• 生产者消费者(二)


    package com.charles.algorithm;
    
    import java.util.LinkedList;
    
    public class ProducerConsumer {
    
        /**
         * @Desc: multiple sub-classes
         */
        static final int MAX_SIZE = 10;
        LinkedList<Integer> list = new LinkedList<Integer>();
    
        public static void main(String[] args) {
    
            ProducerConsumer pc = new ProducerConsumer();
            Consumer consumer = pc.new Consumer();
            Producer producer = pc.new Producer();
    
            // define 4 producers
            for (int i = 0; i < MAX_SIZE / 3 + 1; i++) {
                new Thread(producer).start();
            }
            // define 3 consumers
            for (int i = 0; i < MAX_SIZE / 3; i++) {
                new Thread(consumer).start();
            }
    
        }
    
        class Producer implements Runnable {
            @Override
            public void run() {
                while (true) {
                    produce();
                }
            }
    
            private void produce() {
                synchronized (list) {
                    while (MAX_SIZE <= list.size()) {
                        try {
                            System.out.println("Producer-" + Thread.currentThread().getName() + " Waiting...");
                            list.wait();
    
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    sleep();
                    list.add(list.size() + 1);
                    list.notifyAll();
                    System.out.println("Producer-" + Thread.currentThread().getName() + " produce:" + list.size() + " left: " + list.size());
                }
            }
    
        }
    
        class Consumer implements Runnable {
            @Override
            public void run() {
                while (true) {
                    consume();
                }
            }
    
            private void consume() {
                synchronized (list) {
                    while (0 >= list.size()) {
                        try {
                            System.out.println("Consumer-" + Thread.currentThread().getName() + " Waiting...");
                            list.wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    sleep();
                    int num = list.pollLast();
                    System.out.println("Consumer-" + Thread.currentThread().getName() + " consume: " + num + " left: " + list.size());
                    list.notifyAll();
                }
    
            }
    
        }
    
        private void sleep() {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
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  • 原文地址:https://www.cnblogs.com/itachy/p/7197425.html
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