Executors
提供了工厂方法:
Factory and utility methods for Executor
, ExecutorService
, ScheduledExecutorService
, ThreadFactory
, and Callable
classes defined in this package. This class supports the following kinds of methods:
- Methods that create and return an
ExecutorService
set up with commonly useful configuration settings. - Methods that create and return a
ScheduledExecutorService
set up with commonly useful configuration settings. - Methods that create and return a "wrapped" ExecutorService, that disables reconfiguration by making implementation-specific methods inaccessible.
- Methods that create and return a
ThreadFactory
that sets newly created threads to a known state. - Methods that create and return a
Callable
out of other closure-like forms, so they can be used in execution methods requiringCallable。
1、ExecutorService (为ThreadPoolExecutor设置了一些通用的参数来生成一些线程池,使用的BlockingQueue都是inbound的queue)
1、ScheduledThreadPool
2、singledThreadPool(线程的顺序执行,使用该线程池,可以保证线程的顺序性,不会竞争资源)
3、cachedThreadPool(默认是线程处于idle 6s就自动回收,适合大量而且小的异步任务)
4、FixedThreadPool