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1、编写一个记事本程序-要求：-用图形用户界面实现。-能实现编辑、保存、另存为、查找替换等功能。 作者： 日期：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.getContentP
2、ane(); 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);
3、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(
4、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.se
5、tLayout(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); jmi
6、1.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.getKe
7、yStroke(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); jm
8、2.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(JFra
9、me.DISPOSE_ON_CLOSE); this.setSize(500,500); this.setVisible(true); public void actionPerformed(ActionEvent e) if(e.getSource()=jmi1) 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=JFileCh
10、ooser.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
11、(); 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); Buf
12、feredWriter bw = new BufferedWriter(fw); bw.write(jta.getText(); bw.close(); fw.close(); catch(IOException e2) e2.printStackTrace(); if(e.getSource()=jmi4) 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 = nu
13、ll; 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.clo
14、se(); 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.setSelec
