线程池

AbstractExecutorService

DelegatedExecutorService

ScheduledThreadPoolExecutor

Executors

newFixedThreadPool()newFingleThreadPool()...

工厂类，用于产生各种不同类型的线程池

FinalizableDelegatedExecutorService

ThreadPoolExecutor

ExecutorService

submit(Runnable)submit(Callable)

ScheduledExecutorService

Executor

execute(Runnable)