标签:Thread lock 打印 private 交替 num static conditionA
使用 condition 交替打印字符串 A、B、C
public class PrintTest { private volatile static int num = 1; private static ReentrantLock lock = new ReentrantLock(); private final static Condition conditionA = lock.newCondition(); private final static Condition conditionB = lock.newCondition(); private final static Condition conditionC = lock.newCondition(); public static void main(String[] args) { Thread threadA = new Thread() { @Override public void run() { try { lock.lock(); while (num != 1) { conditionA.wait(); } num = 2; System.out.println("A"); conditionB.signalAll(); } catch (InterruptedException e) { e.printStackTrace(); } finally { if (lock.isHeldByCurrentThread()) { lock.unlock(); } } } }; Thread threadB = new Thread() { @Override public void run() { try { lock.lock(); while (num != 2) { conditionA.wait(); } num = 3; System.out.println("B"); conditionC.signalAll(); } catch (InterruptedException e) { e.printStackTrace(); } finally { if (lock.isHeldByCurrentThread()) { lock.unlock(); } } } }; Thread threadC = new Thread() { @Override public void run() { try { lock.lock(); while (num != 3) { conditionA.wait(); } num = 1; System.out.println("C"); conditionA.signalAll(); } catch (InterruptedException e) { e.printStackTrace(); } finally { if (lock.isHeldByCurrentThread()) { lock.unlock(); } } } }; threadA.start(); threadB.start(); threadC.start(); } }
输出
A B C Process finished with exit code 0
标签:Thread,lock,打印,private,交替,num,static,conditionA 来源: https://www.cnblogs.com/guanbin-529/p/16104672.html
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