Code Samples from the Java Developers Almanac 2000

 
 // The following 3 lines of code must be 
 // on the same line
 
 public class DraggableComponent extends JComponent 
   implements DragGestureListener, 
   DragSourceListener {
     DragSource dragSource;
     
     public DraggableComponent() {
       dragSource = new DragSource();
       dragSource.createDefaultDragGestureRecognizer(
         this, DnDConstants.ACTION_COPY_OR_MOVE, this);
     }
     public void dragGestureRecognized(
       DragGestureEvent evt) {
         Transferable t = new StringSelection(
           "aString");
         dragSource.startDrag (
           evt, DragSource.DefaultCopyDrop, t, this);
     }
     public void dragEnter(DragSourceDragEvent evt) {
     // Called when the user is dragging this drag 
     // source and enters the drop target.
     }
     public void dragOver(DragSourceDragEvent evt) {
     // Called when the user is dragging this drag 
     // source and moves over the drop target.
     }
     public void dragExit(DragSourceEvent evt) {
     // Called when the user is dragging this drag 
     // source and leaves the drop target.
     }
     public void dropActionChanged(
       DragSourceDragEvent evt) {
         // Called when the user changes the drag 
         // action between copy or move.
     }
     public void dragDropEnd(DragSourceDropEvent evt) {
     // Called when the user finishes or cancels 
     // the drag operation.
     }
 }