int queueSize = 10;
BlockingQueue<Integer> queue = new ArrayBlockingQueue<>(queueSize);

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

public class ProducerConsumerExample {
    public static void main(String[] args) {
        BlockingQueue<Integer> queue = new ArrayBlockingQueue<>(5);

        Thread producer = new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    System.out.println("生產(chǎn)者生產(chǎn)了數(shù)據(jù)：" + i);
                    queue.put(i);
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });

        Thread consumer = new Thread(() -> {
            while (true) {
                try {
                    Integer data = queue.take();
                    System.out.println("消費(fèi)者消費(fèi)了數(shù)據(jù)：" + data);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });

        producer.start();
        consumer.start();
    }
}

// 用于存儲隊(duì)列元素的數(shù)組
final Object[] items;

// 隊(duì)列的容量
int count;

// 控制并發(fā)訪問的鎖
final ReentrantLock lock;

// 隊(duì)列不滿時的等待條件
private final Condition notFull;

// 隊(duì)列不為空時的等待條件
private final Condition notEmpty;

// 隊(duì)列中等待取數(shù)據(jù)的線程數(shù)
final AtomicInteger waitingConsumers = new AtomicInteger();

// 隊(duì)列中等待插入數(shù)據(jù)的線程數(shù)
final AtomicInteger waitingProducers = new AtomicInteger();

public ArrayBlockingQueue(int capacity) {
    this(capacity, false);
}

public ArrayBlockingQueue(int capacity, boolean fair) {
    if (capacity <= 0)
        throw new IllegalArgumentException();
    this.items = new Object[capacity];
    lock = new ReentrantLock(fair);
    notEmpty = lock.newCondition();
    notFull = lock.newCondition();
}

public void put(E e) throws InterruptedException {
    checkNotNull(e);
    final ReentrantLock lock = this.lock;
    lock.lockInterruptibly();
    try {
        while (count == items.length)
            notFull.await();
        enqueue(e);
    } finally {
        lock.unlock();
    }
}

public boolean offer(E e, long timeout, TimeUnit unit)
    throws InterruptedException {

    checkNotNull(e);
    long nanos = unit.toNanos(timeout);
    final ReentrantLock lock = this.lock;
    lock.lockInterruptibly();
    try {
        while (count == items.length) {
            if (nanos <= 0)
                return false;
            nanos = notFull.awaitNanos(nanos);
        }
        enqueue(e);
        return true;
    } finally {
        lock.unlock();
    }
}

private void enqueue(E x) {
    // 隊(duì)列尾部插入元素
    final Object[] items = this.items;
    items[putIndex] = x;
    if (++putIndex == items.length)
        putIndex = 0;
    count++;
    // 通知可能在等待的消費(fèi)者線程
    notEmpty.signal();
}

public E take() throws InterruptedException {
    final ReentrantLock lock = this.lock;
    lock.lockInterruptibly();
    try {
        while (count == 0)
            notEmpty.await();
        return dequeue();
    } finally {
        lock.unlock();
    }
}

public E poll(long timeout, TimeUnit unit) throws InterruptedException {
    long nanos = unit.toNanos(timeout);
    final ReentrantLock lock = this.lock;
    lock.lockInterruptibly();
    try {
        while (count == 0) {
            if (nanos <= 0)
                return null;
            nanos = notEmpty.awaitNanos(nanos);
        }
        return dequeue();
    } finally {
        lock.unlock();
    }
}

private E dequeue() {
    // 隊(duì)列頭部取出元素
    final Object[] items = this.items;
    @SuppressWarnings("unchecked")
    E x = (E) items[takeIndex];
    items[takeIndex] = null;
    if (++takeIndex == items.length)
        takeIndex = 0;
    count--;
    if (itrs != null)
        itrs.elementDequeued();
    // 通知可能在等待的生產(chǎn)者線程
    notFull.signal();
    return x;
}