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;


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
  }

  
  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);
  }

  
  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();
      }
    }
  }

  
  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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