多线程JUC 第2季 多线程的原子性

一 多线程原子性

1.1 基本数据类型原子

atomicInteger， atomicLong，atomicBoolean

代码

package com.ljf.thread.atomic;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;

class MyNumber
{
    AtomicInteger atomicInteger = new AtomicInteger();

    public void addPlusPlus()
    {
        atomicInteger.getAndIncrement();
    }
}
/**
 * @ClassName: AtomicDemo
 * @Description: TODO
 * @Author: admin
 * @Date: 2023/11/06 22:24:14 
 * @Version: V1.0
 **/
public class AtomicDemo {

    public static void main(String[] args) throws InterruptedException {
        MyNumber myNumber = new MyNumber();
        CountDownLatch ct=new CountDownLatch(10);
        for(int k=1;k<=10;k++){
            new Thread(new Runnable() {
                @Override
                public void run() {
                    for(int k=0;k<30;k++){
                        myNumber.addPlusPlus();
                    }
                    ct.countDown();
                }
            },String.valueOf(k)).start();
        }
        ct.await();
        System.out.println("");
        System.out.println(Thread.currentThread().getName()+"\t"+"result: "+myNumber.atomicInteger.get());
    }
}

结果：