倒计时

 

倒计时10秒，每隔1秒输出

package com.pt.thread;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 *  阻塞
 * sleep
 * @author tyler
 *
 */
public class Block {
	
	public static void main(String[] args) throws InterruptedException {
		// 倒计时
		Date endTime = new Date(System.currentTimeMillis() + 1000 * 10) ;	
		long end = endTime.getTime();
		while (true) {
			System.out.println(new SimpleDateFormat("mm:ss").format(endTime));
			Thread.sleep(1000); // 1000ms = 1s
			endTime = new Date(endTime.getTime() - 1000);
			
			if (end - 10000 > endTime.getTime()) {
				break;
			}
		}
	}
}

运行结果

01:04
01:03
01:02
01:01
01:00
00:59
00:58
00:57
00:56
00:55
00:54