Create beans from inner class using spring

Question

I was trying to define a class something below. Spring is not instantiating the beans.

    @Component
    public class A{
        @Component
        public class B{
         }
     }

Is there any way to let Spring create beans like above.

Answer 1

I don't think so because the inner class can not exist without its enclosing class. therefore it can only be injected into the enclosing Bean.

From Spring documentations:

An inner bean definition does not require a defined id or name; the container ignores these values. It also ignores the scope flag. Inner beans are always anonymous and they are always created with the outer bean. It is not possible to inject inner beans into collaborating beans other than into the enclosing bean.

I think it is only possible only for static inner classes and not for not-static inner classes.

This should work:

    @Component
    public class A{
        @Component
        public static class B{
         }
     }