It is an exciting topic of Java-related to  multithreading that is to perform multiple tasks at the same time. Database and web servers like Server Programs execute requests from various clients every day and the approach through which we can build new threads whenever a request arrives. But things have a drawback, and its disadvantage is that at every request our server spends too much time and resources also used and as there are too many threads that are actively running this will directly result in memory out of reach. So to overcome this problem, we have to limit the number of threads that are actively running.

Thread Pools In Java

Thread pools in Java reuse previously created threads to execute current tasks and offer a solution to the problem of thread cycle overhead and resource thrashing.

See the following figure.

Now the question in your mind is what thread pools are?

Thread pools are the ones who use the previous threads to perform current tasks through this we can solve our problem of resource thrashing and memory wasting.

It also saves the time of thread creation and hence in this way the response is very nice

Threads are mapped to system-level- threads in Java which are directly refer to operating system resources.

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