Why use method local abstract inner classes

Question

One of the legal modifiers you can use with method local inner classes is abstract.

For example:

public class Outer {
    public void method(){
        a         


        

Answer 1

Is there any situation where you would actually use this?

1. Let S₁ denote all situations in which you need an abstract class.

2. Let S₂ denote all situations in which you need a local class.

3. The answer to your question can be found by examining S₁ ∩ S₂

Related questions:

• What benefit do method-local inner classes provide in Java?
• Use of Java [Interfaces / Abstract classes]

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Clarification: My point is that the two features (abstract classes and local classes) are two completely orthogonal features of the language. Understanding when each feature is useful is the key to understanding when they are both useful at the same time.