JTree 结点怎么添加事件

[wisoper]

一个树状菜单的例子。
歌手
专辑1
专辑2

每当单击专辑则刷新专辑曲目（在一个JPANEL）
问下JTree的结点怎么添加事件

[降龙]

网上看到的一段代码，应该可以满足你的需求。。。。（添加TreeSelectionListener事件也应该行得通）

import java.awt.BorderLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.ScrollPaneConstants;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;

public class MainClass {

	public static void main(String[] a) {
		JFrame f = new JFrame();
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		f.add(new JTreeEvents());
		f.setSize(500, 500);
		f.setVisible(true);
	}
}

class JTreeEvents extends JPanel {
	JTree tree;

	JTextField jtf;

	public JTreeEvents() {
		setLayout(new BorderLayout());
		DefaultMutableTreeNode top = new DefaultMutableTreeNode("Options");

		DefaultMutableTreeNode a = new DefaultMutableTreeNode("A");
		top.add(a);

		a.add(new DefaultMutableTreeNode("A1"));
		a.add(new DefaultMutableTreeNode("A2"));

		DefaultMutableTreeNode b = new DefaultMutableTreeNode("B");
		top.add(b);

		b.add(new DefaultMutableTreeNode("B1"));
		b.add(new DefaultMutableTreeNode("B2"));
		b.add(new DefaultMutableTreeNode("B3"));

		tree = new JTree(top);

		int v = ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
		int h = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
		JScrollPane jsp = new JScrollPane(tree, v, h);

		add(jsp, BorderLayout.CENTER);

		jtf = new JTextField("", 20);
		add(jtf, BorderLayout.SOUTH);

		tree.addMouseListener(new MouseAdapter() {
			public void mouseClicked(MouseEvent me) {
				doMouseClicked(me);
			}
		});
	}

	void doMouseClicked(MouseEvent me) {
		TreePath tp = tree.getPathForLocation(me.getX(), me.getY());
		if (tp != null)
			jtf.setText(tp.toString());
		else
			jtf.setText("");
	}
}

[wisoper]

   void doMouseClicked(MouseEvent me) {
        TreePath tp = tree.getPathForLocation(me.getX(), me.getY());
        if (tp != null)
            jtf.setText(tp.toString());
        else
            jtf.setText("");
    }

能给这段代码给加点注释吗