java swing左邊樹圖，當點擊任意節點時，右邊顯示顯示數據， 求壹個簡單的源碼例子

import?java.awt.Container;

import?java.awt.Dimension;

import?javax.swing.JFrame;

import?javax.swing.JLabel;

import?javax.swing.JPanel;

import?javax.swing.JTree;

import?javax.swing.event.TreeSelectionEvent;

import?javax.swing.event.TreeSelectionListener;

import?javax.swing.tree.DefaultMutableTreeNode;

public?class?TestSwingTree?extends?JFrame?{

private?JPanel?p;

public?TestSwingTree(String?title){

super(title);

}

public?void?init(){

Container?c?=?this.getContentPane();

DefaultMutableTreeNode?root?=?new?DefaultMutableTreeNode("root");

DefaultMutableTreeNode?child1?=?new?DefaultMutableTreeNode("child1");

DefaultMutableTreeNode?child11?=?new?DefaultMutableTreeNode("child11");

DefaultMutableTreeNode?child12?=?new?DefaultMutableTreeNode("child12");

DefaultMutableTreeNode?child2?=?new?DefaultMutableTreeNode("child2");

DefaultMutableTreeNode?child3?=?new?DefaultMutableTreeNode("child3");

DefaultMutableTreeNode?child31?=?new?DefaultMutableTreeNode("child31");

root.add(child1);

root.add(child2);

root.add(child3);

child1.add(child11);

child1.add(child12);

child3.add(child31);

JTree?tree?=?new?JTree(root);

tree.setPreferredSize(new?Dimension(120,?400));

tree.addTreeSelectionListener(new?TreeSelectionListener()?{

public?void?valueChanged(TreeSelectionEvent?e)?{

p.removeAll();

JLabel?l?=?new?JLabel(e.getPath().toString());

l.setBounds(5,?190,?170,?20);

p.add(l);

p.repaint();

}

});

c.add(tree,BorderLayout.WEST);

p?=?new?JPanel();

p.setLayout(null);

p.setPreferredSize(new?Dimension(180,?400));

c.add(p,BorderLayout.CENTER);

this.setLocation(400,?300);

this.setSize(300,?400);

this.setResizable(false);

this.setVisible(true);

this.setDefaultCloseOperation(this.DISPOSE_ON_CLOSE);

}

public?static?void?main(String[]?args)?{

new?TestSwingTree("Test?Swing?Jtree").init();

}

}