java.util.Timer.scheduleAtFixedRate() Method

Description

The scheduleAtFixedRate(TimerTask task,long delay,long period) method is used to schedule the specified task for repeated fixed-rate execution, beginning after the specified delay.

Declaration

Following is the declaration for java.util.Timer.scheduleAtFixedRate() method.

public void scheduleAtFixedRate(TimerTask task,long delay,long period)

Parameters

• task − This is the task to be scheduled.

• delay − This is the delay in milliseconds before task is to be executed.

• period − This is the time in milliseconds between successive task executions.

Return Value

NA

Exception

• IllegalArgumentException − This exception is thrown if time.getTime() is negative.

• IllegalStateException − This is thrown if task was already scheduled or cancelled, timer was cancelled, or timer thread terminated.

Example

The following example shows the usage of java.util.Timer.scheduleAtFixedRate()

package com.tutorialspoint;

import java.util.*;

public class TimerDemo {
   public static void main(String[] args) {
      
      // creating timer task, timer
      TimerTask tasknew = new TimerScheduleFixedRateDelay();
      Timer timer = new Timer();

      // scheduling the task at fixed rate delay
      timer.scheduleAtFixedRate(tasknew,500,1000);      
   }
   // this method performs the task

   public void run() {
      System.out.println("working at fixed rate delay");      
   }    
}

Let us compile and run the above program, this will produce the following result.

working at fixed rate delay
working at fixed rate delay
working at fixed rate delay
working at fixed rate delay and so on.....