java - ThreadPoolExecutor 中的核心池大小与最大池大小

Question

当我们谈论ThreadPoolExecutor时，核心池大小和最大池大小之间到底有什么区别？
可以用例子来解释吗？

Answer 1

来自this blog post :

Take this example. Starting thread pool size is 1, core pool size is5, max pool size is 10 and the queue is 100.

As requests come in,threads will be created up to 5 and then tasks will be added to thequeue until it reaches 100. When the queue is full new threads will becreated up to maxPoolSize. Once all the threads are in use and thequeue is full tasks will be rejected. As the queue reduces, so doesthe number of active threads.