ConsumerProducer.java

package queue;


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

public class ConsumerProducer {
    public static final String EXIT_MSG  = "Good bye!";
    public static void main(String[] args) {
// 使用较小的队列，以更好地在输出中展示其影响
        BlockingQueue<String> queue = new ArrayBlockingQueue<>(3);
        Producer producer = new Producer(queue);
        Consumer consumer = new Consumer(queue);
        new Thread(producer).start();
        new Thread(consumer).start();
    }


    static class Producer implements Runnable {
        private BlockingQueue<String> queue;
        public Producer(BlockingQueue<String> q) {
            this.queue = q;
        }

        @Override
        public void run() {
            for (int i = 0; i < 20; i++) {
                try{
                    Thread.sleep(5L);
                    String msg = "Message" + i;
                    System.out.println("Produced new item: " + msg);
                    queue.put(msg);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            try {
                System.out.println("Time to say good bye!");
                queue.put(EXIT_MSG);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    static class Consumer implements Runnable{
        private BlockingQueue<String> queue;
        public Consumer(BlockingQueue<String> q){
            this.queue=q;
        }

        @Override
        public void run() {
            try{
                String msg;
                while(!EXIT_MSG.equalsIgnoreCase( (msg = queue.take()))){
                    System.out.println("Consumed item: " + msg);
                    Thread.sleep(10L);
                }
                System.out.println("Got exit message, bye!");
            }catch(InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}