请问一个JPopupMenu的问题

Question

响应鼠标事件，你可以得到鼠标事件的位置，这样你就可以根据这个位置调用JTree.getRowForLocation(int x, int y)得到JTree上相应的节点。接下来的事情就不用我多说了吧。

Answer 1

popup=new JPopupMenu();
    popup.add(cutAction);
    popup.add(copyAction);
    popup.add(pasteAction);    getContentPane().addMouseListener(new MouseAdapter()
                                      {
                                        public void mouseReleased(MouseEvent event)
                                            {
                                              if(event.isPopupTrigger())
                                                popup.show(event.getComponent(),event.getX(),event.getY());
                                            }
                                      });