范例1

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JSplitPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;

public class JTreeTest extends JFrame {

    private JSplitPane split = new JSplitPane();

    private JTree tree = new JTree();

    private JLabel label = new JLabel();

    public JTreeTest() {
        this.getContentPane().add(this.split);
        this.split.setLeftComponent(this.tree);
        this.tree.addTreeSelectionListener(new TreeSelectionListener() {
            public void valueChanged(TreeSelectionEvent e) {
                label.setText(tree.getSelectionPath().getLastPathComponent().toString());
            }
        });
        this.split.setRightComponent(this.label);
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        JTreeTest jt = new JTreeTest();
        jt.setVisible(true);
        jt.setSize(300, 200);
        jt.setDefaultCloseOperation(EXIT_ON_CLOSE);
    }

}

范例2：

package com.boomlink.report.gui.chart.treetest.jsplitpane;

import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;

public class TestJTree {

?/**
? * @param args
? */
?public static void main(String[] args) {
??JFrame fr = new JFrame();
??fr.setSize(300, 500);
??fr.setDefaultCloseOperation(3);
??JSplitPane jp = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
??fr.getContentPane().add(jp);
??JTree jt = new JTree();
??jp.add(jt, JSplitPane.LEFT, 0);
??JTextArea ja = new JTextArea();
??jp.add(ja, JSplitPane.RIGHT, 1);
??// fr.getContentPane().add(jt);
??fr.setVisible(true);
??jt.addTreeSelectionListener(new MyTreeSelectionListener(ja, jt));
?}

}

class MyTreeSelectionListener implements TreeSelectionListener {
?JTextArea ja;
?JTree jt;

?public MyTreeSelectionListener(JTextArea ja, JTree jt) {
??this.ja = ja;
??this.jt = jt;
?}

?public void valueChanged(TreeSelectionEvent e) {
??ja.setText(jt.getSelectionPath().getLastPathComponent().toString());

?}

}