java之定时器

太过爱你忘了你带给我的痛 2023-10-11 12:32 39阅读 0赞

### 文章目录 ###

*  time定时器

# time定时器 #

package com.oceanstar;
    
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.Timer;
    import java.util.TimerTask;
    
    public class TimerUtil {
        
        public static void main(String[] args) {
        
          //  time1();
            time2();
          //  time3();
        }
    
        /*
        * 设定2000ms后执行
        * */
        public static void time1(){
        
           Timer nTimer = new Timer();
           nTimer.schedule(new TimerTask() {
        
               @Override
               public void run() {
        
                   System.out.println("time1:" + "指定运行任务");
               }
           }, 2 * 1000);
        }
    
    
    
        /*
         *  延迟0毫秒，每2000毫秒执行一次
         * */
        public static void time2(){
        
            Timer nTimer = new Timer();
            nTimer.schedule(new TimerTask() {
        
                @Override
                public void run() {
        
                    Date date = new Date();
                    SimpleDateFormat dateFormat= new SimpleDateFormat("yyyy-MM-dd :hh:mm:ss");
                    System.out.println("time2:" + "延迟0毫秒，每2000毫秒执行一次" + dateFormat.format(date));
                }
            }, 0, 2 * 1000);
        }
    
    
        /**
         * 设置16：25执行任务
         * java.util.Timer.scheduleAtFixedRate(TimerTask task, Date firstTime, long period)
         */
        public static void time3(){
        
            Calendar calendar = Calendar.getInstance();
            calendar.set(Calendar.HOUR_OF_DAY, 16);
            calendar.set(Calendar.MINUTE, 25);
            calendar.set(Calendar.SECOND, 0);
    
    
            Date time = calendar.getTime();
    
            Timer timer = new Timer();
            timer.scheduleAtFixedRate(new TimerTask() {
        
                @Override
                public void run() {
        
                    System.out.printf("设置指定任务");
                }
            }, time, 1000 * 60 * 60 * 24);// 这里设定将延时每天固定执行
        }
    
    
    }

参考：https://blog.csdn.net/zbx931197485/article/details/78721847