Please consider:
===================
public class ClassA {
   public void someMethod(ClassB objB) {
          //...
   }
}
===================
public class ClassB {
}
===================
public class SubClassB extends ClassB {
}
===================
public class Main {

   private static class SubClassA extends ClassA {
       public void someMethod(ClassB objB) {
           if (objB instanceof SubClassB) {  //<------ see question
below
               //...
           } else {
               super.someMethod(objB);
           }
       }
   }

   private ClassA objA = new SubClassA();

   public ClassA getClassA() {
       return objA;
   }
}
====================
Question: Can I avoid the use of the "instanceof" operator, if yes how?

With thanks,
Willie