JavaSwing JTree树怎么获取选中节点值

package Tree;

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.border.EmptyBorder;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.JScrollPane;
import javax.swing.JTextField;


public class AppDemo extends JFrame {

    private JPanel contentPane;

    private JTextField textField;

    public static void main(String[] args) {

//        EventQueue.invokeLater(new Runnable() {
//
//            public void run() {
//
//                try {
//
//                    AppDemo frame = new AppDemo();
//
//                    frame.setVisible(true);
//
//                } catch (Exception e) {
//                    e.printStackTrace();
//                }
//            }
//        });

        new AppDemo();
    }

    public AppDemo() {

//        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setBounds(100, 100, 450, 300);

        setTitle("测试");

        contentPane = new JPanel();

        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

        setContentPane(contentPane);

        contentPane.setLayout(null);

        JScrollPane scrollPane = new JScrollPane();

        scrollPane.setBounds(30, 20, 196, 217);

        contentPane.add(scrollPane);

        final JTree tree = new JTree();

        scrollPane.setViewportView(tree);

        textField = new JTextField();

        textField.setBounds(252, 35, 172, 27);

        contentPane.add(textField);

        this.setVisible(true);

        tree.addTreeSelectionListener(new TreeSelectionListener() {

            public void valueChanged(TreeSelectionEvent e) {

                DefaultMutableTreeNode note = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();

                String name = note.toString();//获得这个结点的名称

                textField.setText(name);

            }
        });
    }
}

参考链接
​​​https://zhidao.baidu.com/question/746015792869057252.html​​