import java.io.*;import java.util.Calendar;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class NoteBook extends JFrame implements ActionListener,ItemListener,WindowListener,MouseListener{Container c = this.getContentPane();JMenuBar jmb = new JMenuBar();JColorChooser jcc = new JColorChooser();JMenu jm1 = new JMenu("文件(F)");JMenu jm2 = new JMenu("编辑(E)");JMenu jm3 = new JMenu("格式(O)");JMenu jm4 = new JMenu("查看(V)");JMenu jm5 = new JMenu("帮助(H)");JMenuItem jmi1 = new JMenuItem("新建(N)");JMenuItem jmi2 = new JMenuItem("打开(O)");JMenuItem jmi3 = new JMenuItem("保存(S)");JMenuItem jmi4 = new JMenuItem("退出(X)");JMenuItem jmi5 = new JMenuItem("撤消(U)");JMenuItem jmi6 = new JMenuItem("复制(C)");JMenuItem jmi7 = new JMenuItem("粘贴(P)");JMenuItem jmi8 = new JMenuItem("剪切(T)");JMenuItem jmi12 = new JMenuItem("日期和时间");JMenuItem jmi9 =m new JMenuItem("字体(E)");JCheckBoxMenuItem jcbmi = new JCheckBoxMenuItem("自动换行(W)");JMenuItem jmi10 = new JMenuItem("删除(S)");JMenuItem jmi11 = new JMenuItem("背景颜色(H)");JTextArea jta = new JTextArea(15,15);JScrollPane jsp = new JScrollPane(jta);//PupolMenu pm = new Pupolmenu();NoteBook(){this.addWindowListener(this);c.setLayout(new BorderLayout());c.add(jmb,BorderLayout.NORTH);this.setTitle("新建文本文档");jmb.add(jm1);jm1.setMnemonic('f');jm1.addActionListener(this);jmb.add(jm2);jm2.setMnemonic('e');jmb.add(jm3);jm3.setMnemonic('o');jmb.add(jm4);jm4.setMnemonic('v');jmb.add(jm5);jm5.setMnemonic('h');jm1.add(jmi1);jmi1.addActionListener(this);jmi1.setAccelerator(KeyStroke.getKeyStroke('N',Event.CTRL_MASK,false)); jm1.addSeparator();jm1.add(jmi2);jmi2.setAccelerator(KeyStroke.getKeyStroke('O',Event.CTRL_MASK,false)); jmi2.addActionListener(this);jm1.addSeparator();jm1.add(jmi3);jmi3.setAccelerator(KeyStroke.getKeyStroke('S',Event.CTRL_MASK,false)); jmi3.addActionListener(this);jm1.addSeparator();jm1.add(jmi4);jmi1.setMnemonic('n');jmi2.setMnemonic('o');jmi3.setMnemonic('s');jmi4.setMnemonic('x');jmi4.addActionListener(this);jm2.add(jmi5);jm2.addSeparator();jm2.add(jmi6);jm2.addSeparator();jm2.add(jmi7);jm2.addSeparator();jm2.add(jmi8);jm2.add(jmi12);jmi12.addActionListener(this);jm3.add(jcbmi);jcbmi.addItemListener(this);jm3.addSeparator();jm3.add(jmi9);jm4.add(jmi10);jmi10.addActionListener(this);jm5.add(jmi11);jmi11.addActionListener(this);c.add(jsp);this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);this.setSize(500,500);this.setVisible(true);}public void actionPerformed(ActionEvent e){jta.setText("");this.setTitle("无标题- 记事本");}if(e.getSource()==jmi2){File f1;JFileChooser jfc1 = new JFileChooser();int num1 = jfc1.showOpenDialog(this);if(num1==JFileChooser.APPROVE_OPTION){ try{f1 = jfc1.getSelectedFile();this.setTitle(f1.getName());FileReader fr = new FileReader(f1); BufferedReader br = new BufferedReader(fr); String str;while((str = br.readLine())!=null){jta.setText(str);}fr.close();br.close();}catch(FileNotFoundException e1){e1.printStackTrace();}catch(IOException e2){e2.printStackTrace();}}}if(e.getSource()==jmi3){File f2 = null;JFileChooser jfc2 = new JFileChooser();int num2 = jfc2.showSaveDialog(this);if(num2==JFileChooser.APPROVE_OPTION){ f2=jfc2.getSelectedFile();this.setTitle(f2.getName());try{FileWriter fw = new FileWriter(f2); BufferedWriter bw = new BufferedWriter(fw); bw.write(jta.getText());bw.close();fw.close();}catch(IOException e2){e2.printStackTrace();}}int a = JOptionPane.showConfirmDialog(this,"文件已被改变，是否要保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION);if(a==1){this.dispose();}else if(a==0){File f2 = null;JFileChooser jfc2 = new JFileChooser();int num2 = jfc2.showSaveDialog(this);if(num2==JFileChooser.APPROVE_OPTION){f2=jfc2.getSelectedFile();this.setTitle(f2.getName());try{FileWriter fw = new FileWriter(f2);BufferedWriter bw = new BufferedWriter(fw);bw.write(jta.getText());bw.close();fw.close();}catch(IOException e2){e2.printStackTrace();}this.dispose();}}}if(e.getSource()==jmi12){Calendar c1 =Calendar.getInstance();int y = c1.get(Calendar.YEAR);int m = c1.get(Calendar.MONTH);int d = c1.get(Calendar.DATE);int h = c1.get(Calendar.HOUR);int m1 = c1.get(Calendar.MINUTE);int m2 = m+1;jta.setText(y+"年"+m2+"月"+d+"日"+h+":"+m1);}if(e.getSource()==jmi11){Color ccc = JColorChooser.showDialog(this,"color",Color.BLACK);jta.setSelectedTextColor(ccc);jta.setBackground(ccc);}if(e.getSource()==jmi10){jta.replaceRange("",jta.getSelectionStart(),jta.getSelectionEnd());}mHelp = new JMenu("帮助(H)");mHelp.setMnemonic(KeyEvent.VK_H);mHelp.add(new JMenuItem("帮助主题"));mHelp.addSeparator();mHelp.add(new JMenuItem("关于计算器"));mPaste.setEnabled(true);} else if(s.equals("粘贴(P)")){ tResult.setText(copyBoard.toString());} else if(s.equals("CE")){//如果是CE则清除文本框tResult.setText("0.");} else if(s.equals("Backspace")){//如果是backspace则删除一个字符。