JFrame实现图片的拖拽

java 面板实现图片的拖拽，效果还不错。代码直接拷过去就能看到效果了。

package com.conmon.myTest;

import java.awt.Color;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;

import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;



public class TestMoveImage {
	
	 static int x,y;
	 private static int num=0;
	 private static Icon icon=null;
	 
	 public static void main(String[] args) throws Exception{
		 
	  JFrame f = new JFrame();
	  f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	  f.getContentPane().setLayout(null);//这个要设置成 null
	  //图片
	  icon = new ImageIcon("F:/1353411350203.jpg");   //注：用斜杆系统会默认帮你转化为反斜杠，若是要用反斜杠则要写成：F:\\1353411350203.jpg

	  JLabel l = new JLabel(icon); //建立具备指定图像的 JLabel 实例。
	  l.setSize(icon.getIconWidth(),icon.getIconHeight());//设置面板的宽度和高度
	  l.setBorder(BorderFactory.createLineBorder(Color.red));//给图片加上红色外框
	  
	  f.getContentPane().add(l);
	  f.setSize(180,180);
	  f.setVisible(true);
	 
	  l.addMouseListener(new MouseAdapter(){
	   public void mousePressed(MouseEvent e){
	    x=e.getX();
	    y=e.getY();
	   }
	  });

	  l.addMouseMotionListener(new MouseMotionListener(){
	   public void mouseDragged(MouseEvent e) {
	    JLabel l = (JLabel)e.getSource();
	    l.setLocation(l.getX()+e.getX()-x,l.getY()+e.getY()-y);
	   }
	   public void mouseMoved(MouseEvent e) {}
	  });
	}
}