java生产者消费者问题

public class ProducerConsumer {

	public static void main(String[] args) {
		Buffer buffer = new Buffer(5);
		
		Producer[] pros = new Producer[5];
		Consumer[] cons = new Consumer[2];
		
		for(int i=0; i<pros.length; i++) {
			pros[i] = new Producer("生产者" + i + "号", buffer);
			new Thread(pros[i]).start();
		}
		
		for(int i=0; i<cons.length; i++) {
			cons[i] = new Consumer("消费者" + i + "号", buffer);
			new Thread(cons[i]).start();
		}
	}
		
}


class Message {
	private int id = 0;
	private static int nextId = 0;
	
	Message() {
		this.id = nextId;
		if (nextId < Integer.MAX_VALUE) {
			nextId++;
		} else {
			nextId = 0;
		}	
	}
	
	public String toString(){
		return "Message(" + this.id + ")";
	}
}

class Buffer {
	private int index = 0;
	private Message[] msgBuffer = null;
	
	Buffer(int bufferSize) {
		msgBuffer = new Message[bufferSize];
	}
	
	public synchronized void push(Message msg) {
		while(index == msgBuffer.length) {
			try {
				this.wait();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		this.notifyAll();
		msgBuffer[index] = msg;
		index++;
	}
	
	public synchronized Message pop() {
		while(index == 0) {
			try {
				this.wait();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		this.notifyAll();
		index--;
		return msgBuffer[index];
	}
	
}


class Producer implements Runnable {
	private String name = null;
	private Buffer buffer = null;
		
	Producer(String name, Buffer buffer) {
		this.name = name;
		this.buffer = buffer;
	}
	
	@Override
	public void run() {
		while(true) {
			Message msg = new Message();
			buffer.push(msg);

			System.out.println(this.name + "生产了：" + msg);
			try {
				Thread.sleep(5000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		
	}
	
}


class Consumer implements Runnable {
	private String name = null;
	private Buffer buffer = null;
	
	Consumer(String name, Buffer buffer) {
		this.name = name;
		this.buffer = buffer;
	}
	
	@Override
	public void run() {
		while(true) {
			Message msg = buffer.pop();
			System.out.println("==============================" + this.name + "消费了：" + msg);
			try {
				Thread.sleep(10000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		
	}
	
}