Doctoryang — Tue, 06 Sep 2016 09:02:00 GMT

JDK5�U�程�q�发�?/span>

1�Q�AtomicInteger

使用原子方式更新int�?/span>

2�Q�创建线�E�池

a)创徏固定大小的线�E�池

ExecutorService threadPool = Executors.newFixedThreadPool(10);//创徏一个有10个线�E�的�U�程�?/span>

b)创徏�~�存�U�程�?/span>

Executors.newCachedThreadPool();

创徏一个可�Ҏ��需要创建新�U�程的线�E�池,可自动调整线�E�的多少

c)创徏单线�E�的�U�程�?/span>

Executors.newSingleThreadExecutor();

该线�E�池里面只有一个线�E�，如果��L��了也可以自动再创��Z��?保证永远有一�?/span>

d)创徏一个线�E�池,它可安排在给定�g�q�后�q�行命��o或者定期地执行

ScheduledExecutorService threadPool = Executors.newScheduledThreadPool(3);

threadPool.schedule(Runnable command,long delay,TimeUnit unit)

创徏�q�执行在�l�定延迟后启用的一�ơ性操�?/span>

threadPool.scheduleAtFixedRate(Runnable command,long initialDelay,long period,TimeUnit unit)

创徏�q�执行一个在�l�定初始延迟后首�ơ启用的定期操作,后箋操作��h��l�定的周�?

也就是将在initialDelay后开始执�?然后在initialDelay+period后执�?接着在initialDelay + 2 * period后执�?依此�c�L��

不管哪种创徏方式其实都是由ThreadPoolExecutor�c�L��实现�?/span>

3�Q�Callable&Future

a)Future取得的结果类型和Callable�q�回的结果类型必��M��_��q�是通过泛型来实现的�?/span>

b)Callable要采用ExecutorSevice的submit�Ҏ��提交�Q�返回的future对象可以取消��d��?/span>

c)CompletionService用于提交一�l�Callable��d��Q�其take�Ҏ��q�回已完成的一个Callable��d��对应的Future对象�?/span>

4�Q�Lock&Condition

Lock ---> synchronized

Lock lock = new ReentrantLock();

ReadWriteLock rwlock = new ReentrantReadWriteLock();

private Condition condition = lock.newCondition();

condition.await(); ---> wait()

condition.signal(); ---> notify()

5�Q�Semaphore

final Semaphore semaphore = new Semaphore(3);

6�Q�CyclicBarrier

7�Q�CountDownLatch

8�Q�Exchanger

9�Q�ArrayBlockingQueue�Q�阻塞队列）

10�Q�ConcurrentHashMap

CopyOnWriteArrayList

CopyOnWriteArraySet

久久精视频免费在线久久完整在线看,91成人精品,日本伊人久久

JSR303