Java定时器Timer

public class TimerTest {
    //第一种方法：设定指定任务task在指定时间time后执行
    //schedule(timertask,Date time)
    public static void timer1(){
        Timer timer = new Timer();
        timer.schedule(new TimerTask(){
            public void run(){
                System.out.println("-------timer1 test -----");
            }
        }, 5000);
    }
    //第二种方法：设定指定任务task在指定延迟delay后进行固定延迟period周期的进行
    //schedule(TimerTask task, long delay, long period)
    public static void timer2(){
        Timer timer = new Timer();
        timer.schedule(new TimerTask(){
            public void run(){
                System.out.println("-------timer2 test -----");
            }
        }, 1000,5000);
    }
    //第三种方法第三种方法：设定指定任务task在指定延迟delay后进行固定频率peroid的执行。
    //scheduleAtFixedRate(TimerTask task, long delay, long period)
    public static void timer3(){
        Timer timer = new Timer();
        timer.scheduleAtFixedRate(new TimerTask(){
            public void run(){
                System.out.println("-------timer3 test -----");
            }
        }, 1000,5000);
    }
    //第四种方法：安排指定的任务task在指定的时间firstTime开始进行重复的固定速率period执行．
    // Timer.scheduleAtFixedRate(TimerTask task,Date firstTime,long period)
    public static void timer4(){
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR, 14);
        calendar.set(Calendar.MINUTE,30);
        calendar.set(Calendar.SECOND,00);
        Date time = calendar.getTime();
        Timer timer = new Timer();
        timer.scheduleAtFixedRate(new TimerTask(){
            public void run(){
                System.out.println("-------timer4 test -----");
            }
        },time,1000*60*60*24);
    }
    
    public static void main(String []args){
        timer1();
        timer4();
    }
}