java实现拖拽图片

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("D:\\imageJob\\~)82$ZKKY5`6A[]H3Y`V)V5.jpg");   //注：用斜杆系统会默认帮你转 化、为反斜杠，如果要用反斜杠则成：F:\\1353411350203.jpg                  JLabel l = new JLabel(icon); //创建具有指定图像的 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) {}              });            }}