dependson.java

@Service
class BeanB {

  @Autowired
  BeanA beana ;

  @PostConstruct
  public void init(){
    System.out.println("bean b init is called a.b=" + beana.b);
  }

}

@Service
@DependsOn("beanB")
class BeanA {

  @Autowired
  BeanB b;

  @PostConstruct
  public void init(){
    System.out.println("bean a init is called b.a=" + b.beana);
  }
}

output:
bean a init is called b.a=null
bean b init is called a.b=xxx.BeanB@5c45d770

nodepends.java

@Service
class BeanB {

  @Autowired
  BeanA beana ;

  @PostConstruct
  public void init(){
    System.out.println("bean b init is called a.b=" + beana.b);
  }

}

@Service
class BeanA {

  @Autowired
  BeanB b;

  @PostConstruct
  public void init(){
    System.out.println("bean a init is called b.a=" + b.beana);
  }
}

output: 
bean b init is called a.b=null
bean a init is called b.a=xxxBeanA@727eb8cb