Java制作记事本提高（复杂的记事本）及一些复杂功能实现代码

package texteditor4; import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; import java.io.*; import javax.swing.event.*; import com.borland.dbswing.*; /** * <p>Title: </p> * <p>Description: </p> * <p>Copyright: Copyright (c) 2004</p> * <p>Company: </p> * @author not attributable * @version 1.0 */ public class TextEditor4 extends JFrame { JPanel contentPane; BorderLayout borderLayout1 = new BorderLayout(); JMenuBar jMenuBar1 = new JMenuBar(); JToolBar jToolBar1 = new JToolBar(); JMenu jMenu1 = new JMenu(); JMenuItem jMenuItem1 = new JMenuItem(); JMenuItem jMenuItem2 = new JMenuItem(); JMenuItem jMenuItem3 = new JMenuItem(); JMenuItem jMenuItem4 = new JMenuItem(); JMenuItem jMenuItem5 = new JMenuItem(); JLabel jLabel1 = new JLabel(); JScrollPane jScrollPane1 = new JScrollPane(); JTextArea jTextArea1 = new JTextArea(); String filename; //文件名 boolean isSaved = false; Document document; JFileChooser jFileChooser1 = new JFileChooser(); JMenu jMenu2 = new JMenu(); JMenuItem jMenuItem6 = new JMenuItem(); JMenuItem jMenuItem7 = new JMenuItem(); FontChooser fontChooser1 = new FontChooser(); JMenuItem jMenuItem8 = new JMenuItem(); JButton jButton1 = new JButton(); ImageIcon imageIcon1; ImageIcon imageIcon2; ImageIcon imageIcon3; ImageIcon imageIcon4; JButton jButton2 = new JButton(); JButton jButton3 = new JButton(); JButton jButton4 = new JButton(); JMenu jMenu3 = new JMenu(); JMenuItem jMenuItem9 = new JMenuItem(); //Construct the frame public TextEditor4() { enableEvents(AWTEvent.WINDOW_EVENT_MASK); try { jbInit(); } catch (Exception e) { e.printStackTrace(); } } //Component initialization private void jbInit() throws Exception { imageIcon1 = new ImageIcon(TextEditor4.class.getResource("new.gif")); imageIcon2 = new ImageIcon(TextEditor4.class.getResource("open.gif")); imageIcon3 = new ImageIcon(TextEditor4.class.getResource("save.gif")); imageIcon4 = new ImageIcon(TextEditor4.class.getResource("saveas.gif")); contentPane = (JPanel)this.getContentPane(); contentPane.setLayout(borderLayout1); document = jTextArea1.getDocument(); this.setSize(new Dimension(400, 300)); this.setTitle("记事本"); jMenu1.setText("文件"); jMenuItem1.setText("新建"); jMenuItem1.addActionListener(new TextEditor4_jMenuItem1_actionAdapter(this)); jMenuItem2.setText("打开"); jMenuItem2.addActionListener(new TextEditor4_jMenuItem2_actionAdapter(this)); jMenuItem3.setText("保存"); jMenuItem3.addActionListener(new TextEditor4_jMenuItem3_actionAdapter(this)); jMenuItem4.setText("另存为"); jMenuItem4.addActionListener(new TextEditor4_jMenuItem4_actionAdapter(this)); jMenuItem5.setText("退出"); jMenuItem5.addActionListener(new TextEditor4_jMenuItem5_actionAdapter(this)); jTextArea1.setText(""); jLabel1.setToolTipText(""); jLabel1.setText(" "); document.addDocumentListener(new TextEditor4_document_documentAdapter(this)); jMenu2.setText("设置"); jMenuItem6.setText("设置前景色"); jMenuItem6.addActionListener(new TextEditor4_jMenuItem6_actionAdapter(this)); jMenuItem7.setText("设置背景色"); jMenuItem7.addActionListener(new TextEditor4_jMenuItem7_actionAdapter(this)); jMenuItem8.setText("设置字体"); jMenuItem8.addActionListener(new TextEditor4_jMenuItem8_actionAdapter(this)); jButton1.setToolTipText("new file"); jButton1.setIcon(null); jButton1.setSelectedIcon(null); jButton1.setText(""); jButton1.addActionListener(new TextEditor4_jButton1_actionAdapter(this)); jButton2.setToolTipText("open file"); jButton2.setVerifyInputWhenFocusTarget(true); jButton2.setText(""); jButton2.addActionListener(new TextEditor4_jButton2_actionAdapter(this)); jButton3.setToolTipText("save"); jButton3.setText(""); jButton3.addActionListener(new TextEditor4_jButton3_actionAdapter(this)); jButton4.setToolTipText("save as"); jButton4.setText(""); jButton4.addActionListener(new TextEditor4_jButton4_actionAdapter(this)); jButton1.setIcon(imageIcon1); jButton2.setIcon(imageIcon2); jButton3.setIcon(imageIcon3); jButton4.setIcon(imageIcon4); jMenu3.setText("帮助"); jMenuItem9.setText("关于"); jMenuItem9.addActionListener(new TextEditor4_jMenuItem9_actionAdapter(this)); jMenuBar1.add(jMenu1); jMenuBar1.add(jMenu2); jMenuBar1.add(jMenu3); jMenu1.add(jMenuItem1); jMenu1.add(jMenuItem2); jMenu1.add(jMenuItem3); jMenu1.add(jMenuItem4); jMenu1.addSeparator(); jMenu1.add(jMenuItem5); contentPane.add(jLabel1, BorderLayout.SOUTH); contentPane.add(jScrollPane1, BorderLayout.CENTER); contentPane.add(jToolBar1, BorderLayout.NORTH); jToolBar1.add(jButton1, null); jToolBar1.add(jButton2, null); jToolBar1.add(jButton3, null); jToolBar1.add(jButton4, null); jScrollPane1.getViewport().add(jTextArea1, null); jMenu2.add(jMenuItem6); jMenu2.add(jMenuItem7); jMenu2.addSeparator(); jMenu2.add(jMenuItem8); jMenu3.add(jMenuItem9); this.setJMenuBar(jMenuBar1); fontChooser1.setFrame(this); } //Overridden so we can exit when window is closed protected void processWindowEvent(WindowEvent e) { super.processWindowEvent(e); if (e.getID() == WindowEvent.WINDOW_CLOSING) { System.exit(0); } } public void newFile() { //创建新的文本文件 if (toExit()) { jTextArea1.setText(""); filename = null; isSaved = false; updateFileName(); jLabel1.setText("新建文件：" + filename); } } boolean save() { //保存文件 if (filename == null) { //如果文件名为空，则调用saveAs()方法 return saveAs(); } try { File file = new File(filename); //新建文件对象 FileWriter out = new FileWriter(file); String text = jTextArea1.getText(); out.write(text); //写文件 out.close(); this.isSaved = false; //将文件状态设为已保存 jLabel1.setText("保存文件：" + filename); updateFileName(); //更新文件标题 return true; } catch (Exception e) { jLabel1.setText("错误" + e); } return false; } boolean saveAs() { //文件另存为 if (JFileChooser.APPROVE_OPTION == jFileChooser1.showSaveDialog(this)) { filename = jFileChooser1.getSelectedFile().getPath(); //获得文件路径 return save(); //调用save()方法保存文件 } else { return false; } } void updateFileName() { //更新标题文件名 String str; if (filename == null) { //如果文件名为空，则标题名为Untitled str = "Untitled"; } else { str = filename; } if (isSaved) { str = "记事本-" + str; } this.setTitle(str); //设置标题名 this.repaint(); } boolean toExit() { //是否能关闭当前文件 if (!isSaved) { //如果文件没有改变则返回true return true; } int i = JOptionPane.showConfirmDialog(this, "是否保存文档？", "记事本", JOptionPane.YES_NO_CANCEL_OPTION); switch (i) { case JOptionPane.YES_OPTION: //如选择yes，则保存文件 return save(); case JOptionPane.NO_OPTION: //选择no，则不保存文件，退出 return true; case JOptionPane.CANCEL_OPTION: //选择cancel，则退回原理状态 return false; default: return false; } } void openFile() { //打开文件 if (!toExit()) { //检查是否能关闭现在的文件 return; } if (JFileChooser.APPROVE_OPTION == jFileChooser1.showOpenDialog(this)) { try { String filename1 = jFileChooser1.getSelectedFile().getPath(); //获取文件路径 File file = new File(filen