Java：原子操作类AtomicInteger代码示例

package com.demo.atomic;
import java.util.concurrent.atomic.AtomicInteger;
public class AtomicDemo {
    private static int count = 0;
    private static int synchronizedCount = 0;
    private static AtomicInteger atomicCount = new AtomicInteger();
    public static synchronized void addCount() {
        synchronizedCount++;
    }
    public static void main(String[] args) {
        // 创建5个线程
        Thread[] threads = new Thread[5];
        for (int i = 0; i < threads.length; i++) {
            threads[i] = new Thread(() -> {
                for (int j = 0; j < 10; j++) {
                    // 修改值
                    count++;
                    atomicCount.getAndIncrement();
                    addCount();
                    // 延时
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            });
            threads[i].start();
            System.out.println("start" + i);
        }
        // 等待所有线程执行完毕继续
        for (int i = 0; i < threads.length; i++) {
            try {
                System.out.println("join" + i);
                threads[i].join();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("count:" + count);
        System.out.println("atomicCount:" + atomicCount.get());
        System.out.println("synchronizedCount:" + synchronizedCount);
        /**
         * count:40
         * atomicCount:50
         * synchronizedCount:50
         */
    }
}