关于JTree改变节点图标的问题

吴锦波 2011-10-18 12:23:22

问题描述：
如上图，怎么样才能实现点击“改变”按钮后，就改变“广东”节点的图标呀？各位大侠请不吝赐教
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/*

 * To change this template, choose Tools | Templates

 * and open the template in the editor.

 */

package swing.demo;



import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTree;

import javax.swing.tree.DefaultMutableTreeNode;



/**

 *

 * @author Administrator

 */

public class TreeDemo    

{  

    JFrame frame = new JFrame("简单树");  

    JPanel panel = new JPanel(new GridLayout(2,1));

    JButton changeBtn = new JButton("关闭");

  

    JTree tree;  

    //定义几个初始节点   

    DefaultMutableTreeNode root = new DefaultMutableTreeNode("终端控制器");   

    DefaultMutableTreeNode guangdong = new DefaultMutableTreeNode("深圳");  

    DefaultMutableTreeNode foshan = new DefaultMutableTreeNode("网元1");  

    DefaultMutableTreeNode shantou = new DefaultMutableTreeNode("网元2"); 

    

    DefaultMutableTreeNode guangxi = new DefaultMutableTreeNode("上海");  

    DefaultMutableTreeNode guilin = new DefaultMutableTreeNode("网元3");  

    DefaultMutableTreeNode nanning = new DefaultMutableTreeNode("网元4");  

  

    public void init()  

    {  

        //通过add方法建立树节点之间的父子关系   

        guangdong.add(foshan);  

        guangdong.add(shantou);  

        guangxi.add(guilin);  

        guangxi.add(nanning);  

        root.add(guangdong);  

        root.add(guangxi);  

        

        changeBtn.addActionListener(new ActionListener() {



            @Override

            public void actionPerformed(ActionEvent e) {

                System.out.println("关闭网络");

            }

        });

        //以根节点创建树   

        tree = new JTree(root);  

  

        //默认连线   

        //tree.putClientProperty("JTree.lineStyle" , "Angeled");   

        //没有连线   

        tree.putClientProperty("JTree.lineStyle" , "None");  

        //水平分隔线   

        //tree.putClientProperty("JTree.lineStyle" , "Horizontal");    

  

  

        //设置是否显示根节点的“展开/折叠”图标,默认是false   

        tree.setShowsRootHandles(true);  

        //设置节点是否可见,默认是true   

        tree.setRootVisible(true);  

  

        panel.add(new JScrollPane(tree));  

        panel.add(changeBtn);

        frame.add(panel);

        frame.setSize(170, 270);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  

        frame.setVisible(true);  

    }  

  

    public static void main(String[] args)   

    {  

        new TreeDemo().init();  

    }  

}

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magic_kid_2010 2012-08-28

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JTree tree = (JTree) e.getSource();
int selRow = tree.getRowForLocation(e.getX(), e.getY());
TreePath selPath = tree.getPathForLocation(e.getX(), e.getY());
if(selRow != -1) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) selPath.getLastPathComponent();
node.setIcon(....);
}