package chapter14;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.event.*;
import javax.swing.event.*;
public class JTreeDemo extends JFrame
{
	JTree tree;
	DefaultMutableTreeNode group;
	DefaultMutableTreeNode friend,worker,student;
	DefaultMutableTreeNode friend1,friend2,worker1,worker2,worker3,student1,student2,student3;
	public JTreeDemo()
	{
		//根結點
		group=new DefaultMutableTreeNode("我的群組");
		//二級結點
		friend=new DefaultMutableTreeNode("我的好友");
		worker=new DefaultMutableTreeNode("我的同事");
		student=new DefaultMutableTreeNode("我的學生");
		//三級結點
		friend1=new DefaultMutableTreeNode("新朋友");
		friend2=new DefaultMutableTreeNode("老朋友");
		worker1=new DefaultMutableTreeNode("株洲職大");
		worker2=new DefaultMutableTreeNode("鐵道職院");
		worker3=new DefaultMutableTreeNode("株洲電大");
		student1=new DefaultMutableTreeNode("軟件052");
		student2=new DefaultMutableTreeNode("軟件041");
		student3=new DefaultMutableTreeNode("軟件031");
		friend.add(friend1);
		friend.add(friend2);
		worker.add(worker1);
		worker.add(worker2);
		worker.add(worker3);
		student.add(student1);
		student.add(student2);
		student.add(student3);
		group.add(friend);
		group.add(worker);
		group.add(student);
		tree=new JTree(group);//以group為參數創建根目錄
		tree.collapseRow(1);//總是顯示根目錄在前
		tree.setToggleClickCount(1);//設置鼠標單擊數
		this.getContentPane().add(tree);
		setSize(300,300);
		setVisible(true);
		setTitle("樹的應用演示");
	}
	public static void main(String args[])
	{
		new JTreeDemo();
	}
}