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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