package question;

class HasF {
    public void f() {
        System.out.println("HasF.f()");
    }
}

class Manipulators<T> {
    private T obj;
    public Manipulators(T x) {
        obj = x;
    }
    
    public void manipulation() {
        obj.f();
    }
}

public class Manipulation {
    public static void main(String[] args) {
        HasF hf = new HasF();
        Manipulators<HasF> manipul = new Manipulators<HasF>(hf);
        manipul.manipulation();
    }
}