生產者消費者問題（java）

package com.testcase;


public class TestThread {
	public static void main(String[] args) {
		Product product = new Product();
		Producer p1 = new Producer();
		p1.setProduct(product);
		
		Consumer c1 = new Consumer();
		c1.setProduct(product);
		Consumer c2 = new Consumer();
		c2.setProduct(product);
		
		Thread t1 = new Thread(p1);
		t1.setName("生產者1");
		t1.start();
		Thread t2 = new Thread(c1);
		t2.setName("消費者01");
		t2.start();
		Thread t3 = new Thread(c2);
		t3.setName("消費者02");
		t3.start();
	
	}
}


class Producer implements Runnable{
	private Product product;


	public Product getProduct() {
		return product;
	}


	public void setProduct(Product product) {
		this.product = product;
	}


	@Override
	public void run() {
		while (true) {
			try {
				product.increase();
				
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	
}


class Consumer implements Runnable{
	private Product product;


	public Product getProduct() {
		return product;
	}


	public void setProduct(Product product) {
		this.product = product;
	}


	@Override
	public void run() {
		while (true) {
			try {
				product.decrease();
				Thread.yield();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}


class Product {
	
	private int num = 0;


	public int getNum() {
		return num;
	}


	public void setNum(int num) {
		this.num = num;
	}
	
	public synchronized void increase() throws InterruptedException {
		if (num < 100) {
			Thread.sleep(200);
			this.num ++;
			System.out.println(Thread.currentThread().getName() + "生產第" + num + "個產品！");
			notifyAll();
		} else {
			wait();
		}
	}
	
	public synchronized void decrease() throws InterruptedException {
		if (num > 0) {
			Thread.sleep(500);
			System.out.println(Thread.currentThread().getName() + "消費第" + num + "個產品！");	
			this.num --;
			notifyAll();
		} else {
			wait();
		}
		
	}
}