static class JIndividu { }
static class JIndividuList { }

%static class Jzombie extends JIndividu {
%  public Jzombie() {}
%  public boolean equals(Object o) {
%    if(o instanceof Jzombie) {
%      return true;
%    }
%    return false;
%  }
%}

static class Jpersonne extends JIndividu {
  public JIndividu n;
  public Jpersonne() { }
  public Jpersonne(JIndividu n) { this.n = n; }
  public boolean equals(Object o) {
    if(o instanceof Jpersonne) {
      Jpersonne obj = (Jpersonne) o;
      return n.equals(obj.n);
    }
    return false;
  }
}