线程间定制化通信

方案：给每个线程定义一个标志位。

package JUC.lock;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

//第一步 创建资源类，定义属性和操作方法
class ShareResource {
    //定义标志位
    private int flag = 1;// 1 AA 2 BB 3 CC

    //创建Lock锁
    final Lock lock = new ReentrantLock();

    //创建三个condition
    final Condition c1  = lock.newCondition();
    final Condition c2  = lock.newCondition();
    final Condition c3  = lock.newCondition();

    //打印5次，参数第几轮
    public void print5(int loop) throws InterruptedException {
        //上锁
        lock.lock();
        try{
            //判断
            while(flag != 1){
                c1.await();
            }
            //干活
            for (int i = 1; i <= 5; i++) {
                System.out.println(Thread.currentThread().getName()+" :: "+i+" :轮数: "+loop);
            }
            //修改标志位
            flag = 2;
            //通知
            c2.signalAll();
        } finally {
            //解锁
            lock.unlock();
        }
    }

    //打印10次，参数第几轮
    public void print10(int loop) throws InterruptedException {
        //上锁
        lock.lock();
        try{
            //判断
            while(flag != 2){
                c2.await();
            }
            //干活
            for (int i = 1; i <= 10; i++) {
                System.out.println(Thread.currentThread().getName()+" :: "+i+" :轮数: "+loop);
            }
            //修改标志位
            flag = 3;
            //通知
            c3.signalAll();
        } finally {
            //解锁
            lock.unlock();
        }
    }

    //打印15次，参数第几轮
    public void print15(int loop) throws InterruptedException {
        //上锁
        lock.lock();
        try{
            //判断
            while(flag != 3){
                c3.await();
            }
            //干活
            for (int i = 1; i <= 15; i++) {
                System.out.println(Thread.currentThread().getName()+" :: "+i+" :轮数: "+loop);
            }
            //修改标志位
            flag = 1;
            //通知
            c1.signalAll();
        } finally {
            //解锁
            lock.unlock();
        }
    }
}

public class ThreadDemo3 {

    public static void main(String[] args) {
        ShareResource shareResource = new ShareResource();
        new Thread(() -> {
            for (int i = 1; i <= 10; i++) {
                try {
                    shareResource.print5(i);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"AA").start();

        new Thread(() -> {
            for (int i = 1; i <= 10; i++) {
                try {
                    shareResource.print10(i);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"BB").start();

        new Thread(() -> {
            for (int i = 1; i <= 10; i++) {
                try {
                    shareResource.print15(i);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"CC").start();

    }

}

标签：int,lock,通信,locks,线程,newCondition,定制,final,Condition
来源： https://www.cnblogs.com/RobertYu666/p/16217778.html