多個生產者和多個消費者

1：建立數據存儲對象代碼以下

public class ValueObject {
    public static String value = "";
}

2：建立生產者代碼以下

public class Produce {
    private String lock;

    public Produce(String lock) {
        this.lock = lock;
    }

    public void setValue() {
        try {
            synchronized (this.lock) {
                while (!ValueObject.value.equals("")) {
                    System.out.println("生產者" + Thread.currentThread().getName() + "WAITING 了 ☆");
                    this.lock.wait();
                }
                System.out.println("生產者" + Thread.currentThread().getName() + "RUNNABLE了");
                String value = System.currentTimeMillis() + "_" + System.nanoTime();
                ValueObject.value = value;
                this.lock.notifyAll();
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

3：建立消費者代碼以下

public class Consumer {
    private String lock;

    public Consumer(String lock) {
        this.lock = lock;
    }

    public void getValue() {
        try {
            synchronized (this.lock) {
                while (ValueObject.value.equals("")) {
                    System.out.println("消費者" + Thread.currentThread().getName() + "WAITING 了 △");
                    this.lock.wait();
                }
                System.out.println("消費者" + Thread.currentThread().getName() + "RUNNABLE了");
                ValueObject.value = "";
                this.lock.notifyAll();
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

4：建立生產者線程代碼以下

public class ThreadProduce extends Thread {
    private Produce produce;

    public ThreadProduce(Produce produce) {
        this.produce = produce;
    }

    @Override
    public void run() {
        while (true) {
            this.produce.setValue();
        }
    }
}

5：建立消費者線程代碼以下

public class ThreadConsumer extends Thread {
    private Consumer consumer;

    public ThreadConsumer(Consumer consumer) {
        this.consumer = consumer;
    }

    @Override
    public void run() {
        while (true) {
            this.consumer.getValue();
        }
    }
}

6：建立測試類代碼以下

public class Test {
    public static void main(String[] args) throws InterruptedException {
        String lock = new String();
        Produce produce = new Produce(lock);
        Consumer consumer = new Consumer(lock);

        ThreadProduce[] threadProduce = new ThreadProduce[2];
        ThreadConsumer[] threadConsumer = new ThreadConsumer[2];

        for (int i = 0; i < 2; i++) {
            threadProduce[i] = new ThreadProduce(produce);
            threadProduce[i].setName("生產者" + (i + 1));

            threadConsumer[i] = new ThreadConsumer(consumer);
            threadConsumer[i].setName("消費者" + (i + 1));

            threadProduce[i].start();
            threadConsumer[i].start();
        }

        Thread.sleep(5000);

        Thread[] threadArray = new Thread[Thread.currentThread().getThreadGroup().activeCount()];
        Thread.currentThread().getThreadGroup().enumerate(threadArray);
        for (int i = 0; i < threadArray.length; i++) {
            System.out.println(threadArray[i].getName() + " " + threadArray[i].getState());
        }

    }
}