public class Boks<T> {
    private T t;
 
    public void fyll(T t) {
       this.t = t;
    }
 
    public T hent() {
       return t;
    }


    public static void main(String[] args) {

        Boks<String> b = new Boks<String>();
        String tekst = "hallo!";

        b.fyll(tekst);
        System.out.println(b.hent()); //--> "hallo!"

    }
 }