Android timer schedule vs scheduleatfixedrate

The difference is best explained by this non-Android documentation:. In fixed-rate execution, each execution is scheduled relative to the scheduled execution time of the initial execution. If an execution is delayed for any reason such as garbage collection or other background activity , two or more executions will occur in rapid succession to "catch up.

In fixed-delay execution, each execution is scheduled relative to the actual execution time of the previous execution. If an execution is delayed for any reason such as garbage collection or other background activity , subsequent executions will be delayed as well. Aside from this, there is no difference. You will not find a significance performance difference, either.


  • java.util.Timer.scheduleAtFixedRate() Method.
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If you are using this in a case where you want to stay synchronized with something else, you'll want to use scheduleAtFixedRate. The delay from schedule can drift and introduce error. This is going to perform once after the 30 Second Time Period Interval is over. A kind of timeoput-action. There is sample: In case of schedule it only executes once when the appropriate times came. On the other hand scheduleAtFixedRate has an extra parameter period which contains amount of time in milliseconds between subsequent executions.


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  • Using the Timer and TimerTask Classes;
  • Using the Timer and TimerTask Classes.

Things are a little different now. The javadoc.

How to Schedule a Task to Run in an Interval

As you can see, the period is transferred to negative value in schedule method. Let's see what's the difference when scheduling it. It's where magic happens, for schedule method, the next task execution time is based on the currentTime which is calculated right before the this task runs. That means, every task's execution time only be related with previous task starts time. By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies.

java example timertask - Android Timer schedule vs scheduleAtFixedRate

What is the difference between schedule and scheduleAtFixedRate? Ask Question. What is the difference between these 2 methods of Timer class: Fixed delay vs fixed rate. SotiriosDelimanolis Exactly. What is the difference?


  • java - Timer schedule vs scheduleAtFixedRate? - Stack Overflow.
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In fixed delay, the execution is relative to the last execution. In fixed rate, it's fixed rate.

How to Schedule a task for repeated execution, beginning after specified delay

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Public constructors

In this article, I will show you 3 different ways to achieve this They are as follows using simple thread using TimerTask using ScheduledExecutorService Using Simple Thread This is very simple, which creates the simple thread puts it run in forever with use of while loop and makes use of sleep method to put the interval between running. This is simply fast and quick way to achieve it Following is code for this. These classes are classes existed from the JDK 1. Executors; import java.

java - Android Timer schedule vs scheduleAtFixedRate - Stack Overflow

ScheduledExecutorService; import java. Like This Article? Opinions expressed by DZone contributors are their own.