question: public OrderedThreadPoolExecutor ( ) { this ( DEFAULT_INITIAL_THREAD_POOL_SIZE , DEFAULT_MAX_THREAD_POOL , DEFAULT_KEEP_ALIVE , TimeUnit . SECONDS , Executors . defaultThreadFactory ( ) , null ) ; }
target:  Creates a default ThreadPool, with default values : - minimum pool size is 0 - maximum pool size is 16 - keepAlive set to 30 seconds - A default ThreadFactory - All events are accepted