JTree :检查选择级别

Question

我使用MouseAdapter检查JTree节点上的双击。我希望根据所选节点的级别进行一些不同的操作。如何查看节点级别？以下是监听程序的代码：

private MouseAdapter getMouseAdapter(JTree jtree) {
        final JTree tree = jtree;
        return new MouseAdapter() {

            @Override
            public void mousePressed(MouseEvent e) {
                TreePath selPath = tree.getPathForLocation(e.getX(), e.getY());
                if (selPath != null) {
                    if (e.getClickCount() == 2) {
                        String selectedNode = selPath.getLastPathComponent().toString();

              // >>>>>  check on which level of the tree this node is        
                    }
                }
            }};
    }

Answer 1

您可以通过首先调用selPath的getPath()方法并计算其长度来检查从selPath到树根的路径的长度。

Object[] array = selPath.getPath();
int depth = array.length;

Answer 2

TreePath path = tree.getSelectionPath();
int level = path.getPathCount();

请参阅TreePath manual page。