管程法

public class guancheng {
	//生产者消费者模式，主要是用来借助一个缓冲区，管程法.
	public static void main(String[] args) {
		huanchong hc =new huanchong();
		new shengchan(hc).start();
		new xiaofei(hc).start();
	}
}
class shengchan extends Thread{ 
	huanchong hc;
	public shengchan(huanchong hc) {
		this.hc =hc;
	}
	public void run() {
		for(int i=0; i<10; i++) {
			System.out.println("生产了"+i+"个馒头");
			hc.push(new mantou(i));
		}
	}
}
class xiaofei extends Thread{
	huanchong hc;
	public xiaofei(huanchong hc) {
		this.hc =hc;
	}
	public void run() {
		for(int i=0; i<100; i++) {
			System.out.println("消费了"+hc.pop().id+"个馒头");
		}
	}
}
class huanchong{
	mantou[] mt =new mantou[10];
	int count=0;
	//存取
	public synchronized void push(mantou m) {
		if(count==mt.length) {
			try {
				this.wait();
			} catch (InterruptedException e) {
			}
		}
		mt[count++]=m; 	
		//有了空间之后。通知消费者消费
		this.notifyAll();
	}
	//消费
	public synchronized mantou pop() {
		if(count==0) {
			try {
				this.wait();
			} catch (InterruptedException e) {
			}
		}
		count--; 
		mantou m=mt[count];
		//没有空间，通知生产者生产
		this.notifyAll();
		return m; 
	}
}
class mantou{
	int id;
	public mantou(int id) {
		this.id=id;
	}
}