一、说明

• 1.利用字段更新器可以针对对象的域（Field）
• 2.只能配合volatile修饰的字段使用，否则会出异常Exception in thread “main” java.lang.IllegalArgumentException: Must be volatile type
• 3.常见有AtomicReferenceFieldUpdate、AtomicIntegerFieldUpdate、AtomicLongFieldUpdate

二、代码示例

package com.learning.atomic;

import lombok.Data;

import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;

/**
 * @Author wangyouhui
 * @Description 原子字段更新
 **/
public class AtomicFieldUpdate {
    public static void main(String[] args) {
        Student student = new Student();
        AtomicReferenceFieldUpdater<Student, String> updater = AtomicReferenceFieldUpdater.newUpdater(Student.class, String.class, "name");
        updater.compareAndSet(student, null, "张三");
        System.out.println(student.getName());
    }
}

@Data
class Student{
    volatile String name;
}