锁绑定多个条件Condition
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锁绑定多个条件Condition
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/*
* 题目:多线程之间按顺序调用,实现A->B->C三个线程启动,要求如下:
* A打印5次,B打印10次,C打印15次
* 紧接着
* A打印5次,B打印10次,C打印15次
* 。。。。。
* 打印10轮
* */
SyncAndReentrantLockDemo.java
import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock;class ShareResource{private int number = 1;//A:1.B:2,C:3private Lock lock = new ReentrantLock();private Condition c1 = lock.newCondition();private Condition c2 = lock.newCondition();private Condition c3 = lock.newCondition();public void print5(){lock.lock();try{//1判断while(number != 1){c1.await();}//2干活for(int i=1;i<=5;i++){System.out.println(Thread.currentThread().getName()+"\t"+i);}//3通知number = 2;c2.signal();}catch (Exception e){e.printStackTrace();}finally {lock.unlock();}}public void print10(){lock.lock();try{//1判断while(number != 2){c2.await();}//2干活for(int i=1;i<=10;i++){System.out.println(Thread.currentThread().getName()+"\t"+i);}//3通知number = 3;c3.signal();}catch (Exception e){e.printStackTrace();}finally {lock.unlock();}}public void print15(){lock.lock();try{//1判断while(number != 3){c3.await();}//2干活for(int i=1;i<=15;i++){System.out.println(Thread.currentThread().getName()+"\t"+i);}//3通知number = 1;c1.signal();}catch (Exception e){e.printStackTrace();}finally {lock.unlock();}}}public class SyncAndReentrantLockDemo {public static void main(String[] args){ShareResource shareResource = new ShareResource();new Thread(()->{for(int i=1;i<=10;i++){shareResource.print5();}},"A").start();new Thread(()->{for(int i=1;i<=10;i++){shareResource.print10();}},"B").start();new Thread(()->{for(int i=1;i<=10;i++){shareResource.print15();}},"C").start();} }总结
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