public class ThreadGroupDemo extends Thread{
	public static void 創(chuàng)建線程組(){
		ThreadGroup group = new ThreadGroup("函數(shù)創(chuàng)建的線程組");
		System.out.println("函數(shù)中創(chuàng)建的線程組的父線程組:"+ 
			group.getParent().getName());
	}

	public static void 創(chuàng)建線程(){
		Runnable r = new Runnable(){
			public void run(){
				try{
				創(chuàng)建線程組();
				Thread.sleep(1000*10);
				}catch(Exception e){}
				System.out.println("線程"+ Thread.currentThread().getName() + "屬于 " +
				Thread.currentThread().getThreadGroup().getName() + " 執(zhí)行完畢");
			}
		};
		Thread t = new Thread(r);
		t.start();
	}

	public static void main(String arg[]) throws Exception{
		ThreadGroup group = Thread.currentThread().getThreadGroup();
		System.out.println("當(dāng)前線程組:"+ group.getName());
		ThreadGroup group1 = new ThreadGroup("我的線程組");
		Runnable r = new Runnable(){
			public void run(){
				try{
				創(chuàng)建線程();
				Thread.sleep(1000*10);
				}catch(Exception e){}
				System.out.println("線程"+ Thread.currentThread().getName() + "屬于 " +
				Thread.currentThread().getThreadGroup().getName() + " 執(zhí)行完畢");
			}
		};

		Thread 線程1 = new Thread(r,"線程1");
		Thread 線程2 = new Thread(group1,r,"線程2");
		線程1.start();
		線程2.start();
		Thread.sleep(1000*1);
		System.out.println("num:"+group.activeCount());
		Thread 線程組[] = new Thread[group.activeCount()];
		int threadNum = group.enumerate(線程組);
		System.out.println("\n當(dāng)前線程組:"+ group.getName() + "下有以下線程\n");
		for(int i=0; i< threadNum; i++)
			System.out.println(線程組[i].getName());
	}
}