else if (q == 4)// Lager liste over oljeselskaper.
                {
                    int radnr = 0;
                    int kolnr = 0;
                    for (int k = 0; k < felteiere.length; k++)
                        {
                            for (int i = 0; i < eier.length; i++)
                                {
                                    for (int j = 0; j < eier[0].length; j++)
                                        {
                                            if (eier[i][j] != null && eier[i][j] != felteiere[k])
                                                {
                                                    felteiere[k] = eier[i][j];

                                                }

                                        }
                                }
                        }
                    for (int k = 0; k < felteiere.length; k++)
                        {
                            for (int i =0; i < eier.length; i++)
                                {
                                    for (int j = 0; j < eier[0].length; j++)
                                        {
                                            if (felteiere[k]==eier[i][j])
                                                {
                                                    System.out.println();
                                                    System.out.println("Oljeselskapet "+felteiere[k]+" eier:");
                                                    radnr = i; kolnr = j;
                                                    System.out.println("Feltet F("+radnr+","+kolnr+")");
                                                }
                                        }
                                }
                        }