拖拽控件java版

Button vv = new Button("vvvv");
  DragSource.getDefaultDragSource().createDefaultDragGestureRecognizer(vv, DnDConstants.ACTION_MOVE, new DragGestureListener(){

   public void dragGestureRecognized(DragGestureEvent ee) {
 
    ee.startDrag(DragSource.DefaultMoveDrop,Toolkit.getDefaultToolkit().getSystemClipboard().getContents(this),new DragSourceListener(){

     public void dragDropEnd(DragSourceDropEvent dragsourcedropevent) {
      System.out.println("vvdragDropEnd");
     }

     public void dragEnter(DragSourceDragEvent dragsourcedragevent) {
      System.out.println("vvdragEnter");
     }

     public void dragExit(DragSourceEvent dragsourceevent) {
      System.out.println("vvdragExit");
     }

     public void dragOver(DragSourceDragEvent dragsourcedragevent) {
      System.out.println("vvdragOver");
     }

     public void dropActionChanged(DragSourceDragEvent dragsourcedragevent) {
      System.out.println("vvdropActionChanged");
     }});
   }});
  ///////////////////////////////////////////

Button b= new Button("bbbbb");
  new DropTarget(b,new DropTargetListener(){

   public void dragEnter(DropTargetDragEvent droptargetdragevent) {
    System.out.println("bbdragEnter");
   }

   public void dragExit(DropTargetEvent droptargetevent) {
    System.out.println("bbdragExit");
   }

   public void dragOver(DropTargetDragEvent droptargetdragevent) {
    System.out.println("bbdragOver");
    try {
     System.out.println(droptargetdragevent.getTransferable().getTransferData(DataFlavor.stringFlavor));
    } catch (Exception e) {
     e.printStackTrace();
    }
   }

   public void drop(DropTargetDropEvent droptargetdropevent) {
    System.out.println("bbdrop");
   }

   public void dropActionChanged(DropTargetDragEvent droptargetdragevent) {
    System.out.println("bbdropActionChanged");
   }});