Constructor signature: ThreadPoolExecutor(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, handler)

• Execution Flow:
  1. If active threads < corePoolSize, create new thread.
  2. If active threads $ge$ corePoolSize, queue task in workQueue.
  3. If workQueue is full AND active threads < maximumPoolSize, create new thread.
  4. If workQueue is full AND active threads = maximumPoolSize, trigger RejectedExecutionHandler (AbortPolicy, CallerRunsPolicy).