Implement a final class without the “final” keyword

Question

A friend of mine was asked that question in his on-phone job interview a couple of days a go. I don\'t have a clue. can anyone suggest a solution? (His job interview is ov

Answer 1

public class Immutable {       
    private int val;

    public Immutable(int v)
    { 
        this.val = v;
    }

    public int getVal() { return this.val; }
}