mytexteditor.java

简单的文本编辑器,文件操作能够实现：新建文档、保存文档、打开文档、关闭文档、页面设置、打印预览、打印设置、打印等。编辑操作能够实现对文本内容的选择、剪切、复制、粘贴、查找、替换等。

package mytexteditor.texteditor;

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.lang.String;
import java.net.URL;


public class MyTextEditor extends javax.swing.JFrame 
{    
    // MyTextEditor类的 constructor，
    // 调用initComponents方法进行初始化
    
    public MyTextEditor()
    {
    	changed = false;
    	
    	initComponents();         
               
        setSize(500,300);
        
    } 
     
    // initComponents方法，由constructor调用，
    // 对的MyTextEditor各个GUI组件进行初始化。     
        
    private void initComponents()
    {      	  
    	    	
        textScrollPane = new javax.swing.JScrollPane();//创建滚动板对象 
        
        textBox = new javax.swing.JTextArea();  //创建文本区域对象
              
        tedMenuBar = new javax.swing.JMenuBar(); //创建菜单条对象
        
        toolBar = new JToolBar(); //创建工具条对象      
       
        createPopupMenu();  //创建弹出式菜单                  
                
        //创建file菜单及其菜单项对象
        
        fileMenu = new javax.swing.JMenu();        
        newMenuItem = new javax.swing.JMenuItem();        
        jSeparator1 = new javax.swing.JSeparator();        
        openMenuItem = new javax.swing.JMenuItem();        
        saveMenuItem = new javax.swing.JMenuItem();        
        saveAsMenuItem = new javax.swing.JMenuItem();        
        jSeparator2 = new javax.swing.JSeparator();        
        exitMenuItem = new javax.swing.JMenuItem();   
        
        //创建edit菜单及其菜单项对象    
        editMenu = new javax.swing.JMenu();        
        copyMenuItem = new javax.swing.JMenuItem();        
        pasteMenuItem = new javax.swing.JMenuItem();        
        cutMenuItem = new javax.swing.JMenuItem();        
        jSeparator3 = new javax.swing.JSeparator();        
        findMenuItem = new javax.swing.JMenuItem();      

        //创建setMenu菜单及其菜单项对象
        setMenu = new javax.swing.JMenu();        
        FcolorMenuItem = new javax.swing.JMenuItem();        
        BcolorMenuItem = new javax.swing.JMenuItem();
        
        //创建help菜单及其菜单项对象
        helpMenu = new javax.swing.JMenu();        
        aboutMenuItem = new javax.swing.JMenuItem();
        
                
        //设置TextEdit框架的标题
        
        setTitle("简单文本编辑器");
                
        //设置TextEdit框架的监听器
        
        addWindowListener(new java.awt.event.WindowAdapter(){
               public void windowClosing(java.awt.event.WindowEvent evt){
                   exitForm(evt);}
               });
               
        getAccessibleContext().setAccessibleName("MyTextEditor Frame");
        
        getAccessibleContext().setAccessibleDescription("MyTextEditor frame.");
        
        //设置工具条
        
        toolBaraddButtons(toolBar);
        
        getContentPane().add(toolBar, java.awt.BorderLayout.PAGE_START);
               
        //设置滚动板        
        
        textScrollPane.setViewportView(textBox);//把视口视图设为texBox
        
        textBox.getAccessibleContext().setAccessibleName("Text Box");
        
        textBox.getAccessibleContext().setAccessibleDescription("Text box.");    
        
        getContentPane().add(textScrollPane, java.awt.BorderLayout.CENTER);
                
        //文件菜单设置开始
             
        fileMenu.setMnemonic('f'); //file菜单的加速键的设置  
        
        fileMenu.setText("文件");  //file菜单的标题的设置 
        
        newMenuItem.setText("新建");     //new菜单项标题的设置      
   
        newMenuItem.setMnemonic('n'); //new菜单项键盘助记键的设置
        
        //new菜单项加速键的设置
                
        newMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
                                   java.awt.event.KeyEvent.VK_N, 
                                   java.awt.event.InputEvent.CTRL_MASK)
                                   );                                
       
        //new 菜单项监听器的设置  
             
        newMenuItem.addActionListener(new java.awt.event.ActionListener(){
             public void actionPerformed(java.awt.event.ActionEvent evt){
                newMenuItemActionPerformed(evt);}
             });
        
        fileMenu.add(newMenuItem); //将new菜单项加入到file菜单
        
        newMenuItem.getAccessibleContext().setAccessibleName("New Menu Item");
        
        newMenuItem.getAccessibleContext().setAccessibleDescription("New menu item.");
 
        fileMenu.add(jSeparator1);  //将分隔符加入到flie菜单中
        
        openMenuItem.setText("打开 ...");  //open菜单项标题的设置

        openMenuItem.setMnemonic('o');  //open菜单项键盘助记键的设置
        
        //open菜单项加速键的设置
        
        openMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
                                   java.awt.event.KeyEvent.VK_O,
                                   java.awt.event.InputEvent.CTRL_MASK ));        
        
        //添加open 菜单项的响应处理方法
          
        openMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
                  openMenuItemActionPerformed(evt);}
              });

        fileMenu.add(openMenuItem); //将open菜单项加入到file菜单
        
        openMenuItem.getAccessibleContext().setAccessibleName("Open Menu Item");
        
        openMenuItem.getAccessibleContext().setAccessibleDescription("Open menu item.");
       
        saveMenuItem.setText("保存"); //save菜单项的标题
        
        saveMenuItem.setMnemonic('s');//save 菜单项键盘助记键的设置
        
        // save菜单项加速键的设置
        
        saveMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
                                   java.awt.event.KeyEvent.VK_S, 
                                   java.awt.event.InputEvent.CTRL_MASK));
        
        //save菜单项监听器的设置
        
        saveMenuItem.addActionListener( new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
                  saveMenuItemActionPerformed(evt);}
              });

        fileMenu.add(saveMenuItem);//将save菜单项加入到file菜单
        
        saveMenuItem.getAccessibleContext().setAccessibleName("Save Menu Item");
        
        saveMenuItem.getAccessibleContext().setAccessibleDescription("Save menu item.");

        saveAsMenuItem.setText("另存为 ...");//saveAs菜单项标题
       
        saveAsMenuItem.setMnemonic('a');//saveAs菜单项键盘助记键的设置  
        
        //saveAs菜单项加速键的设置     
        
        saveAsMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
                                   java.awt.event.KeyEvent.VK_A, 
                                   java.awt.event.InputEvent.CTRL_MASK));
        
        //saveAs菜单项监听器的设置
        
        saveAsMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
                saveAsMenuItemActionPerformed(evt);}
              });

        fileMenu.add(saveAsMenuItem);// 把saveAs菜单项加入file菜单
        
        saveAsMenuItem.getAccessibleContext().setAccessibleName("Save As Menu Item");
        
        saveAsMenuItem.getAccessibleContext().setAccessibleDescription("Save As menu item.");

        fileMenu.add(jSeparator2); //添加分隔符
        
        exitMenuItem.setText("退出");//exti菜单项的标题

        exitMenuItem.setMnemonic('x');//exit菜单项的键盘助记键的设置
        
        //exit菜单项的加速键的设置
        
        exitMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
                                   java.awt.event.KeyEvent.VK_X, 
                                   java.awt.event.InputEvent.ALT_MASK));  
                                        
        //exit菜单项的监听器的设置
        
        exitMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
                exitMenuItemActionPerformed(evt);}
              });

        fileMenu.add(exitMenuItem);//把exit菜单项添加到file菜单
        
        exitMenuItem.getAccessibleContext().setAccessibleName("Exit Menu Item");
        
        exitMenuItem.getAccessibleContext().setAccessibleDescription("Exit menu item.");

        tedMenuBar.add(fileMenu);//添加file菜单
        
        fileMenu.getAccessibleContext().setAccessibleName("File Menu");
        
        fileMenu.getAccessibleContext().setAccessibleDescription("File menu.");
        
        //文件菜单设置结束    
              
        //编辑菜单设置开始
        editMenu.setText("编辑");  //edit菜单的标题                 
        editMenu.setMnemonic('e'); //edit菜单键盘助记键的设置 
       
        copyMenuItem.setText("复制"); //copy菜单项的标题     
        copyMenuItem.setMnemonic('c'); //copy菜单项键盘助记键的设置       
       
        //copy菜单项加速键的设
        copyMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
                                   java.awt.event.KeyEvent.VK_C,
                                   java.awt.event.InputEvent.CTRL_MASK));         
        
        //copy菜单项监听器的设置            
        copyMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
                copyMenuItemActionPerformed(evt);}
              });    
        
        editMenu.add(copyMenuItem); //添加copy菜单项到edit菜单
        copyMenuItem.getAccessibleContext().setAccessibleName("Copy Menu Item");
        copyMenuItem.getAccessibleContext().setAccessibleDescription("Copy menu item.");
        
        pasteMenuItem.setText("粘贴"); //paste菜单项的标题
        pasteMenuItem.setMnemonic('p'); //paste菜单项助记键的设置
        
        //paste菜单项加速键的设置
        pasteMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
        java.awt.event.KeyEvent.VK_V,
        java.awt.event.InputEvent.CTRL_MASK
        ));         
        
        //paste菜单项监听器的设置
             
        pasteMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
                pasteMenuItemActionPerformed(evt);}
              });
              
        editMenu.add(pasteMenuItem); //添加paste菜单项到edit菜单
        pasteMenuItem.getAccessibleContext().setAccessibleName("Paste Menu Item");
        pasteMenuItem.getAccessibleContext().setAccessibleDescription("Paste  menu item.");
        
        cutMenuItem.setText("剪切"); //cut菜单项的标题
        cutMenuItem.setMnemonic('x'); //cut菜单项键盘助记键的设置
        //cut菜单项的加速键的设置
        cutMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
        java.awt.event.KeyEvent.VK_X,
        java.awt.event.InputEvent.CTRL_MASK
        ));         
        
        //cut菜单项的监听器的设置           
        cutMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
                cutMenuItemActionPerformed(evt);}
              });
              
        editMenu.add(cutMenuItem); //添加cut菜单项到edit菜单
        cutMenuItem.getAccessibleContext().setAccessibleName("Cut Menu Item");
        cutMenuItem.getAccessibleContext().setAccessibleDescription("Cut  menu item.");
        
        editMenu.add(jSeparator3); //添加分隔符
        
        findMenuItem.setText("查找 ..."); //find菜单项的标题
        findMenuItem.setMnemonic('f'); //find菜单项的助记键的设置
        //find菜单项加速键的设置
        findMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
        java.awt.event.KeyEvent.VK_F,
        java.awt.event.InputEvent.CTRL_MASK
        ));  
                                   
        //find菜单项的监听器的设置              
        findMenuItem.addActionListener(new java.awt.event.ActionListener(){
            public void actionPerformed(java.awt.event.ActionEvent evt){
                findMenuItemActionPerformed(evt);}
        });
        
        editMenu.add(findMenuItem); //添加find菜单项到edit菜单
        findMenuItem.getAccessibleContext().setAccessibleName("Find Menu Item");
        findMenuItem.getAccessibleContext().setAccessibleDescription("Find menu item.");
   
        tedMenuBar.add(editMenu); //添加edit菜单
        editMenu.getAccessibleContext().setAccessibleName("Edit Menu");
        editMenu.getAccessibleContext().setAccessibleDescription("Edit menu.");
        
        //编辑菜单设置结束
        
        //设置菜单设置开始
        
        setMenu.setText("设置"); //set菜单的标题
        setMenu.setMnemonic('s'); //set菜单的助记键设置   
        
        FcolorMenuItem.setText("字体颜色 ...");//Fcolor菜单项的标题        
        FcolorMenuItem.setMnemonic('f'); //Fcolor菜单项的助记键设置
        
        //Fcolor菜单项的监听器  
        FcolorMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
              	     FcolorMenuItemActionPerformed(evt);
              	     }
              });

        setMenu.add(FcolorMenuItem); //添加Fcolor菜单项到set菜单
        FcolorMenuItem.getAccessibleContext().setAccessibleName("Fcolor Menu Item");
        FcolorMenuItem.getAccessibleContext().setAccessibleDescription("Fcolor menu item.");
    
        BcolorMenuItem.setText("背景颜色 ...");//Bcolor菜单项的标题        
        BcolorMenuItem.setMnemonic('b'); //Fcolor菜单项的助记键设置  
        
        //Bcolor菜单项的监听器  
        BcolorMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
              	     BcolorMenuItemActionPerformed(evt);
              	     }
              });

        setMenu.add(BcolorMenuItem);//添加Bcolor菜单项到set菜单
        BcolorMenuItem.getAccessibleContext().setAccessibleName("Bcolor Menu Item");
        BcolorMenuItem.getAccessibleContext().setAccessibleDescription("Bcolor menu item.");
      
        tedMenuBar.add(setMenu);//添加set菜单到菜单条
        setMenu.getAccessibleContext().setAccessibleName("Set Menu");
        setMenu.getAccessibleContext().setAccessibleDescription("Set menu.");
                
        //设置菜单设置结束
        
        //帮助菜单设置开始
        
        helpMenu.setText("帮助"); //help菜单的标题
        helpMenu.setMnemonic('h'); //help菜单的助记键设置
        
        aboutMenuItem.setText("关于 ..."); //about菜单项的标题
        aboutMenuItem.setMnemonic('a'); //about菜单项的助记键设置       
       
        //about菜单项的监听器的设置
        aboutMenuItem.addActionListener(new java.awt.event.ActionListener(){
              public void actionPerformed(java.awt.event.ActionEvent evt){
              	     aboutMenuItemActionPerformed(evt);}
              });

        helpMenu.add(aboutMenuItem); //添加about菜单项到help菜单
        aboutMenuItem.getAccessibleContext().setAccessibleName("About Menu Item");
        aboutMenuItem.getAccessibleContext().setAccessibleDescription("About menu item.");

        tedMenuBar.add(helpMenu);//添加help菜单到菜单条
        helpMenu.getAccessibleContext().setAccessibleName("Help Menu");
        helpMenu.getAccessibleContext().setAccessibleDescription("Help menu.");
        
        //帮助菜单设置结束