volatile-无原子性案例详解

清疚 2024-02-19 08:31 52阅读 0赞

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package com.nanjing.gulimall.zhouyimo.controller;
    
    import java.util.concurrent.TimeUnit;
    
    /**
     * @author zhou
     * @version 1.0
     * @date 2023/11/5 7:56 下午
     */
    class MyNumber{
        int number;
        public synchronized void add(){
            number++;
        }
    }
    public class VolatileNoAtomicDemo {
        public static void main(String[] args) {
            MyNumber myNumber = new MyNumber();
            //10个线程，每个线程操作1000次
            for (int i = 0; i < 10; i++) {
                new Thread(()->{
                    for (int j = 0; j < 1000; j++) {
                        myNumber.add();
                    }
                },String.valueOf(i)).start();
            }
    
            try {
                TimeUnit.SECONDS.sleep(2);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
    
            System.out.println(myNumber.number);
        }
    }
    
    
    //10000

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[8848ac34e07445f8ade2be7c645e0bdf.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/19/b931920ea6a3412f846edcd9aade0f52.png
[a1460f6e41604a1dac9a8c1e8ae7805e.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/19/7f91fffe9a2e4ee8b7ac8f90f75b0f94.png
[42c1c2d8c18c47f9ac21b533d2a7d89b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/19/e8b6911a8ce3443291727e4a1685867b.png
[7ced335c4bca484c89cf2f96de675ce9.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/19/30b014f099934b7bb51ac1b38707d8ad.png
[f50f9e56a7f1499ab6b299f968358c66.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/19/ef3d180ef34f4ae687a8c3d132d053a4.png
[e10df52afaba44a0b54007ac0c0f8f70.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/19/048a2d3a586242df88589a3b848b5650.png