import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;

public class JTreeFrame extends JFrame
{
    private JTree tree;
    private DefaultTreeModel model;
    private DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
    private DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("node1");
    private DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("node2");
    private DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("node3");
    
    public JTreeFrame()
    {
        //添加各结点
        root.add(node1);
        root.add(node2);
        node1.add(node3);
        model = new DefaultTreeModel(root);
        tree = new JTree(model);
        
        //添加监听
        tree.addMouseListener(new MouseAdapter()
            {
                public void mouseClicked(MouseEvent event)
                {
                    if (event.getButton() == MouseEvent.BUTTON3)
                    {
                        JPopupMenu popupMenu = new JPopupMenu();
                        JMenuItem itemShow = new JMenuItem("弹出窗口按钮");
                        popupMenu.add(itemShow);
                        popupMenu.show(JTreeFrame.this, event.getX(), event.getY());
                    }
                }
            });
        
        //添加JTree
        add(new JScrollPane(tree));
    }
    
    public static void main(String[] args)
    {
        JFrame frame = new JTreeFrame();
        frame.setSize(400, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}