treejm.java

tree程序

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class TreeJm
{
	public TreeJm()
	{
	 JFrame f=new JFrame("TreeJm");
	 Container contentPane=f.getContentPane();
	 String[]s1={"本地磁盘(c:)","本地磁盘(d:)","本地磁盘(e:)"};
	 String[]s2={"个人信件","公司信件","私人信件"};
	 String[]s3={"百度","雅虎","新浪","工大"};
	 Hashtable hashtable1=new Hashtable();
	 Hashtable hashtable2=new Hashtable();
	 hashtable1.put("我的电脑",s1);
	 hashtable1.put("我的公文包",s2);
	 hashtable1.put("收藏夹",hashtable2);
	 hashtable2.put("网站列表",s3);
	 JTree tree=new JTree(hashtable1);
	 JScrollPane scrollPane=new JScrollPane();
	 scrollPane.setViewportView(tree);
	 contentPane.add(scrollPane);
	 f.pack();
	 f.setVisible(true);
	 f.addWindowListener(new WindowAdapter()
	 {
	 	public void windowClosing(WindowEvent e)
	 	{
	 		System.exit(0);
	 		}
	 		});
	 		
	 }
	 public static void main(String args[])
	 {
	 	new TreeJm();
	 }
	}