Jtree基于鼠标点击获取对象？

Question

当双击鼠标时，我使用此代码片段在树上执行某些操作：打开一个窗口并获取鼠标双击的node，但它不会返回任何内容，它返回null：

MouseListener ml = new MouseAdapter() {
    public void mousePressed(MouseEvent e) {
        int selRow = contactTree.getRowForLocation(e.getX(), e.getY());
        TreePath selPath = contactTree.getPathForLocation(e.getX(), e.getY());
        System.out.println(contactTree.getEditingPath());
        Account memberToChat;
        if(selRow != -1) {
            if(e.getClickCount() == 1) {

            }
            else if(e.getClickCount() == 2) {
                new ChatWindow().setVisible(true);
                memberToChat=(Account)node.getUserObject(); // node is declared somewhere in the class as   DefaultMutableTreeNode node
                System.out.println(memberToChat.getFirstName()+" "+memberToChat.getEmail());
            }
        }
    }
};

Answer 1

• for JTree to set proper setSelectionMode

• 添加TreeSelectionListener

• TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION

的示例