线程同步控制
Posted 水田如雅
tags:
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CyclicBarrier
int iMax = 100;
CyclicBarrier barrier = new CyclicBarrier(iMax);
int shareValue = 0;
Lock lock = new ReentrantLock();
@Test
public void test() throws Exception
for (int i = 0; i < iMax; i++)
SomeProcessValue t = new SomeProcessValue();
t.start();
barrier.await();
System.out.println(shareValue);
public class SomeProcessValue extends Thread
@Override
public void run()
try
Thread.sleep(new Random().nextInt(10));
lock.lock();
shareValue++;
lock.unlock();
barrier.await();
catch (Exception e)
e.printStackTrace();
Semaphore & CountDownLatch
int value = 0;
@Test
public void test4() throws InterruptedException
ExecutorService executorService = Executors.newFixedThreadPool(10);
CountDownLatch counter = new CountDownLatch(10);
Semaphore semaphore = new Semaphore(1); //信号量控制只有一个线程
for (int i = 0; i < 10; i++)
executorService.submit(() ->
try
semaphore.acquire();
Thread.sleep(1000);
catch (InterruptedException e)
e.printStackTrace();
counter.countDown();
value++;
System.out.println(value);
semaphore.release();
);
counter.await();
Exchanger
@Test
public void test1()
Exchanger<String> exchanger = new Exchanger<>();
ExecutorService executorService = Executors.newFixedThreadPool(2);
executorService.execute(() ->
try
System.out.println(exchanger.exchange("t1888888"));
;
catch (Exception e)
e.printStackTrace();
);
executorService.execute(() ->
try
System.out.println("t2---" + exchanger.exchange("t2"));
catch (Exception e)
e.printStackTrace();
);
executorService.shutdown();
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