java 生產者消費者簡單實現demo

第一種方式 使用BlockingQueue 阻塞隊列

public class Threads {


    public static void main(String[] args) {
        final ArrayBlockingQueue<Integer> queue=new ArrayBlockingQueue<>(10);
        produce produce=new produce(queue);
        consumer consumer=new consumer(queue);
        consumer.start();
        produce.start();

    }

     static class produce extends Thread{
      final  ArrayBlockingQueue<Integer> integerArrayBlockingQueue;

         public produce(ArrayBlockingQueue<Integer> integerArrayBlockingQueue) {
             this.integerArrayBlockingQueue = integerArrayBlockingQueue;
         }

         @Override
         public void run() {
             while (true){
                 Integer random=new Random().nextInt(10);
                 integerArrayBlockingQueue.add(random);
                 System.out.println("shen chan shu ju"+random);
                 try {
                     Thread.sleep(1000);
                 } catch (InterruptedException e) {
                     e.printStackTrace();
                 }
             }
         }
     }

    static class consumer extends Thread{
      final ArrayBlockingQueue<Integer> integerArrayBlockingQueue;

        public consumer(ArrayBlockingQueue<Integer> integerArrayBlockingQueue) {
            this.integerArrayBlockingQueue = integerArrayBlockingQueue;
        }

        @Override

        public void run() {
            while (true){
                try {
                    Integer element=integerArrayBlockingQueue.take();
                    System.out.println("xiao fei shu ju "+element);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }

}
第二種方法利用 wait()和 notifyAll()

public class Threads {
    private static String lock = "lock";

    public static void main(String[] args) {
        final List<Integer> list = new ArrayList<>(10);
        final Integer max = 10;
        produce produce1 = new produce(list, max);
        produce produce2 = new produce(list, max);
        consumer consumer = new consumer(list, max);
        consumer.start();
        produce1.start();
        produce2.start();
    }

    static class produce extends Thread {
        final List<Integer> list;
        final Integer max;

        public produce(List<Integer> list, Integer max) {
            this.list = list;
            this.max = max;
        }

        @Override
        public void run() {
            while (true) {
                synchronized (lock) {
                    while (list.size() > max) {
                        try {
                            lock.wait();
                            System.out.println("生產數據已滿  線程" + Thread.currentThread().getName() + "已停止");
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    int random = new Random().nextInt(10);
                    list.add(random);
                    lock.notifyAll();
                    System.out.println("線程" + Thread.currentThread().getName() + "正在生產數據" + random);
                }
            }
        }
    }

    static class consumer extends Thread {
        final List<Integer> list;
        final Integer max;

        public consumer(List<Integer> list, Integer max) {
            this.list = list;
            this.max = max;
        }

        @Override

        public void run() {
            while (true) {
                synchronized (lock) {
                    while (list.isEmpty()) {
                        try {
                            lock.wait();
                            System.out.println("消費數據已空  線程" + Thread.currentThread().getName() + "已停止");
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    int random = list.remove(0);
                    lock.notifyAll();
                    System.out.println("線程" + Thread.currentThread().getName() + "正在消費數據" + random);
                }

            }
        }
    }

}
第三種方法 ReentrantLock await() 和 signal() 實現

public class Threads {

    private Lock lock=new ReentrantLock();
    final Condition notfull=lock.newCondition();
    final Condition notempty=lock.newCondition();
    public static void main(String[] args) {
        final List<Integer> list = new ArrayList<>(10);
        final Integer max = 10;
        Threads threads = new Threads();
        produce produce1 = threads.new produce(list, max);
        produce produce2 = threads.new produce(list, max);
        consumer consumer = threads.new consumer(list, max);
        consumer.start();
        produce1.start();
        produce2.start();
    }

     class produce extends Thread {
        final List<Integer> list;
        final Integer max;

        public produce(List<Integer> list, Integer max) {
            this.list = list;
            this.max = max;
        }

        @Override
        public void run() {
            while (true) {
                lock.lock();
                while (list.size() > max) {
                    try {
                        notfull.await();
                        System.out.println("生產數據已滿  線程" + Thread.currentThread().getName() + "已停止");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                int random = new Random().nextInt(10);
                list.add(random);
                notempty.signal();
                System.out.println("線程" + Thread.currentThread().getName() + "正在生產數據" + random);
            }
        }
    }

     class consumer extends Thread {
        final List<Integer> list;
        final Integer max;

        public consumer(List<Integer> list, Integer max) {
            this.list = list;
            this.max = max;
        }

        @Override

        public void run() {

            while (true) {
                lock.lock();
                while (list.isEmpty()) {
                    try {
                        notempty.await();
                        System.out.println("消費數據已空  線程" + Thread.currentThread().getName() + "已停止");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                int random = list.remove(0);
                notfull.signal();
                System.out.println("線程" + Thread.currentThread().getName() + "正在消費數據" + random);
            }

        }
    }

}