keylistenerdemo.java

来自「精通Java核心技术源代码」· Java 代码 · 共 48 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
  
class KeyListenerDemo extends JFrame 
{
 		public KeyListenerDemo () 
  	  	{
  			addWindowListener (
          	new WindowAdapter() {
           		public void windowClosing(WindowEvent e) 
              	{
               		dispose();
     	        	System.exit(0);
  	  		  	}
  	       	}
        	);
		
        	addKeyListener (
          	new KeyListener(){
          	  	public void keyPressed(KeyEvent e) 
          	  	{
          	     	System.out.println(e);	
              	}
  
              	public  void keyReleased(KeyEvent e) 
              	{
                 	System.out.println(e) ;	
              	}
          
              	public  void keyTyped(KeyEvent e) 
              	{
             		System.out.println(e);
              	}
           	}
         	);	  		
       	}
  
  		public static void main(String args[]) 
       {
  		   System.out.println("Starting key...");
   	   	   KeyListenerDemo mainFrame = new KeyListenerDemo ();
  		   mainFrame.setSize(400, 400);
  		   mainFrame.setTitle("KeyListenerDemo ");
  		   mainFrame.setVisible(true);
  		}
  	}