Daemon threads

"Daemon thread"是为提供普通服务在后台运行，跟寄主程序同样生命的，却不属于寄主程序的一个线程。寄主程序（non-daemon thread）一但终止，整个程序也就结束了，即使"Daemon thread"还没有运行到结尾.也就是说non-daemon thread终止，daemon thread也终止。
下面例子是引用自tij4的:

引用

package org.iteye.bbjava.concurrency.daemon;

import java.util.concurrent.TimeUnit;

public class SimpleDaemons implements Runnable {

	@Override
	public void run() {
		try {
			while (true) {
				TimeUnit.MICROSECONDS.sleep(100);
				System.out.println(Thread.currentThread() + " " + this);
			}
		} catch (InterruptedException e) {
			System.out.println("sleep interrupted!");
		}
	}

	public static void main(String[] args) throws InterruptedException {
		for (int i = 0; i < 10; i++) {
			Thread daemon = new Thread(new SimpleDaemons());
			daemon.setDaemon(true);
			daemon.start();
		}
		System.out.println("All daemon started!");
		TimeUnit.MILLISECONDS.sleep(175);
	}

}