜单JMenu mu1 = new JMenu("文件(F)",true);mu1.setMnemonic('F');//设置快捷键按下ALT+F激活打开菜单JMenuItem mt1 = new JMenuItem("新建(N)",'N');mt1.setMnemonic('N');//mt1.addActionListener(new new1());JMenuItem mt2 = new JMenuItem("打开(O)...",'O');mt2.setMnemonic('O');mt2.addActionListener(this);JMenuItem mt3 = new JMenuItem("保存(S)",'S');//mt3.addActionListener(new save());mu1.add(mt3);JMenuItem mt4 = new JMenuItem("另存为(A)...");JMenuItem mt5 = new JMenuItem("页面设置(A)...");JMenuItem mt6 = new JMenuItem("打印(P)...");JMenuItem mt7 = new JMenuItem("退出(X)",'X');//组合键的设置mt1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.C TRL_MASK)); //新建mt2.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.C TRL_MASK)); //打开mt3.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.C TRL_MASK)); //保存mt6.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,InputEvent.C TRL_MASK)); //打印this.setJMenuBar(mb);mb.add(mu1);mu1.add(mt1);mu1.add(mt2);mu1.add(mt3);mu1.add(mt4);mu1.addSeparator();mu1.add(mt5);mu1.add(mt6);mu1.addSeparator();mu1.add(mt7);//设置编辑菜单JMenu mu2 = new JMenu("编辑(E)",true);mu2.setMnemonic('E');JMenuItem mt8 = new JMenuItem("辙稍(U)",'U');JMenuItem mt9 = new JMenuItem("剪切(T)",'T');JMenuItem mt10 = new JMenuItem("复制(C)",'C');JMenuItem mt11 = new JMenuItem("粘贴(P)",'P');JMenuItem mt12 = new JMenuItem("删除(L)",'L');JMenuItem mt13 = new JMenuItem("查找(F)",'F');JMenuItem mt14 = new JMenuItem("查找下一个(N)",'N');JMenuItem mt15 = new JMenuItem("替换(R)...",'R');JMenuItem mt16 = new JMenuItem("转到(G)...",'G');JMenuItem mt17 = new JMenuItem("全选(A)",'A');JMenuItem mt18 = new JMenuItem("时间/日期(D)",'D');//组合键的设置mt8.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z,InputEvent.C TRL_MASK)); //辙稍mt9.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.C TRL_MASK)); //剪切mt10.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent. CTRL_MASK));//复制mt11.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent. CTRL_MASK));//粘贴mt12.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,0));//删除mt13.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,InputEvent. CTRL_MASK));//查找mt14.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0));//查找下一个mt15.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H,InputEvent. CTRL_MASK));//替换mt16.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G,InputEvent. CTRL_MASK));//转到mt17.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent. CTRL_MASK));//全选mt18.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,0));//时间/日期mb.add(mu2);mu2.add(mt8);mu2.addSeparator();//分隔线mu2.add(mt9);mu2.add(mt10);mu2.add(mt11);mu2.add(mt12);mu2.addSeparator();mu2.add(mt13);mu2.add(mt14);mu2.add(mt15);mu2.add(mt16);mu2.addSeparator();mu2.add(mt17);mu2.add(mt18);//设置格式菜单JMenu mu3 = new JMenu("格式(O)",true);mu3.setMnemonic('O');mt19 = new JCheckBoxMenuItem("自动换行(W)");mt19.setMnemonic('W');JMenuItem mt20 = new JMenuItem("字体(F)...",'F');JMenuItem mtys = new JMenuItem("颜色");mb.add(mu3);mu3.add(mt19);mu3.add(mt20);mu3.add(mtys);//设置查看菜单JMenu mu4 = new JMenu("查看(V)",true);mu4.setMnemonic('V');JCheckBoxMenuItem mt21 = new JCheckBoxMenuItem("状态栏(S)");mt21.setMnemonic('S');mb.add(mu4);mu4.add(mt21);//设置帮助菜单JMenu mu5 = new JMenu("帮助(H)",true);mu5.setMnemonic('H');JMenuItem mt22 = new JMenuItem("帮助文档(H)",'H'); JMenuItem mt23 = new JMenuItem("关于记事本(A)",'A'); mt22.addActionListener(this);mt23.addActionListener(this);mb.add(mu5);mu5.add(mt22);mu5.addSeparator();mu5.add(mt23);setVisible(true);//显示记事本的位置setBounds(400,200,500,400);//设置右键菜单pm = new JPopupMenu();JMenuItem undo = new JMenuItem("辙销(U)",'U'); JMenuItem cut = new JMenuItem("剪切(T)");cut.setMnemonic('T');JMenuItem copy = new JMenuItem("复制(C)",'C'); JMenuItem paste = new JMenuItem("粘贴(P)",'P'); JMenuItem Delete = new JMenuItem("删除(D)",'D'); JMenuItem All = new JMenuItem("全选(A)",'A');//undo.setEnabled(false);//撤消选项初始设为不可用ta.add(pm);ta.addMouseListener(new MouseAdapter(){public void mouseReleased(MouseEvent e) {if(e.isPopupTrigger()){pm.show(ta,e.getX(),e.getY());}}public void mousePressed(MouseEvent e) {mouseReleased(e);}});pm.add(undo);pm.addSeparator();pm.add(cut);pm.add(copy);pm.add(paste);pm.add(Delete);pm.addSeparator();pm.add(All);undo.addActionListener(this);cut.addActionListener(this);copy.addActionListener(this);paste.addActionListener(this);Delete.addActionListener(this);All.addActionListener(this);//系统剪贴板Toolkit tk = Toolkit.getDefaultToolkit();Clipboard clipBoard = tk.getSystemClipboard();}public static void main(String[] args){new Jishiben();}public void actionPerformed(ActionEvent e){if(e.getActionCommand().equals("辙销")){}if(e.getActionCommand()=="剪切(T)"){ta.cut();}if(e.getActionCommand().equals("复制(C)")){ta.copy();}if(e.getActionCommand().equals("粘贴(P)")){ta.paste();}if(e.getSource().equals("自动换行(W)")){if(mt19.getState()){ta.setLineWrap(true);ta.setWrapStyleWord(true);}else{ta.setLineWrap(false);ta.setWrapStyleWord(false);}}}}。