圖片的拖動效果 java

1、imptjava.awt.imptjava.awt.event.imptjavax.swing.imptjavax.swing.event.圖片的拖動效果publicclassaaextendsJFrameJLabeljlPic圖片，用于拖動publicaa()super(“圖片的拖動效果“)調(diào)用父類構(gòu)造函數(shù)Iconimage=newImageIcon(this.getClass().getResource(“6.GIF“))實例化圖標

2、jlPic=newJLabel(image)實例化帶圖片的標簽getContentPane().add(jlPic)增加標簽到容器上DragPicListenerlistener=newDragPicListener()鼠標事件處理jlPic.addMouseListener(listener)增加標簽的事件處理jlPic.addMouseMotionListener(listener)setSize(300200)設(shè)置窗口尺寸setV

3、isible(true)設(shè)置窗口為可視setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)關(guān)閉窗口時退出程序classDragPicListenerimplementsMouseInputListener鼠標事件處理Pointp=newPoint(00)坐標點publicvoidmouseMoved(MouseEvente)publicvoidmouseDragged(MouseEvente)Po

4、intnewP=SwingUtilities.convertPoint(jlPice.getPoint()jlPic.getParent())轉(zhuǎn)換坐標系統(tǒng)jlPic.setLocation(jlPic.getX()(newP.xp.x)jlPic.getY()(newP.yp.y))設(shè)置標簽的新位置p=newP更改坐標點publicvoidmouseReleased(MouseEvente)publicvoidmouseEntered(

5、MouseEvente)publicvoidmouseExited(MouseEvente)publicvoidmouseClicked(MouseEvente)publicvoidmousePressed(MouseEvente)p=SwingUtilities.convertPoint(jlPice.getPoint()jlPic.getParent())得到當前坐標點publicstaticvoidmain(String[]arg