六、阻塞队列LinkedBlockQueue

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;

public class BlockQueueDemo {

    private BlockingQueue<String> userQueue = new LinkedBlockingQueue<>();

    private void offer() {
        // 每1秒钟，offer一条数据
        for (int i = 0; i < 10; i++) {
            int id = i;
            new Thread(() -> {
                userQueue.offer("user: ID=" + id);
            }).start();
            System.out.println("offered");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    private void poll() {
        // 每1秒钟，poll一条数据
        for (int i = 0; i < 10; i++) {
            int id = i;
            new Thread(() -> {
                String user = userQueue.poll();
                System.out.println(user);
            }).start();
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        BlockQueueDemo queueDemo = new BlockQueueDemo();
        queueDemo.offer();
        queueDemo.poll();
    }
}