How to Implement Precise Delays in Java Execution?

Pausing Execution in Java for Delay

In Java, executing a loop that requires time-bound execution introduces the need for delays. This guide addresses the method for incorporating delays in Java.

Using TimeUnit for Delay

Leveraging java.util.concurrent.TimeUnit, you can introduce delays as seen below:

TimeUnit.SECONDS.sleep(1); // Pauses for one second
TimeUnit.MINUTES.sleep(1); // Pauses for one minute

However, this method may lead to drift over time due to the natural execution variations in a loop.

Alternative with ScheduledExecutorService

For more precise and flexible delays, consider the ScheduledExecutorService. It allows you to schedule tasks with fixed rates or delays:

For Java 8:

final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
executorService.scheduleAtFixedRate(App::myTask, 0, 1, TimeUnit.SECONDS);

For Java 7:

final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
executorService.scheduleAtFixedRate(new Runnable() {
    @Override
    public void run() {
        myTask();
    }
}, 0, 1, TimeUnit.SECONDS);

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