简易生产者消费者

最新推荐文章于 2025-02-18 10:16:28 发布

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最新推荐文章于 2025-02-18 10:16:28 发布

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分类专栏： JAVA线程文章标签： java java线程

本文链接：https://blog.youkuaiyun.com/qq_29842929/article/details/53467848

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本文提供了一个使用Java实现的生产者消费者模式示例。通过synchronized关键字和wait/notifyAll方法来协调多个线程之间的资源竞争问题。该示例包括一个共享仓库类Store以及分别代表生产者和消费者的两个线程类Pro和Con。


public class ProConDemo {
	public static void main(String[] args) {
		Store s = new Store(5, 0);
		Pro producer1 = new Pro(s);
		Pro producer2 = new Pro(s);
		Con consumer1 = new Con(s);
		Con consumer2 = new Con(s);
		producer1.start();
		producer2.start();
		consumer1.start();
		consumer2.start();
	}
}

class Store {
	private final int MAX_SIZE;
	private int count;

	public Store(int size, int c) {
		MAX_SIZE = size;
		count = c;
	}

	synchronized public void add() {
		if (count >= MAX_SIZE) {
			System.out.println("仓库满了");
			try {
				wait();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		count++;
		System.out.println("put  " + count);
		notifyAll();
	}

	synchronized public void get() {
		if (count <= 0) {
			System.out.println("仓库空了");
			try {
				wait();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		System.out.println("get  " + count);
		count--;
		notifyAll();
	}
}

class Pro extends Thread {
	private Store s;

	public Pro(Store s) {
		this.s = s;
	}

	public void run() {
		while (true) {
			s.add();
			try {
				Thread.sleep(500);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
}

class Con extends Thread {
	private Store s;

	public Con(Store s) {
		this.s = s;
	}

	public void run() {
		while (true) {
			s.get();
			try {
				Thread.sleep(500);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
}