Java倒计时三种实现方式代码实例

写完js倒计时,突然想用java实现倒计时,写了三种实现方式

一:设置时长的倒计时;

二:设置时间戳的倒计时;

三:使用java.util.Timer类实现的时间戳倒计时

代码如下:

package timer;

import java.util.Calendar;

import java.util.Date;

import java.util.Timer;

import java.util.TimerTask;

/**

* java演示倒计时

*

*/

public class TimeTest {

public static int time = 60 * 60 * 60;

public static Calendar c;

public static long endTime;

public static Date date;

public static long startTime;

public static long midTime;

public static void main(String[] args) {

c = Calendar.getInstance();

c.set(2017, 4, 17, 0, 0, 0);// 注意月份的设置,0-11表示1-12月

// c.set(Calendar.YEAR, 2017);

// c.set(Calendar.MONTH, 4);

// c.set(Calendar.DAY_OF_MONTH, 17);

// c.set(Calendar.HOUR_OF_DAY, 0);

// c.set(Calendar.MINUTE, 0);

// c.set(Calendar.SECOND, 0);

endTime = c.getTimeInMillis();

date = new Date();

startTime = date.getTime();

midTime = (endTime - startTime) / 1000;

// time1();//方式一

time2();// 方式二

// time3();//方式三

}

/**

* 方式三: 使用java.util.Timer类进行倒计时

*/

private static void time3() {

Timer timer = new Timer();

timer.schedule(new TimerTask() {

public void run() {

midTime--;

long hh = midTime / 60 / 60 % 60;

long mm = midTime / 60 % 60;

long ss = midTime % 60;

System.out.println("还剩" + hh + "小时" + mm + "分钟" + ss + "秒");

}

}, 0, 1000);

}

/**

* 方式二: 设定时间戳,倒计时

*/

private static void time2() {

while (midTime > 0) {

midTime--;

long hh = midTime / 60 / 60 % 60;

long mm = midTime / 60 % 60;

long ss = midTime % 60;

System.out.println("还剩" + hh + "小时" + mm + "分钟" + ss + "秒");

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

/**

* 方式一: 给定时长倒计时

*/

private static void time1() {

while (time > 0) {

time--;

try {

Thread.sleep(1000);

int hh = time / 60 / 60 % 60;

int mm = time / 60 % 60;

int ss = time % 60;

System.out.println("还剩" + hh + "小时" + mm + "分钟" + ss + "秒");

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}

运行结果:

time1()结果:

time2()结果:

time3()结果:

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