请教：在JTree上怎样实现直接右击（而不用先左击选中再右击）一节点就弹出popUpMenu？

Question

上面的代码有点乱，还有一个小疏忽（应该为叶节点时才弹出菜单），重贴一编：MouseListener treeMouseListener = new MouseAdapter() {
    public void mouseReleased(MouseEvent e) {
      if (e.isPopupTrigger() &&tree.getRowForLocation(e.getX(), e.getY())!= -1) {
        treeNode = (DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
        if (treeNode.isLeaf()) 
          popupMenu.show(e.getComponent(), e.getX(), e.getY());
      }
    }
  };

Answer 1

还是乱啊，删叶删不掉。不好意思，再贴一编：MouseListener treeMouseListener = new MouseAdapter() {
  public void mouseReleased(MouseEvent e) {
    if(e.isPopupTrigger() &&tree.getRowForLocation(e.getX(), e.getY())!= -1){
      treeNode=(DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
        if (treeNode.isLeaf()) 
          popupMenu.show(e.getComponent(), e.getX(), e.getY());
      }
    }
  };这回应该差不多了吧？

Answer 2

if (SwingUtilities.isRightMouseButton(e))
{
    treeNode=(DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
    if (treeNode.isLeaf()) 
        popupMenu.show(e.getComponent(), e.getX(), e.getY());
}

Answer 3

重载MouseAdapter的mousePressed()方法，判断为右键时，setSelectionPathgetPathForLocation(e.getX(), e.getY()));
然后处理弹出

Answer 4

写错了，应该是这样：
JTree tree = ...
tree.addMouseListener(new MouseAdapter()
{
    public void mouseClicked(MouseEvent e)
    {
        if (SwingUtilities.isRightMouseButton(e))
        {
            int selRow = formTree.getRowForLocation(x, y);
            if (selRow != -1)
            {
                TreePath selPath = formTree.getPathForLocation(x, y);
                if(selPath != null)
                {
                    formTree.setSelectionPath(selPath);
                    popupMenu.show(e.getComponent(), e.getX(), e.getY());
                }
            }
        }
    }
}