利用java的IO流写的一个记事本

package fileproject; import java.awt.BorderLayout; import java.awt.Dimension; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JMenuBar; import javax.swing.JMenu; import javax.swing.JMenuItem; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JScrollPane; import java.awt.Rectangle; import javax.swing.JTextPane; import javax.swing.JTextArea; import javax.swing.JRadioButton; import javax.swing.JFileChooser; import java.io.File; import java.io.FileReader; import java.io.IOException; import javax.swing.JOptionPane; import java.io.BufferedReader; import java.io.FileReader; import java.io.BufferedWriter; import java.io.FileWriter; import java.util.Date; import java.text.DateFormat; import java.util.Locale; import com.borland.dbswing.FontChooser; /** * <p>Title: </p> * * <p>Description: </p> * * <p>Copyright: Copyright (c) 2008</p> * * <p>Company: </p> * * @author not attributable * @version 1.0 */ public class FileFrame extends JFrame { JPanel contentPane; JMenuBar MenuBar = new JMenuBar(); JMenu FileMenu = new JMenu(); JMenuItem MenuItemFirst = new JMenuItem(); JMenuItem MenuItemSecond = new JMenuItem(); JMenuItem MenuItemseventh = new JMenuItem(); JScrollPane jsp = new JScrollPane(); JTextArea txashow = new JTextArea(); JFileChooser fcselect = new JFileChooser(); JMenuItem MenuItemthird = new JMenuItem(); JMenuItem MenuItemforth = new JMenuItem(); JMenuItem MenuItemFifth = new JMenuItem(); JMenuItem MenuItemsixth = new JMenuItem(); JMenu editMenu = new JMenu(); JMenuItem MenuItemeighth = new JMenuItem(); JMenuItem MenuItemninth = new JMenuItem(); JMenuItem MenuItemtenth = new JMenuItem(); JMenuItem MenuItemeleventh = new JMenuItem(); JMenuItem MenuItemtweleventh = new JMenuItem(); JMenuItem MenuItemthirteenth = new JMenuItem(); JMenuItem MenuItemforteenth = new JMenuItem(); JMenuItem MenuItemfifteenth = new JMenuItem(); JMenuItem MenuItemsixteenth = new JMenuItem(); JMenuItem MenuItemseventeenth = new JMenuItem(); JMenu fontMenu = new JMenu(); JMenuItem MenuItemeighteenth = new JMenuItem(); JMenuItem MenuItemninteenth = new JMenuItem(); JMenu searchMenu = new JMenu(); JMenuItem MenuItemtwentieth = new JMenuItem(); JMenu helpMenu = new JMenu(); JMenuItem MenuItemtwentyfirst = new JMenuItem(); JMenuItem MenuItemtwentysecond = new JMenuItem(); FontChooser fontchoose = new FontChooser(); public FileFrame() { try { setDefaultCloseOperation(EXIT_ON_CLOSE); jbInit(); } catch (Exception exception) { exception.printStackTrace(); } } /** * Component initialization. * * @throws java.lang.Exception */ private void jbInit() throws Exception { contentPane = (JPanel) getContentPane(); contentPane.setLayout(null); this.setJMenuBar(MenuBar); setSize(new Dimension(406, 389)); setTitle("记事本程序"); FileMenu.setText("文件"); MenuItemFirst.setText("新建"); MenuItemFirst.addActionListener(new FileFrame_MenuItemFirst_actionAdapter(this)); MenuItemSecond.setText("打开"); MenuItemSecond.addActionListener(new FileFrame_MenuItemSecond_actionAdapter(this)); MenuItemseventh.setText("退出"); MenuItemseventh.addActionListener(new FileFrame_MenuItemThird_actionAdapter(this)); jsp.setBounds(new Rectangle( -1, 2, 404, 337)); MenuItemthird.setText("保存"); MenuItemthird.addActionListener(new FileFrame_jMenuItem1_actionAdapter(this)); MenuItemforth.setText("另存为"); MenuItemforth.addActionListener(new FileFrame_jMenuItem2_actionAdapter(this)); MenuItemFifth.setText("页面设置"); MenuItemsixth.setText("打印"); editMenu.setText("编辑"); MenuItemeighth.setText("撤销"); MenuItemninth.setText("剪切"); MenuItemtenth.setText("复制"); MenuItemeleventh.setText("粘贴"); MenuItemtweleventh.setText("删除"); MenuItemthirteenth.setText("查找"); MenuItemforteenth.setText("查找下一个"); MenuItemfifteenth.setText("替换"); MenuItemsixteenth.setText("转到"); MenuItemseventeenth.setActionCommand("时间/日期"); MenuItemseventeenth.setText("时间日期"); MenuItemseventeenth.addActionListener(new FileFrame_MenuItemseventeenth_actionAdapter(this)); fontMenu.setText("格式"); MenuItemeighteenth.setText("自动换行"); MenuItemninteenth.setText("字体"); MenuItemninteenth.addActionListener(new FileFrame_MenuItemninteenth_actionAdapter(this)); searchMenu.setText("查看"); MenuItemtwentieth.setText("状态栏"); helpMenu.setText("帮助"); MenuItemtwentyfirst.setText("帮助主题 "); MenuItemtwentysecond.setText("关于记事本"); fontchoose.setFrame(this); MenuBar.add(FileMenu); MenuBar.add(editMenu); MenuBar.add(fontMenu); MenuBar.add(searchMenu); MenuBar.add(helpMenu); FileMenu.add(MenuItemFirst); FileMenu.add(MenuItemSecond); FileMenu.add(MenuItemthird); FileMenu.add(MenuItemforth); FileMenu.addSeparator(); FileMenu.add(MenuItemFifth); FileMenu.add(MenuItemsixth); FileMenu.addSeparator(); FileMenu.add(MenuItemseventh); contentPane.add(jsp); jsp.getViewport().add(txashow); editMenu.add(MenuItemeighth); editMenu.addSeparator(); editMenu.add(MenuItemninth); editMenu.add(MenuItemtenth); editMenu.add(MenuItemeleventh); editMenu.add(MenuItemtweleventh); editMenu.addSeparator(); editMenu.add(MenuItemthirteenth); editMenu.add(MenuItemforteenth); editMenu.addSeparator(); editMenu.add(MenuItemfifteenth); editMenu.add(MenuItemsixteenth); editMenu.addSeparator(); editMenu.add(MenuItemseventeenth); fontMenu.add(MenuItemeighteenth); fontMenu.add(MenuItemninteenth); searchMenu.add(MenuItemtwentieth); helpMenu.add(MenuItemtwentyfirst); helpMenu.add(MenuItemtwentysecond); } public void MenuItemFirst_actionPerformed(ActionEvent e) { if (!txashow.getText().equals("")) { //当记事本中有内容时，点击新建，弹出是否想保存文件对话框， int j = JOptionPane.showConfirmDialog(this, "文件"+this.getTitle()+"的文字已经改变\n想保存文件吗?","记事本",JOptionPane.INFORMATION_MESSAGE); //0表示是,1表示否，2表示撤销 if (j == 0) { //当点击是，弹出保存对话框 int k = fcselect.showSaveDialog(this); //k为0表示保存，k为1表示撤销 if (k == 0) { //保存是按照存储路径和文件名来保存的 /*获取存储路径fcselect.getCurrentDirectory(); 存储路径，方法的返回值是一个File类 获取文件名 fcselect.getSelectedFile().getName() 在存储路径下，将文件以文件名存放*/ try { BufferedWriter bw = new BufferedWriter(new FileWriter( fcselect.getCurrentDirectory().toString() + fcselect.getSelectedFile().getName())); bw.write(txashow.getText()); bw.flush(); txashow.setText(""); } catch (IOException ex) { ex.print