阻塞队列BlockingQueue

package juc;

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

public class BlockingQueueDemo {
    public static void main(String[] args) throws InterruptedException {
        //创建阻塞队列-队列（先进先出）栈（后进先出）
        BlockingQueue<String> blockingQueue = new ArrayBlockingQueue<>(3);

        //第一组add、remove抛异常element检查
        first(blockingQueue);

        //第二组offer、poll返回值false和null，peek检查
        second(blockingQueue);

        //第三组put、take阻塞
        third(blockingQueue);

        //第四组offer、poll多参数超时-阻塞-超时长返回值false和null
        four(blockingQueue);
    }

    private static void first(BlockingQueue<String> blockingQueue){
        System.out.println(blockingQueue.add("a"));
        System.out.println(blockingQueue.add("b"));
        System.out.println(blockingQueue.add("c"));
        System.out.println(blockingQueue.element());

        //System.out.println(blockingQueue.add("w"));//IllegalStateException: Queue full
        System.out.println(blockingQueue.remove());
        System.out.println(blockingQueue.remove());
        System.out.println(blockingQueue.remove());
        //System.out.println(blockingQueue.remove());//NoSuchElementException
    }

    private static void second(BlockingQueue<String> blockingQueue){
        System.out.println(blockingQueue.offer("a"));
        System.out.println(blockingQueue.offer("b"));
        System.out.println(blockingQueue.offer("c"));
        System.out.println(blockingQueue.offer("www"));
        System.out.println(blockingQueue.peek());

        System.out.println(blockingQueue.poll());
        System.out.println(blockingQueue.poll());
        System.out.println(blockingQueue.poll());
        System.out.println(blockingQueue.poll());
    }

    private static void third(BlockingQueue<String> blockingQueue) throws InterruptedException {
        blockingQueue.put("a");
        blockingQueue.put("b");
        blockingQueue.put("c");
        //blockingQueue.put("w");

        System.out.println(blockingQueue.take());
        System.out.println(blockingQueue.take());
        System.out.println(blockingQueue.take());
        //System.out.println(blockingQueue.take());
    }

    private static void four(BlockingQueue<String> blockingQueue) throws InterruptedException {
        System.out.println(blockingQueue.offer("a"));
        System.out.println(blockingQueue.offer("b"));
        System.out.println(blockingQueue.offer("c"));
        System.out.println(blockingQueue.offer("w",3L, TimeUnit.SECONDS));

        System.out.println(blockingQueue.poll(3L, TimeUnit.SECONDS));
        System.out.println(blockingQueue.poll(3L, TimeUnit.SECONDS));
        System.out.println(blockingQueue.poll(3L, TimeUnit.SECONDS));
        System.out.println(blockingQueue.poll(3L, TimeUnit.SECONDS));
    }
}