Java generic method Cannot resolve method 'getX()' in 'T'

Say I have a couple of Objects (=classes) which each has a method getX():

public class A{
   /* some code */
   public float getX(){}
}
public class B{
   /* some code */
   public float getX(){}
}

Now I want to write a generic static method as the following:

public static <T> boolean isOverlaps(T obj) {
   if (obj == null || (!obj.getClass().isInstance(A.class) && !obj.getClass().isInstance(B.class)))
       return false;
   return obj.getX() >= 0 && /*some logic*/; // here it falls
}

IDE says:

Cannot resolve method ‘getX()’ in ‘T’

How can I resolve the method properly without casting (since it is a generic method)? Is it even possible?

>Solution :

You need an interface to let Java know that T has the desired function:

public interface I {
   float getX();
}

public class A implements I {
   /* some code */
   public float getX(){
       return 1.0f;
   }
}
public class B implements I {
   /* some code */
   public float getX(){
       return 2.0f;
   }
}

public static <T extends I> boolean isOverlaps(T obj) {
   return obj.getX() >= 0 && /*some logic*/;
}

Or, a bit simpler without the unnecessary type variable:

public static boolean isOverlaps(I obj) {
   return obj.getX() >= 0 && /*some logic*/;
}