ArrayBlockingArray-四组API

import java.sql.Time;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.TimeUnit;

//阻塞队列
//写入：如果队列满了，必须阻塞等待
//读取：如果队列空了，必须阻塞等待生产
public class BlockingQueueDemo {
    public static void main(String[] args) throws InterruptedException {
        Test3();
    }

    //抛出异常
    public static void Test(){
        ArrayBlockingQueue queue = new ArrayBlockingQueue<>(3);
        System.out.println(queue.add("a"));
        System.out.println(queue.add("b"));
        System.out.println(queue.add("c"));
        //查看队首
        System.out.println("队首元素" + queue.element());
        //队列容量只有3，如果此时加入第4个，则会抛出Queue full异常
        //System.out.println(queue.add("d"));

        System.out.println(queue.remove());
        System.out.println(queue.remove());
        System.out.println(queue.remove());
        //队列空了，再去取，抛出NoSuchElementException异常·
        //System.out.println(queue.remove());
    }

    //不抛出异常
    public static void Test1(){
        ArrayBlockingQueue queue = new ArrayBlockingQueue(3);
        System.out.println(queue.offer("a"));
        System.out.println(queue.offer("b"));
        System.out.println(queue.offer("c"));
        //查看队首
        System.out.println("队首元素" + queue.peek());
        //队列容量只有3，如果此时加入第4个，offer方法不抛出异常了
        System.out.println(queue.offer("d"));

        System.out.println(queue.poll());
        System.out.println(queue.poll());
        System.out.println(queue.poll());
        //队列容量只有3，如果此时加入第4个，offer方法不抛出异常了
        System.out.println(queue.poll());
    }

    //阻塞等待
    public static void Test2() throws InterruptedException {
        ArrayBlockingQueue queue = new ArrayBlockingQueue(3);
        queue.put("a");
        queue.put("b");
        queue.put("c");
        //阻塞等待了
        //queue.put("d");

        queue.take();
        queue.take();
        queue.take();
    }

    //超时等待
    public static void Test3() throws InterruptedException {
        ArrayBlockingQueue queue = new ArrayBlockingQueue(3);
        System.out.println(queue.offer("a"));
        System.out.println(queue.offer("b"));
        System.out.println(queue.offer("c"));
        //超过2秒就不等了，退出
        queue.offer("d", 2, TimeUnit.SECONDS);

        System.out.println(queue.poll());
        System.out.println(queue.poll());
        System.out.println(queue.poll());
        //队列容量只有3，如果此时加入第4个，offer方法不抛出异常了
        System.out.println(queue.poll(2, TimeUnit.SECONDS));
    }
}