I have two classes Parent and Child where child extends parent.

I want to have a method that accepts one parameter that is either the Parent type or Child type.

Is there any method other than using over loading?

Can i write a method that will except any objects i made with classes that extends my parent class or only except parameters that implements a specific interface?

What is the best practice for such situations?

public class Xray{

    public void imagine(HumanBase patient)
    
    { patient.diagnosis = "xray shows no abnormalities";  }

        public void imagine(HumanPatient patient)
    
    { patient.diagnosis = "xray shows no abnormalities";  }
    
        public void imagine(HumanDoctor patient)
    
    { patient.diagnosis = "xray shows no abnormalities";  }

}

In this example both HumanPatient and HumanDoctor are extends human base.

Since all are human they might need to be xrayed. I had to write multiple methods for each object type.,

But since they all extends same class and impliment similiar interfaces can there be a better way to write such system?

I tried to write a method that only accepts parameter typees that is extended from same parent. I can not find a method other than using over loading.