Iteate over objects and access them as casted

I'm trying to iteate over a map and cast objects, then somehow reference them as already casted.

Assume Test1 and Test2 are totally different classes, but both have a method named equally get_class_specific_field()

HashMap<Class,Object> objects = new HashMap<>();

then inside Test1 and Test2 classes I do respectively:

objects.put(Test1.class,this);

objects.put(Test2.class,this);

This is a normal way of iterating:

for( Map.Entry<Class, Object> entry : objects.entrySet()){
    if(Object instanceof Test1){
        Test1 castedObj = (Test1)entry.getValue();
        castedObj.get_class_specific_field();
    }

    if(Object instanceof Test2){
        Test2 castedObj = (Test2)entry.getValue();
        castedObj.get_class_specific_field();
    }
}

Is it possible to somehow avoid if blocks, e.g.

for( Map.Entry<Class, Object> entry : objects.entrySet()){
    ???? castedObj = entry.getValue()).cast(entry.getKey());
    castedObj.get_class_specific_field(); 
}

Is there any other way of doing this?