Java图片拖动源程序

package hyt; import java.awt.*; import javax.swing.*; import java.awt.event.*; public class ImagePanel extends JPanel implements MouseListener,MouseMotionListener { private Image pic; private int ox=0,oy=0; //图片起始位置 private int sx,sy,ex,ey; public ImagePanel(Image pic) { super(); this.pic = pic; this.addMouseListener(this); this.addMouseMotionListener(this); } public void paintComponent(Graphics arg0) { super.paintComponent(arg0); arg0.drawImage(pic,ox,oy,null); } public static void main(String[] args) { // TODO Auto-generated method stub } public void mouseClicked(MouseEvent arg0) { // TODO Auto-generated method stub } public void mouseEntered(MouseEvent arg0) { // TODO Auto-generated method stub } public void mouseExited(MouseEvent arg0) { // TODO Auto-generated method stub } public void mousePressed(MouseEvent arg0) { // TODO Auto-generated method stub this.setCursor(new Cursor(Cursor.MOVE_CURSOR)); sx=arg0.getX(); sy=arg0.getY(); } public void mouseReleased(MouseEvent arg0) { // TODO Auto-generated method stub this.setCursor(new Cursor(Cursor.DEFAULT_CURSOR)); } public void mouseDragged(MouseEvent arg0) { // TODO Auto-generated method stub ex=arg0.getX(); ey=arg0.getY(); ox=ox+ex-sx; oy=oy+ey-sy; sx=ex; sy=ey; this.repaint(); } public void mouseMoved(MouseEvent arg0) { // TODO Auto-generated method stub } }