Java中JTree的简单案例

package ch12;

import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;

/**
 * Created by Jiqing on 2016/12/9.
 */
public class SimpleJTree {
    // 定义属性
    JFrame jf = new JFrame("简单树");
    JTree tree;
    DefaultMutableTreeNode root;
    DefaultMutableTreeNode guangdong;
    DefaultMutableTreeNode guangxi;
    DefaultMutableTreeNode foshan;
    DefaultMutableTreeNode shantou;
    DefaultMutableTreeNode guilin;
    DefaultMutableTreeNode nanning;
    // 初始化
    public void init() {
        // 创建节点
        root = new DefaultMutableTreeNode("中国");
        guangdong = new DefaultMutableTreeNode("广东");
        guangxi = new DefaultMutableTreeNode("广西");
        foshan = new DefaultMutableTreeNode("佛山");
        shantou = new DefaultMutableTreeNode("汕头");
        guilin = new DefaultMutableTreeNode("桂林");
        nanning = new DefaultMutableTreeNode("南宁");
        // 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);
        // 以根节点创建树
        tree = new JTree(root);
        jf.add(new JScrollPane(tree));
        jf.pack();
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设置关闭,会返回Process finished with exit code 0
        jf.setVisible(true);
    }

    public static void main(String[] args) {
        new SimpleJTree().init();
    }

}