一个用java编写的记事本小程序.doc

package com.xs.pratice;import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyEvent;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import javax.swing.JCheckBoxMenuItem;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JOptionPane;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextPane;import javax.swing.KeyStroke;import javax.swing.WindowConstants;public class NotePadTest extends JFrame private static final long serialVersionUID = 7733222986650734523L;JMenuBar jmb = new JMenuBar();/ 创建子菜单JMenu jm1 = new JMenu(文件);JMenu jm2 = new JMenu(编辑);JMenu jm3 = new JMenu(格式);JMenu jm5 = new JMenu(帮助);/ 创建菜单项(文件)JMenuItem jme1 = new JMenuItem(新建);JMenuItem jme2 = new JMenuItem(打开);JMenuItem jme3 = new JMenuItem(保存);JMenuItem jme4 = new JMenuItem(另存为.);JMenuItem jme5 = new JMenuItem(退出);/ 创建菜单项(编辑)JMenuItem jme6 = new JMenuItem(全选);JMenuItem jme7 = new JMenuItem(剪切);JMenuItem jme8 = new JMenuItem(复制);JMenuItem jme9 = new JMenuItem(粘贴);JMenuItem jme10 = new JMenuItem(删除);/ 创建菜单项(格式)JCheckBoxMenuItem jme11 = new JCheckBoxMenuItem(自动换行, false);/ 创建菜单项(帮助)JMenuItem jme14 = new JMenuItem(查看帮助);JMenuItem jme15 = new JMenuItem(关于记事本);/ 实例化文本域JTextArea jtext = new JTextArea();JTextPane pane = new JTextPane();/ 文本窗格JScrollPane jscroll = new JScrollPane(jtext);JTextPane jtshow = new JTextPane();public NotePadTest() setTitle(记事本);setSize(500, 460);setLocationRelativeTo(null);pane.setLayout(new BorderLayout();/ 设置快捷键jme1.setMnemonic(N);jme1.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, KeyEvent.CTRL_MASK);jme2.setMnemonic(O);jme2.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, KeyEvent.CTRL_MASK);jme3.setMnemonic(S);jme3.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, KeyEvent.CTRL_MASK);jme6.setMnemonic(A);jme6.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, KeyEvent.CTRL_MASK);jme7.setMnemonic(X);jme7.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, KeyEvent.CTRL_MASK);jme8.setMnemonic(C);jme8.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, KeyEvent.CTRL_MASK);jme9.setMnemonic(V);jme9.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, KeyEvent.CTRL_MASK);jme10.setMnemonic(L);jme10.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L, KeyEvent.CTRL_MASK);/ 添加菜单项到子菜单（文件）jm1.add(jme1);jm1.addSeparator();jm1.add(jme2);jm1.addSeparator();jm1.add(jme3);jm1.addSeparator();jm1.add(jme4);jm1.addSeparator();jm1.add(jme5);jmb.add(jm1);/ 添加菜单项到子菜单（编辑）jm2.add(jme6);jm2.addSeparator();jm2.add(jme7);jm2.addSeparator();jm2.add(jme8);jm2.addSeparator();jm2.add(jme9);jm2.addSeparator();jm2.add(jme10);jmb.add(jm2);/ 添加菜单项到子菜单（格式）/ 设置快捷键jme11.setMnemonic(w);jme11.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, KeyEvent.CTRL_MASK);jm3.add(jme11);jmb.add(jm3);/ 添加菜单项到子菜单（帮助）jm5.add(jme14);jm5.addSeparator();jm5.add(jme15);jmb.add(jm5);/ 将菜单栏添加到窗体顶部setJMenuBar(jmb);/ container.add(jmb,BorderLayout.NORTH);/ 添加文本域pane.add(jscroll, BorderLayout.CENTER);add(pane);/ *添加事件监听器(全选部分)*jme6.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) jtext.selectAll();/ 全选);/ *添加事件监听器(剪切部分)*jme7.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) jtext.cut();/ 剪切);/ *添加事件监听器(复制部分)*jme8.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) jtext.copy();/ 复制);/ *添加事件监听器(粘贴部分)*jme9.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) jtext.paste();/ 粘贴);/ *添加事件监听器(删除部分)*jme10.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) jtext.replaceSelection(null);/ 删除);/ *添加事件监听器(新建部分)*jme1.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) if (jtext.getText().equals() jtext.setText(); else int result = JOptionPane.showConfirmDialog(NotePadTest.this, 是否将更改保存到无标题？, 记事本,JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);if (result = 0) save(););/ *添加事件监听器(打开部分)*jme2.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) JFileChooser choose = new JFileChooser();choose.setDialogTitle(打开);File file;int result = choose.showOpenDialog(NotePadTest.this);if (result = JFileChooser.APPROVE_OPTION) try / 获取当前选择的文件/ 创建文件输出流file = choose.getSelectedFile();BufferedReader br = new BufferedReader(new FileReader(file);String str = null;while (str = br.readLine() != null) jtext.append(str + rn);/ 设置记事本标题setTitle(file.getName() + 记事本);br.close(); catch (Exception ee) ee.printStackTrace(););/ *添加事件监听器(保存部分)*jme3.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) if (jtext.getText() != null & !jtext.getText().equals() save(););/ *添加事件监听器(另存为部分)*jme4.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) if (jtext.getText() != null & !jtext.getText().equals() save(););/ *添加事件监听器(退出部分)*jme5.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) if (jtext.getText().equals() NotePadTest.this.dispose(); else int result = JOptionPane.showConfirmDialog(NotePadTest.this, 是否将更改保存到无标题？, 记事本,JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);if (result = 0) if (jtext.getText() != null & !jtext.getText().equals() save(); else if (result = 1) NotePadTest.this.dispose(););/ *添加事件监听器(自动换行部分)*jme11.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) if (jme11.isSelected() jtext.setLineWrap(true); else jtext.setLineWrap(false););/ *添加事件监听器(查看帮助部分)*jme14.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) JOptionPane.showMessageDialog(NotePadTest.this, 输入文字即可！););/ *添加事件监听器(关于记事本部分)*jme15.addActionListener(new ActionListener() Overridepublic void actionPerformed(ActionEvent e) JOptionPane.showMessageDialog(NotePadTest.this, 版本：Windows旗舰版););/ 设置窗体关闭if (jtext.getText().equals() setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); else if (jtext.