The Thread pool

Introduction

Executor implementations use thread pools.
The thread pool is a collection of worker threads that are ready to serve.
Creating new threads and manage them uses a big amount of data.
Worker threads in the thread pool will help to reduce this overhead of creating threads.
Tasks are submitted to the pool via an internal queue called blocking queue.
If there are more tasks than active threads, these tasks will be inserted into a blocking queue until a thread becomes available.
A common type of thread pool is the fixed thread pool.

This has a specific number of running threads.
If a thread stops, this will replace with a new thread.
The main advantage of the fixed thread pool is it will limit the threads of an application.
It won't let the application exceed the limit of threads that the application handles.

June 27, 2021 Ravi Yasas

If an application has few threads, it can be used threads very easily using the above methods.
But if an application has many threads, it will be not easy to handle this.
Executors can be used to avoid this complexity.
The executor framework is a framework that can be used for creating, managing and executing threads.
This provides an asynchronous feature to Java applications.

Also provides execute() method but this accepts both Runnable and Callable objects.