Question

I have the following code and this code the casting is hard-coded (Person) Since object is generic type there is a way to get it during run-time with reflection ?
I don’t have the classes type and I get it just during Runtime (can be many different class)
but all the classes have the same method setId,how I can do it ?

List<Object> listClsObj
    for (Object object : listClsObj) {
            ((Person)object).setId(null);
        }

I tried with (object.getClass().setId(null); and I got sytax error and also tried with

Class<?> clazz = object.getClass(); 
(clazz).setId(null);

and also get syntax error (maybe I didnt do it well ),how should I handle it assume that I dont know the class type?

Answer 1

You can try with the following code

Class<?> clazz = object.getClass();
                Field field = clazz.getDeclaredField("id");
                field.setAccessible(true);
                field.set(object, null);