java实现倒计时

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：