Java线程队列的使用-LinkedBlockingQueue-向日葵屋

Java线程队列的使用-LinkedBlockingQueue

LinkedBlockingQueue是一种基于链表的阻塞队列，它的内部维护了一个数据节点链表。它可以选择指定容量，也可以不指定。如果不指定，默认容量是Integer.MAX_VALUE，也就是无界队列。它采用分离锁（ReentrantLock）来维护生产者和消费者的同步。

LinkedBlockingQueue可以用于实现无界缓冲区，例如下面的代码创建了一个默认容量的LinkedBlockingQueue，并向其中添加了10个元素。可以看到，插入操作不会被阻塞，因为队列没有容量限制。

import java.util.concurrent.LinkedBlockingQueue;
public class LinkedBlockingQueueDemo {
    public static void main(String[] args) {
        // 创建一个默认容量的链表阻塞队列
        LinkedBlockingQueue<Integer> lbq = new LinkedBlockingQueue<>();
        // 向队列中添加10个元素
        for (int i = 0; i < 10; i++) {
            try {
                System.out.println("Trying to put " + i + " into queue");
                lbq.put(i);
                System.out.println("Successfully put " + i + " into queue");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

输出结果（部分）：

Trying to put 0 into queue
Successfully put 0 into queue
Trying to put 1 into queue
Successfully put 1 into queue
Trying to put 2 into queue
Successfully put 2 into queue
Trying to put 3 into queue
Successfully put 3 into queue
Trying to put 4 into queue
Successfully put 4 into queue
Trying to put 5 into queue
Successfully put 5 into queue
// 此时队列没有满，插入操作不会被阻塞，直到达到Integer.MAX_VALUE的上限