ThreadPoolExecutor的繼承者們

從ThreadPoolExecutor類的代碼可以知道，ThreadPoolExecutor 繼承了AbstractExecutorService，我們來看一下AbstractExecutorService的實現：

public abstract class AbstractExecutorService implements ExecutorService {

protected RunnableFuture newTaskFor(Runnable runnable, T value) { };

protected RunnableFuture newTaskFor(Callable callable) { };

public Future> submit(Runnable task) {};

public Future submit(Runnable task, T result) { };

public Future submit(Callable task) { };

private T doInvokeAny(Collection extends Callable> tasks,

boolean timed, long nanos)

throws InterruptedException, ExecutionException, TimeoutException {

};

public T invokeAny(Collection extends Callable> tasks)

throws InterruptedException, ExecutionException {

};

public T invokeAny(Collection extends Callable> tasks,

long timeout, TimeUnit unit)

throws InterruptedException, ExecutionException, TimeoutException {

};

public List> invokeAll(Collection extends Callable> tasks)

throws InterruptedException {

};

public List> invokeAll(Collection extends Callable> tasks,

long timeout, TimeUnit unit)

throws InterruptedException {

};

}

AbstractExecutorService是一個抽象類，它實現了ExecutorService接口。

我們接著看ExecutorService接口的實現：

public interface ExecutorService extends Executor {

void shutdown();

boolean isShutdown();

boolean isTerminated();

boolean awaitTermination(long timeout, TimeUnit unit)

throws InterruptedException;

Future submit(Callable task);

Future submit(Runnable task, T result);

Future> submit(Runnable task);

List> invokeAll(Collection extends Callable> tasks)

throws InterruptedException;

List> invokeAll(Collection extends Callable> tasks,

long timeout, TimeUnit unit)

throws InterruptedException;

T invokeAny(Collection extends Callable> tasks)

throws InterruptedException, ExecutionException;

T invokeAny(Collection extends Callable> tasks,

long timeout, TimeUnit unit)

throws InterruptedException, ExecutionException, TimeoutException;

}

而ExecutorService又是繼承了Executor接口，我們看一下Executor接口的實現：

public interface Executor {

void execute(Runnable command);

}

到這裡，大家應該明白了ThreadPoolExecutor、AbstractExecutorService、ExecutorService和Executor幾個之間的關係了。

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