Mastering FixedThreadPool in Java Executors Service - [ Advanced Java Multithreading Tutorial ]

Published: 01 January 1970
on channel: Jstobigdata - DS, ML & More

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FixedThreadPool is a class in the java.util.concurrent package that implements the ExecutorService interface. It is a thread pool that contains a fixed number of threads. When a task is submitted to the pool, if there is an idle thread available, the task is assigned to that thread. If all the threads are busy, the task is added to a queue, and it waits for an available thread.

Here are some key characteristics of FixedThreadPool:

It contains a fixed number of threads, specified at creation time.

If a task is submitted to the pool and there is an idle thread available, the task is assigned to that thread.

If all the threads are busy, the task is added to a queue and waits for an available thread.

Once a thread has completed a task, it is returned to the pool and can be reused for another task.

If a thread encounters an exception while running a task, it is terminated and replaced with a new thread.

The size of the thread pool remains fixed throughout the lifetime of the pool.

FixedThreadPool is suitable for situations where a fixed number of threads is required to perform a set of tasks. It is particularly useful for long-lived tasks or tasks that are CPU-bound, as it ensures that the number of threads is limited and does not grow too large.

This tutorial is created by Bikram Kundu

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