记事本的新建,打开,保存,另存为的实现.docVIP

这些代码只是实现了新建，打开，保存，和另存为的功能，同时存在着许多BUG，可以换不同的流试一试，仅供参考，求大神勿喷！！使用的编译工具是eclipse代码如下： import java.awt.BorderLayout; import java.awt.EventQueue; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; import javax.swing.JFileChooser; import javax.swing.JScrollPane; import javax.swing.JMenuBar; import javax.swing.JMenu; import javax.swing.JMenuItem; import javax.swing.KeyStroke; import javax.swing.UIManager; import java.awt.event.KeyEvent; import java.awt.event.InputEvent; import javax.swing.JTextArea; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; public class notepad extends JFrame { private JPanel contentPane; private JMenuBar menuBar; private JMenu mnf; private JMenuItem mntmo; private JMenuItem mntmn; private JMenuItem mntms; private JMenuItem mntma; private JScrollPane scrollPane; private JTextArea textArea; static notepad frame; boolean isNew=true; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); frame = new notepad(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public notepad() { initComponents(); } private void initComponents() { setTitle(\u65E0\u6807\u9898-\u8BB0\u4E8B\u672C); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 450, 300); menuBar = new JMenuBar(); setJMenuBar(menuBar); mnf = new JMenu(\u6587\u4EF6(F)); mnf.setMnemonic(F); menuBar.add(mnf); mntmn = new JMenuItem(\u65B0\u5EFA(N)); mntmn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {//新建的方法 frame.setTitle(未命名