Question

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get type of a generic parameter in java with reflection
Java Generics Reflection: Generic field type of subclass

here’s the thing. I have this code and I need to somehow get the generic information from the object.

Class A {
   public static String getGenericType(Object o) {
      ...
   }

   public static void main(String[] args) {
      ArrayList<Integer> list = new ArrayList<Integer>();
      getGenericType(list); //this should return "Integer"
   }
}

I know you can get generic type from Field (Class.getField), but this is something different. Anybody knows how to get it done? Thanks in advance.

Have a nice day

Answer 1

Yep, type erasure means that you don’t get to know what’s inside of <> at run-time.