Java 1.5 introduced a Thread pool in Java in the form of an Executor framework, which allows Java programmers to decouple submission of a task to the execution of the task. If you are doing server-side programming in Java then the Thread pool is an important concept to maintain scalability, robustness, and stability of the system. For those, who are not familiar with thread pool in Java or the concept of thread pool here is a one-liner, Thread pool in Java is a pool of worker threads, which is ready to perform any task given to them, mostly in the form of implementation of Runnable or Callable interface.
