线程十一——模拟当前系统时间倒计时
注意: 这里用到SimpleDateFormat类对时间进行格式化
package com.yyf.ThreadSleep;import java.text.SimpleDateFormat;import java.util.Date;// 模拟倒计时public class TestSleep3{ public static void main(String[] args) { // 模拟打印系统当前时间 Date startTime = new Date (System.currentTimeMillis ()); do { try { Thread.sleep (1000); System.out.println (new SimpleDateFormat ("HH:mm:ss").format (startTime)); startTime = new Date (System.currentTimeMillis ()); } catch (InterruptedException e) { e.printStackTrace (); } } while (true); }}
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