java 记事本 类说明

public class Notepad /*implements ActionListener , MouseListener , MouseMotionListener , WindowListener , ItemListener , KeyListener, TextListener */
{
//成员变量
private Frame mainFrame;//主框架
private MenuBar mb ; //菜单条
private Menu mFile , mEdit , mFormat , mHelp ; //菜单：文件，编辑，格式，帮助
private MenuItem miNew , miOpen , miSave , miSaveAs , miExit ;//文件菜单项：新建，打开，保存，另存为，退出
private MenuItem miCut , miCopy , miPaste , miDelete ;//编辑菜单项：剪切，复制，粘贴，删除
private MenuItem miFont , miLowtoCapital, miCapitaltoLow ,miEncrypt , miDisencrypt;//格式菜单项：字体
private MenuItem miAboutNotepad;//帮助菜单项：关于记事本

private TextArea ta;//文本区

private String tempString;//临时字符串,用于存储需要复制粘贴的字符串

private boolean textValueChanged = false;

class MyItemListener_font implements ItemListener { //字体监听器
public void itemStateChanged(ItemEvent e) {
id_font = ((java.awt.List)e.getSource()).getSelectedIndex();
switch(

加我好友吧,我给你弄

在你安装的JDK目录下面有sun自己给的记事本源代码,路径是:
<你的目录>\jdk1.6.0_01\demo\jfc\Notepad
这里面就是记事本的源代码.

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
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.BorderFactory;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;