java控件之树形结构JTree

import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;

import org.eclipse.swt.widgets.Tree;

/**
 * 树状结构
 * 
 * @author 404
 */
public class jtree extends JFrame {

    public jtree() {

        //先实例化的是父节点，实例化完父节点之后，再实例化子节点
        DefaultMutableTreeNode Goodfriend = new DefaultMutableTreeNode("我的好友");
        Goodfriend.add(new DefaultMutableTreeNode("好友1"));
        Goodfriend.add(new DefaultMutableTreeNode("好友2"));
        Goodfriend.add(new DefaultMutableTreeNode("好友3"));

        DefaultMutableTreeNode Webfriend = new DefaultMutableTreeNode("我的网友");
        Webfriend.add(new DefaultMutableTreeNode("网友1"));
        Webfriend.add(new DefaultMutableTreeNode("网友2"));
        Webfriend.add(new DefaultMutableTreeNode("网友3"));
        DefaultMutableTreeNode Doub = new DefaultMutableTreeNode("逗逼");
        //用Doub这个对象add，那么逗逼就是最高级了。
        Doub.add(Goodfriend);
        Doub.add(Webfriend);
        JTree jTree = new JTree(Doub);
        this.add(jTree);
        this.setTitle("JTree控件演示");
        this.setSize(200, 300);
        this.setVisible(true);
        this.setLocationRelativeTo(null);//居中
    }
    public static void main(String[] args) {
        new jtree();
    }
}

运行结果：