多线程(十) 线程通信

public class Test {

	private static Object obj = new Object();

    private static final Queue<String> messageQueue = new LinkedBlockingDeque<>();

	public static void main(String[] args) throws Exception {
	
		Thread producerThread = new Thread(new Runnable() {
            @Override
            public void run() {

                for (int i = 1; i <= 9; i++) {

                    // 生产消息
                    synchronized (obj) {
                        messageQueue.add("第" + i + "条消息");
                        obj.notify();
                    }      

                    // 每生产三条暂停1秒
                    if (i > 1 && i % 3 == 0) {
                        try {
                            System.out.println("暂停");
                            Thread.currentThread().sleep(1000L);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    // ...

                }
            }
            // ...
        });

        Thread consumerThread = new Thread(new Runnable() {
            @Override
            public void run() {

                synchronized (obj) {
                    try {
                        while (true) {

                            if (messageQueue.isEmpty()) {
                                obj.wait();
                            }

                            String message = messageQueue.poll();
                            System.out.println("消费者:" + message);
                        }
                    } catch (InterruptedException e) {
                        // ...
                    }
                }
            }

            // ...
        });

        producerThread.start();
        consumerThread.start();
    }
}