Sample.java

public class Sample {
    public static void main(String[] args) {
        new Dog().speak(10); //I am 10
        new Dog().speak("kek"); //I am kek wow
    }
}


class Animal {
    void speak(Object something){
        System.out.println("I am " + something);
    }
}

class Dog extends Animal {
    void speak(String name) {
        ((Animal)this).speak(name + " wow");
        //ewentualnie to samo:
        this.speak((Object) (name + " wow"));
    }
}