Java基础|多线程 生产消费者模式、死锁

一、生产消费者

import java.util.LinkedList;
import java.util.List;

public class ProducerAndConsumer {

    private static class Goods{

        public Goods(){
            this(null);
        }

        public Goods(String name) {
            this.name = name;
        }
        private String name;

        public void setName(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }
    }

    private static class Producer implements Runnable {
        private List<Goods> list;
        private int count = 0;
        Producer(List<Goods> list) {
            this.list = list;
        }
        @Override
        public void run() {
            while (true) {
                synchronized(list) {
                    //队列中不为空，则释放锁
                    while (!list.isEmpty()) {
                        try {
                            list.wait();
                        } catch (InterruptedException e) {
                            throw new RuntimeException(e);
                        }
                    }
                    //生产产品
                    Goods goods = new Goods();
                    goods.setName("" + count);
                    count = count == 0 ?  1 : 0;
                    list.add(goods);
                    System.out.println("生产了产品:" + goods.getName());
                    list.notify();
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                }
            }
        }
    }
    private static class Consumer implements Runnable {
        private List<Goods> list;
        private Consumer(List<Goods> list) {
            this.list = list;
        }
        @Override
        public void run() {
            while (true) {
                synchronized(list) {
                    while (list.isEmpty()) {
                        try {
                            list.wait();
                        } catch (InterruptedException e) {
                            throw new RuntimeException(e);
                        }
                    }
                    Goods goods = list.remove(0);
                    System.out.println("消费了产品:" + goods.getName());
                    list.notify();
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                }
            }
        }
    }

    public static void main(String[] args) {
        List<Goods> list = new LinkedList<>();
        new Thread(new Producer(list)).start();
        new Thread(new Consumer(list)).start();
    }
}

二、死锁代码

public class DeadLock {

    private static class DeadLockRunable implements Runnable {
        private Object aLock = new Object();
        private Object bLock = new Object();
        private int count = 0;
        @Override
        public void run() {
            while (true) {
                if (count == 0) {
                    synchronized (aLock) {
                        System.out.println("获取了:aLock");
                        synchronized (bLock) {
                            System.out.println("获取了:bLock");
                        }
                    }
                } else {
                    synchronized (bLock) {
                        System.out.println("获取了:bLock");
                        synchronized (aLock) {
                            System.out.println("获取了:aLock");
                        }
                    }
                }
                count = count == 0 ? 1 : 0;
            }

        }
    }
    public static void main(String[] args) {
        DeadLockRunable deadLockRunable = new DeadLockRunable();
        new Thread(deadLockRunable).start();
        new Thread(deadLockRunable).start();
    }
}