/*
 *文件名:ex_11_2_3.java
 *說  明:演示多線程并發工作
 */
// 單線程類
class NewThread implements Runnable 
{
	String name; // 線程名
	Thread t;
	// 構造方法
	NewThread(String threadname) 
	{
		name = threadname;
		t = new Thread(this, name);
		System.out.println("New thread: " + t);
		// 啟動線程
		t.start(); 
	}

	public void run() 
	{
		try 
		{
			for(int i = 5; i > 0; i--) 
			{
				System.out.println(name + ": " + i);
				Thread.sleep(1000);
			}
		} catch (InterruptedException e) 
		{
			System.out.println(name + "中斷");
		}	
		System.out.println(name + " 退出");
	}
}
//主類
class ex_11_2_3 
{
	public static void main(String args[]) 
	{
		//啟動多個線程
		new NewThread("線程1");
		new NewThread("線程2");
		new NewThread("線程3");
		try {

			Thread.sleep(10000);
		} catch (InterruptedException e) 
		{
			System.out.println("主線程中斷");
		}
		System.out.println("退出主線程");
	}
}