学步园

package thread.lock;

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

/*
 * 生产消费问题
 */
class Resource{
	private String name;
	private int count = 1;
	private boolean flag = false;
	//一个锁
	Lock lock = new ReentrantLock();
	//获取两组监视器
	Condition pro_lock = lock.newCondition();	
	Condition con_lock = lock.newCondition();	
	
	public void set(String name){
		lock.lock();
		try {
			while (flag)
				try {
					pro_lock.await();
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			this.name = name + count;
			System.out.println(Thread.currentThread().getName()+".pro."+this.name);
			count++;
			flag = true;
			con_lock.signal();
		} finally {
			lock.unlock();
		}
		
	}
	public void out(){
		lock.lock();
		try{
			while(!flag)
				try {
					con_lock.await();
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			System.out.println(Thread.currentThread().getName()+"...con..."+this.name);
			flag = false;
			pro_lock.signal();
			
		} finally {
			lock.unlock();
		}
	}
}

class Producer implements Runnable{
	private Resource r;
	public Producer(Resource r) {
		this.r = r;
	}
	@Override
	public void run() {
		while(true)
			r.set("chicken");
	}
}

class Consumer implements Runnable{
	private Resource r;
	public Consumer(Resource r) {
		this.r = r;
	}
	@Override
	public void run() {
		while(true)
			r.out();
	}
}

public class ProducerConsumerDemo {

	public static void main(String[] args) {
		Resource r = new Resource();
		Producer p = new Producer(r);
		Consumer c = new Consumer(r);
		
		Thread t0 = new Thread(p);
		Thread t1 = new Thread(p);
		Thread t2 = new Thread(c);
		Thread t3 = new Thread(c);
		
		t0.start();
		t1.start();
		t2.start();
		t3.start();
	}

}