Java简易消息队列的实现

import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;

public class MessageQueueTest {
    public static void main(String[] args) {
        MessageQueue<String> messageQueue = new MessageQueue<>(5);
        //生产者
        for (int i = 0; i < 10; i++) {
            int id = i;
            new Thread(() -> {
                messageQueue.put("content-" + id);
            }, "生产者" + id).start();
        }

        //消费者
        for (int i = 0; i < 2; i++) {
            new Thread(() -> {
                while (true) {
                    System.out.println(messageQueue.take());
                    try {
                        TimeUnit.SECONDS.sleep(1);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }

            }, "消费者" + i).start();
        }
    }
}

class MessageQueue<T> {
    private final List<T> queue = new LinkedList<>();
    private final int capacity;

    public MessageQueue(int capacity) {
        this.capacity = capacity;
    }

    public T take() {
        synchronized (queue) {
            while (queue.isEmpty()) {
                try {
                    System.out.println("队列空，消费者线程:【" + Thread.currentThread().getName() + "】等待");
                    queue.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            T message = queue.remove(0);
            queue.notifyAll();
            return message;
        }
    }

    public void put(T message) {
        synchronized (queue) {
            while (queue.size() == capacity) {
                try {
                    System.out.println("队列满，生产者线程:【" + Thread.currentThread().getName() + "】等待");
                    queue.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            queue.add(message);
            queue.notifyAll();
        }
    }
}