Question

Is there a way to do this? Or do I have to create a class and implements IJavaElement?

Answer 1

You cannot cast any object of an arbitrary type to any other arbitrary class or interface type.

Casting (from one non-primitive type to another non-primitive type) does not do any magic automatic conversions. When you cast an object of type A to type B, what it means is that you tell the compiler “look, I have some object of type A here, and I want you to treat it as if it is a B; don’t give me a type error, because I know better”.

The type check will still be done, but at runtime instead of compile time. If, at runtime, the object turns out to not be a B, you’ll get a ClassCastException.

Assuming you’re talking about class java.lang.Class, then no, you cannot cast that to IJavaElement (wherever that comes from) because IJavaElement is not a superclass of nor an interface implemented by java.lang.Class. If you try to do the cast, you’ll get a ClassCastException when you run your program.