Java: How to check if an object is an instance of a non-static inner class, regardless of the outer object?

Question

If I have an inner class e.g.

class Outer{
    class Inner{}
}

Is there any way to check if an arbitrary Object is an instance of

Answer 1

Did you try using getEnclosingClass():

Returns the immediately enclosing class of the underlying class. If the underlying class is a top level class this method returns null.

Outer.class.equals(object.getClass().getEnclosingClass())

Getting the correct enclosing class of the object , IMHO is not so easy . Read this.

Somewhat of a hack would be :

object.getClass().getName().contains("Outer$");