Java倒计时三种实现方式代码实例

时间:2021-08-06 00:29:22

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:

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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:

Java倒计时三种实现方式代码实例

time2()结果:

Java倒计时三种实现方式代码实例

time3()结果:

Java倒计时三种实现方式代码实例

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原文链接:https://www.cnblogs.com/heizai002/p/6862625.html