Java写的简单文本编辑器代码[精品].doc

import java.awt.*; import java.awt.event.*; import java.io.*; 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; private int id_font ;//字体 String fileName = ;//上次保存后的文件名和地址 //构造函数 public Notepad(){ //框架 mainFrame = new Frame (Notepad v0.99 by Launching); mb = new MenuBar (); ta = new TextArea (30 ,60); ta.setFont( new Font ( Times New Rome , Font.PLAIN , 15)); ta.setBackground(new Color(0 , 250 , 200)); //菜单条 mFile = new Menu ( ); mEdit = new Menu ( 编辑); mFormat = new Menu (格式t); mHelp = new Menu (帮助); //文件 miNew = new MenuItem (); miOpen = new MenuItem (打开); miSave = new MenuItem (保存); miSaveAs = new MenuItem (另存为); miExit = new MenuItem (退出); //编辑 miCut = new MenuItem (); miCopy = new MenuItem (复制); miPaste = new MenuItem (粘贴); miDelete = new MenuItem (删除); //格式 miFont = new MenuItem (Font); miLowtoCapital = new MenuItem(Low to Capital); miCapitaltoLow = new MenuItem(Capital to Low); miEncrypt = new MenuItem(Encrypt); miDisencrypt = new MenuItem(Disencrypt); //帮助 miAboutNotepad = new MenuItem (关于 Notepad); //添加文件菜单项 mFile.add(miNew); mFile.add(miOpen); mFile.add(miSave); mFile.add(miSaveAs); mFile.add(miExit); //添加编辑菜单项 mEdit.add(miCut); mEdit.add(miCopy); mEdit.add(miPaste)