ReentrantLock测试
博客:https://www.jianshu.com/p/7058c21e615e
public static void main(String[] args) { test3(); } public static void test1() { Runnable runnable = () -> { for (int i = 0; i < 3; i++) { System.out.println(Thread.currentThread().getName() + "输出了 " ); } }; new Thread(runnable, "a").start(); new Thread(runnable, "b").start(); } public static void test2() { ReentrantLock lock = new ReentrantLock(); Runnable runnable = () -> { try { lock.lock(); for (int i = 0; i < 3; i++) { System.out.println(Thread.currentThread().getName() + "输出了: " + i); } } catch (Exception e) { throw new RuntimeException(e); } finally { lock.unlock(); } }; new Thread(runnable, "a").start(); new Thread(runnable, "b").start(); } public static void test3() { AtomicInteger nextThread = new AtomicInteger(1); ReentrantLock lock = new ReentrantLock(); Condition conditionA = lock.newCondition(); Condition conditionB = lock.newCondition(); Runnable runnableA = () -> { for(; ; ) { try { lock.lock(); while (nextThread.get() != 1) { conditionA.await(); } System.out.println(Thread.currentThread().getName() + " 输出了A "); nextThread.set(2); conditionB.signalAll(); } catch (Exception e) { throw new RuntimeException(e); } finally { lock.unlock(); } } }; Runnable runnableB = () -> { for(; ; ){ try { lock.lock(); while (nextThread.get() != 2) { conditionB.await(); } System.out.println(Thread.currentThread().getName() + " 输出了B "); nextThread.set(1); conditionA.signalAll(); } catch (Exception e) { throw new RuntimeException(e); } finally { lock.unlock(); } } }; new Thread(runnableA, "a").start(); new Thread(runnableB, "b").start(); }
分类:
Thread
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