谁能给我一个JAVA编写记事本的源代码?

谁能给我一个JAVA编写记事本的源代码?

给你 你也看不懂，还是从基础学起好。

看一下吧，功能比较简单 //MyTextPad.java //javac -d ../classes MyTextPad.java //java -classpath ../classes MyTextPad import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.io.*; //import MyWindowListener; public class MyTextPad extends JFrame implements ActionListener { private Container c; JMenuBar menuBar=new JMenuBar(); private JMenu fileMenu; private JTextArea ta=new JTextArea(); private JMenuItem newMenu,openMenu,saveMenu,saveasMenu,exitMenu; private static int opencount=0; JFileChooser fc =new JFileChooser("."); public MyTextPad() { super("MyTextPad"); c=getContentPane(); setJMenuBar(menuBar); fileMenu=new JMenu("文件"); newMenu=new JMenuItem("新建"); openMenu=new JMenuItem("打开"); saveMenu=new JMenuItem("保存"); saveasMenu=new JMenuItem("另存为"); exitMenu=new JMenuItem("退出"); c.add(ta,BorderLayout.NORTH); c.add(new JScrollPane(ta)); menuBar.add(fileMenu); fileMenu.add(newMenu); fileMenu.add(openMenu); fileMenu.add(saveMenu); fileMenu.add(saveasMenu); fileMenu.add(exitMenu); newMenu.addActionListener(this); openMenu.addActionListener(this); saveMenu.addActionListener(this); saveasMenu.addActionListener(this); exitMenu.addActionListener(this); opencount++; setSize(480,600); setVisible(true); } public void actionPerformed(ActionEvent e) { if(e.getSource()==newMenu) { MyTextPad mtpnew = new MyTextPad(); mtpnew.addWindowListener(new MyWindowListener() ); } else if(e.getSource()==openMenu) { int returnVal = fc.showOpenDialog(this); if(returnVal == JFileChooser.APPROVE_OPTION) { try{ BufferedReader in=new BufferedReader(new FileReader(fc.getSelectedFile())); String s=in.readLine(); while(s!=null){ ta.append(s); s=in.readLine(); ta.append("\n"); } in.close(); }catch(IOException ex) { JOptionPane.showMessageDialog(null,ex.getMessage(),"对话框",JOptionPane.PLAIN_MESSAGE); } } } else if(e.getSource()==saveMenu) { int returnval=fc.showSaveDialog(this); if(returnval==JFileChooser.APPROVE_OPTION) try{ BufferedWriter out=new BufferedWriter(new FileWriter(fc.getSelectedFile())); out.write(ta.getText()); out.close(); }catch(IOException ex) { JOptionPane.showMessageDialog(null,ex.getMessage(),"对话框",JOptionPane.PLAIN_MESSAGE); } } else if(e.getSource()==saveasMenu) { //String title; //title =mtp.gettitle()+".txt"; int returnval=fc.showSaveDialog(this); if(returnval==JFileChooser.APPROVE_OPTION) try{ BufferedWriter out=new BufferedWriter(new FileWriter(fc.getSelectedFile())); out.write(ta.getText()); out.close(); }catch(IOException ex) { JOptionPane.showMessageDialog(null,ex.getMessage(),"对话框",JOptionPane.PLAIN_MESSAGE); } } else if(e.getSource()==exitMenu) { if(opencount>0) { JOptionPane.showMessageDialog(null,"您将退出整个程序","提示",1); System.exit(1); } else System.exit(1); } } public static void main(String[] args) { MyTextPad mtp = new MyTextPad(); mtp.addWindowListener(new MyWindowListener() ); } } class MyWindowListener extends WindowAdapter { public void windowClosing(WindowEvent e) { System.exit(1); } }