SynchronousQueue

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package concurrentTest;import java.util.Arrays;import java.util.List;import java.util.concurrent.BlockingQueue;import java.util.concurrent.SynchronousQueue;public class TestSynchronousQueue {    class Producer implements Runnable {        private BlockingQueue<String> queue;        List<String> objects = Arrays.asList("one", "two", "three");        public Producer(BlockingQueue<String> q) {            this.queue = q;        }        public void run() {            try {                for (String s : objects) {                    queue.put(s);// 产生数据放入队列中                    System.out.printf("put:%s%n",s);                }                queue.put("Done");// 已完成的标志            } catch (InterruptedException e) {                e.printStackTrace();            }        }    }    class Consumer implements Runnable {        private BlockingQueue<String> queue;        public Consumer(BlockingQueue<String> q) {            this.queue = q;        }        public void run() {            String obj = null;            try {                while (!((obj = queue.take()).equals("Done"))) {                    System.out.println(obj);//从队列中读取对象                    Thread.sleep(3000);     //故意sleep，证明Producer是put不进去的                }            } catch (InterruptedException e) {                e.printStackTrace();            }        }    }    public static void main(String[] args) {        BlockingQueue<String> q=new SynchronousQueue<String>();        TestSynchronousQueue t=new TestSynchronousQueue();        new Thread(t.new Producer(q)).start();        new Thread(t.new Consumer(q)).start();    }}
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