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Java多线程-生产者消费者例子-使用队列实现

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Java多线程-生产者消费者例子-使用队列实现

生产者
class Producer extends Thread {

    private Queue queue;
    private int maxSize;

    public Producer(Queue queue, int maxSize, String name) {
        super(name);
        this.queue = queue;
        this.maxSize = maxSize;
    }

    @SneakyThrows
    @Override
    public void run() {

        while (true) {
            // 同步代码段
            synchronized (queue) {
                while (queue.size() == maxSize) {
                    try {
                        System.out.println("Queue is full, " + "Producer thread waiting for " + "consumer to take something from queue");
                        // 由于条件不满足,生产阻塞
                        queue.wait();
                    } catch (Exception ex) {
                        ex.printStackTrace();
                    }
                }

                // 生产条件满足情况下,生产产品
                Random random = new Random();
                int i = random.nextInt();
                System.out.println("线程(" + Thread.currentThread().getName() + ")生产了一件产品: " + i + ";当前剩余商品" + queue.size() + "个");
                queue.add(i);
                queue.notifyAll();
                Thread.sleep(1000);
            }
        }
    }
}
 
消费者 

class Consumer extends Thread {

    private Queue queue;
    private int maxSize;

    public Consumer(Queue queue, int maxSize, String name) {
        super(name);
        this.queue = queue;
        this.maxSize = maxSize;
    }

    @SneakyThrows
    @Override
    public void run() {
        while (true) {
            synchronized (queue) {
                while (queue.isEmpty()) {
                    System.out.println("Queue is empty," + "Consumer thread is waiting" + " for producer thread to put something in queue");
                    try {
                        queue.wait();
                    } catch (Exception ex) {
                        ex.printStackTrace();
                    }
                }
                System.out.println("线程(" + Thread.currentThread().getName() + ")消费了一件商品: " + queue.remove() + ";当前剩余商品" + queue.size() + "个");
                queue.notifyAll();

                Thread.sleep(1000);
            }
        }
    }
} 
测试 
import lombok.SneakyThrows;

import java.util.linkedList;
import java.util.Queue;
import java.util.Random;

public class ProducerConsumerInJava {

    public static void main(String args[]) {

        Queue queue = new linkedList();
        Thread producer = new Producer(queue, 1, "producer");
        Thread consumer1 = new Consumer(queue, 1, "consumer1");
        Thread consumer2 = new Consumer(queue, 1, "consumer2");
        Thread consumer3 = new Consumer(queue, 1, "consumer3");
        Thread consumer4 = new Consumer(queue, 1, "consumer4");

        producer.start();
        consumer1.start();
        consumer2.start();
        consumer3.start();
        consumer4.start();
    }
} 

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