java简单记事本代码合集

//import java packages import java.awt.*; import java.awt.event.*; import java.text.*; import java.util.*; import java.io.*; import javax.swing.undo.*; import javax.swing.border.*; import javax.swing.*; import javax.swing.text.*; import javax.swing.event.*; import java.awt.datatransfer.*; class Notepad extends JFrame implements ActionListener,DocumentListener{ //定义变量 //菜单 JMenu fileMenu,editMenu,formatMenu,viewMenu,helpMenu; //"文件"的菜单项 JMenuItem fileMenu_New,fileMenu_Open,fileMenu_Save,fileMenu_SaveAs,fileMenu_PageSetup,fileMenu_Print,fileMenu_Exit; //"编辑"的菜单项 JMenuItem editMenu_Undo,editMenu_Redo,editMenu_Cut,editMenu_Copy,editMenu_Paste,editMenu_Delete,editMenu_Find,editMenu_FindNext,editMenu_Replace, editMenu_GoTo,editMenu_SelectAll,editMenu_TimeDate; //"格式"的菜单项 JCheckBoxMenuItem formatMenu_LineWrap; JMenu formatMenu_Color; JMenuItem formatMenu_Font,formatMenu_Color_FgColor,formatMenu_Color_BgColor; //"查看"的菜单项 JCheckBoxMenuItem viewMenu_Status; //"帮助"的菜单项 JMenuItem helpMenu_HelpTopics,helpMenu_About; //文本编辑区域 JTextArea editArea; //状态栏标签 JLabel statusLabel; //弹出菜单及菜单项 JPopupMenu popupMenu; JMenuItem popupMenu_Undo,popupMenu_Redo,popupMenu_Cut,popupMenu_Copy,popupMenu_Paste,popupMenu_Delete,popupMenu_SelectAll; //系统剪贴板 Toolkit toolKit=Toolkit.getDefaultToolkit(); Clipboard clipBoard=toolKit.getSystemClipboard(); //其它变量 boolean isNewFile=true; //是否新文件(未保存过的) File currentFile; //当前文件名 String oldValue; //存放编辑区原来的内容，用于比较文本是否有改动 JButton fontOkButton; //字体设置里的"确定"按钮 //工具栏按钮 JButton newButton,openButton,saveButton,saveAsButton,printButton,undoButton,redoButton, cutButton,copyButton,pasteButton,deleteButton,searchButton,timeButton,fontButton, boldButton,italicButton,fgcolorButton,bgcolorButton,helpButton; //创建撤消操作管理器 protected UndoManager undo = new UndoManager(); protected UndoableEditListener undoHandler = new UndoHandler(); //设置编辑区默认字体 protected Font defaultFont=new Font("宋体",Font.PLAIN,12); //构造函数开始 public Notepad() { super("黄斌的记事本"); //获取容器 Container container=getContentPane(); //创建菜单条 JMenuBar menuBar = new JMenuBar(); //创建文件菜单及菜单项并注册事件监听 JMenu fileMenu = new JMenu("文件(F)", true); fileMenu.setMnemonic('F'); fileMenu_New = new JMenuItem("新建(N)", 'N'); fileMenu_New.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK)); fileMenu_New.addActionListener(this); fileMenu_Open = new JMenuItem("打开(O)...", 'O'); fileMenu_Open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK)); fileMenu_Open.addActionListener(this); fileMenu_Save = new JMenuItem("保存(S)", 'S'); fileMenu_Save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK)); fileMenu_Save.addActionListener(this); fileMenu_SaveAs = new JMenuItem("另存为(A)...", 'A'); fileMenu_SaveAs.addActionListener(this); fileMenu_PageSetup = new JMenuItem("页面设置(U)...",'U'); fileMenu_PageSetup.addActionListener(this); fileMenu_Print = new JMenuItem("打印(P)...", 'P'); fileMenu_Print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK)); fileMenu_Print.addActionListener(this); fileMenu_Exit = new JMenuItem("退出(X)",'X'); fileMenu_Exit.addActionListener(this); //创建编辑菜单及菜单项并注册事件监听 JMenu editMenu = new JMenu("编辑(E)", true); editMenu.setMnemonic('E'); editMenu.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e){ checkMenuItemEnabled();//设置剪切、复制、粘贴、删除等功能的可用性 } } ); editMenu_Undo = new JMenuItem("撤消(U)",'U'); editMenu_Undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_MASK)); editMenu_Undo.addActionListener(this); editMenu_Undo.setEnabled(false); editMenu_Redo = new JMenuItem("重做(R)",'R'); editMenu_Redo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Y,InputEvent.CTRL_MASK)); editMenu_Redo.addActionListener(this); editMenu_Redo.setEnabled(false); editMenu_Cut = new JMenuItem("剪切(T)",'T'); editMenu_Cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.CTRL_MASK)); editMenu_Cut.addActionListener(this); editMenu_Copy = new JMenuItem("复制(C)",'C'); editMenu_Copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK)); editMenu_Copy.addActionListener(this); editMenu_Paste = new JMenuItem("粘贴(P)",'P'); editMenu_Paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK)); editMenu_Paste.addActionListener(this); editMenu_Delete = new JMenuItem("删除(L)",'L'); editMenu_Delete.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0)); editMenu_Delete.addActionListener(this); editMenu_Find = new JMenuItem("查找(F)...",'F'); editMenu_Find.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, InputEvent.CTRL_MASK)); editMenu_Find.addActionListener(this); editMenu_FindNext = new JMenuItem("查找下一个(N)",'N'); editMenu_FindNext.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0)); editMenu_FindNext.addActionListener(this); editMenu_Replace = new JMenuItem("替换(R)...",'R'); editMenu_Replace.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, InputEvent.CTRL_MASK)); editMenu_Replace.addActionListener(this); editMenu_GoTo = new JMenuItem("转到(G)...",'G'); editMenu_GoTo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G, InputEvent.CTRL_MASK)); editMenu_GoTo.addActionListener(this); editMenu_SelectAll = new JMenuItem("全选",'A'); editMenu_SelectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK)); editMenu_SelectAll.addActionListener(this); editMenu_TimeDate = new JMenuItem("时间/日期(D)",'D'); editMenu_TimeDate.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,0)); editMenu_TimeDate.addActionListener(this); //创建格式菜单及菜单项并注册事件监听 JMenu formatMenu = new JMenu("格式(O)", true); formatMenu.setMnemonic('O'); formatMenu_LineWrap = new JCheckBoxMenuItem("自动换行(W)"); formatMenu_LineWrap.setMnemonic('W'); formatMenu_LineWrap.setState(true); formatMenu_LineWrap.addActionListener(this); formatMenu_Font = new JMenuItem("字体(F)...",'F'); formatMenu_Font.addActionListener(this); formatMenu_Color = new JMenu("设置颜色"); formatMenu_Color_FgColor=new JMenuItem("字体颜色"); formatMenu_Color_FgColor.addActionListener(this); formatMenu_Color_BgColor=new JMenuItem("背景颜色"); formatMenu_Color_BgColor.addActionListener(this); //创建查看菜单及菜单项并注册事件监听 JMenu viewMenu = new JMenu("查看(V)", true); viewMenu.setMnemonic('V'); viewMenu_Status = new JCheckBoxMenuItem("状态栏(S)"); viewMenu_Status.setMnemonic('S'); viewMenu_Status.setState(true); viewMenu_Status.addActionListener(this); //创建帮助菜单及菜单项并注册事件监听 JMenu helpMenu = new JMenu("帮助(H)", true); helpMenu.setMnemonic('H'); helpMenu_HelpTopics = new JMenuItem("帮助主题(H)",'H'); helpMenu_HelpTopics.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F1,0)); helpMenu_HelpTopics.addActionListener(this); helpMenu_About = new JMenuItem("关于记事本(A)",'A'); helpMenu_About.addActionListener(this); //向菜单条添加"文件"菜单及菜单项 menuBar.add(fileMenu); fileMenu.add(fileMenu_New); fileMenu.add(fileMenu_Open); fileMenu.add(fileMenu_Save); fileMenu.add(fileMenu_SaveAs); fileMenu.addSeparator(); //分隔线 fileMenu.add(fileMenu_PageSetup); fileMenu.add(fileMenu_Print); fileMenu.addSeparator(); //分隔线 fileMenu.add(fileMen