class 精靈線程 extends Thread{
	public 精靈線程(){
		super("精靈線程");
		setDaemon(true);
	}

	public void run(){
		System.out.println("精靈線程開始運(yùn)行");
		int i = 0;
		try{
			while(true){
				i ++;
				Thread.sleep(1000);
				System.out.println("精靈線程休息了"+ i + "秒");
			}
		}catch(Exception e){
			System.out.println("Sleep被打斷，出現(xiàn)異常");
		}finally{
			System.out.println("精靈線程退出");
		}
	}
}

public class DaemonThreadDemo{
	public static void main(String arg[]) throws Exception {
		new 精靈線程 ().start();
		System.out.println("主線程休息5秒");
		new Thread(new Runnable(){
			public void run(){
				try{Thread.sleep(1000*20);}catch(Exception e){}
			}
		}).start();
		System.out.println("主線程運(yùn)行完畢");
	}
}