java里面execute什么意思_Java线程池中submit()和execute之间的区别？

一：

submit()方法，可以提供Future < T > 类型的返回值。

executor()方法，无返回值。

execute无返回值public void execute(Runnable command) {

if (command == null)

throw new NullPointerException();//抛掉异常

int c = ctl.get();

if (workerCountOf(c) < corePoolSize) {

if (addWorker(command, true))

return;

c = ctl.get();

}

if (isRunning(c) && workQueue.offer(command)) {

int recheck = ctl.get();

if (! isRunning(recheck) && remove(command))

reject(command);

else if (workerCountOf(recheck) == 0)

addWorker(null, false);

}

else if (!addWorker(command, false))

reject(command);

}

submit有Future返回值 :/**

* @throws RejectedExecutionException {@inheritDoc}

* @throws NullPointerExcepti