菜单，监听器事件，适配器事件的使用

[color=blue]import java.awt.FileDialog;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTextArea;

public class EditText {
static String filepath;
static JFrame frame = new JFrame("文本编辑器");
static TextArea tf = new TextArea("",30,40,TextArea.SCROLLBARS_BOTH);
//TextArea(String text, int rows,int columns, int scrollbars)scrollbars
//参数值提供的常量： SCROLLBARS_BOTH, SCROLLBARS_VERTICAL_ONLY, SCROLLBARS_HORIZONTAL_ONLY, SCROLLBARS_NONE.


static JMenuBar menubar=new JMenuBar();

static JMenu menuFile=new JMenu("文件");
JMenu menuEdit=new JMenu("编辑");
JMenu menuLook=new JMenu("查看");
JMenu menuTool=new JMenu("工具");
JMenu menuDoc=new JMenu("文档");

static JMenuItem newFile=new JMenuItem("新建          Ctrl+N");
static JMenuItem Open=new JMenuItem("打开          Ctrl+O");
JMenuItem Save=new JMenuItem("保存          Ctrl+S");
JMenuItem Lsave=new JMenuItem("另存为          Shift+Ctrl+S");

JMenuItem Cut=new JMenuItem("剪切         Ctrl+X");
JMenuItem Copy=new JMenuItem("复制         Ctrl+C");
JMenuItem Paste=new JMenuItem("粘贴         Ctrl+V");
JMenuItem delete=new JMenuItem("删除         Ctrl+D");

JMenuItem ToolItem=new JMenuItem("工具栏                ");
JMenuItem zt=new JMenuItem("状态栏                ");
JMenuItem cb=new JMenuItem("测边栏                ");
JMenuItem tc=new JMenuItem("突出显示模式                ");

JMenuItem Doctongji=new JMenuItem("文档统计         ");

JMenuItem Docsave=new JMenuItem("文档保存         ");
public EditText(){
  frame.setSize(600,500);
  frame.setVisible(true);
  frame.add(tf);
  frame.setJMenuBar(menubar);
 
  menubar.add(menuFile);
  menubar.add(menuEdit);
  menubar.add(menuLook);
  menubar.add(menuTool);
  menubar.add(menuDoc);
 
  menuFile.add(newFile);
  menuFile.add(Open);
  menuFile.add(Save);
  menuFile.add(Lsave);
 
  menuEdit.add(Cut);
  menuEdit.add(Copy);
  menuEdit.add(Paste);
  menuEdit.add(delete);
 
  menuLook.add(ToolItem);
  menuLook.add(zt);
  menuLook.add(cb);
  menuLook.add(tc);
 
  menuTool.add(Doctongji);
  menuDoc.add(Docsave);
}

public static void main(String[] args) {
  Open.addActionListener(new ActionListener(){//打开一个文件

   public void actionPerformed(ActionEvent e) {
   BufferedReader br=null;
   FileDialog dialog=new FileDialog(new JFrame(),"打开 指定文件 ",FileDialog.LOAD);
   dialog.setVisible(true);
   filepath=dialog.getDirectory()+dialog.getFile();
   File file=new File(filepath);
   try {
    br=new BufferedReader(new FileReader((file)));
    String content;
    StringBuffer sb=new StringBuffer();
    while((content=br.readLine())!=null){
     sb.append(content+"\n");
    }
    tf.setText(sb.toString());
   } catch (Exception e1) {
    e1.printStackTrace();
   }
   finally{
    try {
     if(br!=null){
     br.close(); }
    
    } catch (IOException e1) {
     // TODO Auto-generated catch block
     e1.printStackTrace();
    }
   }
   }});
 
  new EditText();

}

}










































//鼠标事件：
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import javax.swing.JFrame;

public class MouseTest {

/**
  * @param args
  */
public static void main(String[] args) {
  // TODO Auto-generated method stub
   JFrame frame = new JFrame("窗口关闭");
   frame.setSize(300, 200);
   frame.setVisible(true);
   frame.addMouseListener(new MouseListener(){

   public void mouseClicked(MouseEvent e) {
    // TODO Auto-generated method stub
    int x=e.getX();
    int y=e.getY();
    System.out.println("x坐标"+x);
    System.out.println("y坐标"+y);
   }

   public void mouseEntered(MouseEvent e) {
    // TODO Auto-generated method stub
   
   }

   public void mouseExited(MouseEvent e) {
    // TODO Auto-generated method stub
   
   }

   public void mousePressed(MouseEvent e) {
    // TODO Auto-generated method stub
   
   }

   public void mouseReleased(MouseEvent e) {
    // TODO Auto-generated method stub
   
   }
   
   } );
}

}




import java.awt.BorderLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import javax.swing.JFrame;
import javax.swing.JTextField;

public class MouseTest {

/**
  * @param args
  */
public static void main(String[] args) {
  // TODO Auto-generated method stub
   JFrame frame = new JFrame("窗口关闭");
   frame.setSize(300, 200);
   frame.setVisible(true);
  
   final JTextField tf = new JTextField();
   frame.add(tf,BorderLayout.NORTH);
   frame.pack();
   frame.addMouseMotionListener(new MouseMotionListener(){
    public void mouseMoved(MouseEvent e) {
     // TODO Auto-generated method stub
     int x=e.getX();
     int y=e.getY();
     tf.setText("x="+x+"  "+"y="+y);
    }

    public void mouseDragged(MouseEvent e) {
     // TODO Auto-generated method stub
    
    }
    

   } );
}

}



import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;


public class KeyTest {

/**
  * @param args
  */
public static void main(String[] args) {
  // TODO Auto-generated method stub
   JFrame frame = new JFrame("窗口关闭");
   frame.setSize(300, 200);
   frame.setVisible(true);
   frame.addKeyListener(new KeyListener(){

   public void keyPressed(KeyEvent e) {
    // TODO Auto-generated method stub
    System.out.println("按下键盘");
   }

   public void keyReleased(KeyEvent e) {
    // TODO Auto-generated method stub
    System.out.println( "keyReleased(");
   }

   public void keyTyped(KeyEvent e) {
    // TODO Auto-generated method stub
    System.out.println("keyTyped");
   }
   
   } );
}

}











































import java.awt.BorderLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseMotionListener;

import javax.swing.JFrame;
import javax.swing.JTextField;

public class MouseTest extends MouseMotionAdapter{
static JFrame frame = new JFrame("窗口关闭");

static JTextField tf = new JTextField();

public MouseTest() {
  frame.setSize(300, 200);
  frame.setVisible(true);
  frame.add(tf, BorderLayout.NORTH);
  frame.addMouseMotionListener(this);
  frame.pack();
}

public static void main(String[] args) {
  // TODO Auto-generated method stub
      new MouseTest();
}

public void mouseMoved(MouseEvent e) {
  // TODO Auto-generated method stub
  int x = e.getX();
  int y = e.getY();
  tf.setText("x=" + x + "  " + "y=" + y);
}

}[/color]