Question

Suppose that we have 2 classes A,B:

class A extends SomeClass {
   public String getProp() {
      return "propA";
   }
}

class B extends SomeOtherClass{
   private String propB;

   public B setProp(String value) {
      propB = value;
      return this;
   }

   public String getProp() {
      return propB;
   }
}

and suppose that we have another class called X and this class X has a method someMethod that takes a reference to any of these classes ,is there a way that we can use generics in this method to call getProp() according to the object that has been passed?

Answer 1

Well this can be considered an answer , but I don’t like it..

public class X<T>{
public void someMethod(T t) throws NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException{
    t.getClass().getMethod("getProp", null).invoke(t, null);
}
public static void main(String[] args) throws NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
    X<A> weird = new X<>();
    A a = new A();
    weird.someMethod(a);
}

}