帮帮忙，如何在JTree的节点上单击右键弹出一个菜单

Question

如题

Answer 1

对树的TreeNode结点注册mouseCliked事件处理函数.

Answer 2

i think you need popup menu. there is such a class in java swing.

Answer 3

刚好手头有个例子,希望对你有帮助//......
//......
     tree.addMouseListener(new MouseAdapter()
      {
          public void mousePressed(MouseEvent event)
          {
              if(((event.getModifiers() & InputEvent.BUTTON3_MASK)!=0) && (tree.getSelectionCount()>0))
              {
                 showMenu(event.getX(),event.getY());
              }
          }
      }
     );
   
   }
   
   protected void showMenu(int x,int y)
   {
      JPopupMenu popup=new JPopupMenu();
      JMenuItem mi=new JMenuItem("do something");
      TreePath path=tree.getSelectionPath();
      Object node=path.getLastPathComponent();
      if(node==tree.getModel().getRoot())
      {
        mi.setEnabled(false);
      }
      popup.add(mi);
      mi.addActionListener(new ActionListener()
         {
             public void actionPerformed(ActionEvent event)
             {
                 //do your work here
             }
         }
      )   
      ;
     popup.show(tree,x,y);   
   }

Answer 4

midlet 的 e 文好棒!