原子更新引用类型

class AtomicReferenceTest{
    public static AtomicReference<User> atomicUserReference = new AtomicReference<User>();
    public static void main(String[] args){
        User user = new User("conan",19);
        atomicUserReference.set(user);
        User updateUser = new User("smeth",20);
        atomicUserReference.compareAndSet(user, updateUser);
        System.out.println(atomicUserReference.get().getName());
        System.out.println(atomicUserReference.get().getOld());
    }
    static class User{
        private String name;
        private int old;
        public User(String name, int old){
            this.name = name;
            this.old = old;
        }
        public String getName(){
            return name;
        }
        public int getOld(){
            return old;
        }
    }
}

结果：

smeth
20