static member variable in a singleton Spring bean

Code:

---

public class MySpringBean {

        private static MyDIClass myDIClass;
        // setter for myDIClass

        static{

                // myDIClass is referenced here
            }
}

---

I have a static attribute (myDIClass) in a singleton Spring bean class called MySpringBean. The reason for defining myDIClass as static so that I can reference it within the static block.

Also, note that the value of myDIClass is not bound to change e.g., toString()/equals() on it will always be the same (e.g. value as Apple) across the application, accross each and every invocation.

My question:
1. Am I running into any violation by declaring myDICass as static, considering its value will always be the same for all the invocations across the application?

I have a question too - how does that relate to the 'AOP (Aspect Oriented Programming)' (current forum name)?

P.S. static singletons are almost always a bad idea because they add coupling to the code and make it much harder to maintain it and write unit tests. However, singleton idea (one object per-application) is very good and reasonable. Spring defines a notion of bean scope, so, you can just declare your 'MyDIClass' bean as a singleton-scoped and let the container create it's single instance and inject to all another target beans.