Impossible to make a cached thread pool with a size limit?

Question

It seems to be impossible to make a cached thread pool with a limit to the number of threads that it can create.

Here is how static Executors.newCachedThreadPool is

Answer 1

Unless I've missed something, the solution to the original question is simple. The following code implements the desired behavior as described by the original poster. It will spawn up to 5 threads to work on an unbounded queue and idle threads will terminate after 60 seconds.

tp = new ThreadPoolExecutor(5, 5, 60, TimeUnit.SECONDS,
                    new LinkedBlockingQueue());
tp.allowCoreThreadTimeOut(true);