相关疑难解决方法(0)

我正在尝试一些代码来实现计划任务,并提出了这些代码.

import java.util.*;

class Task extends TimerTask {


    int count = 1;

    // run is a abstract method that defines task performed at scheduled time.
    public void run() {
        System.out.println(count+" : Mahendra Singh");
        count++;
    }
}

class TaskScheduling {

   public static void main(String[] args) {
       Timer timer = new Timer();


       // Schedule to run after every 3 second(3000 millisecond)
       timer.schedule( new Task(), 3000);   
   }
}

我的输出:

1  :  Mahendra Singh

我期望编译器以3秒的周期间隔打印一系列Mahendra Singh,但是尽管等了大约15分钟,我只得到一个输出......我该如何解决这个问题？

我需要暂停一个while循环一段特定的毫秒数.我尝试过使用Thread.sleep(持续时间),但它不准确,特别是在循环方案中.毫秒精度在我的程序中很重要.

这是算法,我不想回去检查条件,直到expectedElapsedTime过去.

while (condition) {
    time = System.currentTimeMillis();
    //do something
    if (elapsedTime(time) < expectedElapsedTime) ) {
        pause the loop  // NEED SUBSTITUTE FOR Thread.sleep()
    }
    // Alternative that I have tried but not giving good results is 
    while ((elapsedTime(time) < expectedElapsedTime)) {
        //do nothing
    }
}

long elapsedTime(long time) {
   long diff = System.currentTimeMillis() - time;
   return diff;
}