i-Kios Delivery

import java.util.Scanner;

public class IDelivery
{
    private enum Katalog {
        Aqua, Milo, Tango
    };

    private String namaPemesan;
    private Katalog barang;
    private int harga;
    private int jumlahBarang;
    private String alamatPengiriman;
    private String nomorHp;
    Scanner scan = new Scanner(System.in);

    public void bayarIDelivery()
    {
        System.out.println("Masukkan Nama Pemesan: ");
        namaPemesan = scan.next();
        System.out.println("Masukkan Nomor HP: ");
        namaPemesan = scan.next();
        scan.nextLine(); //remove trailing newline
        System.out.println("Masukkan Alamat Pengiriman: ");
        alamatPengiriman = scan.nextLine();
        System.out.println("");

        System.out.println("Pilih Barang");
        System.out.println("1. Aqua 1500ml (6000)");
        System.out.println("3. Milo (7000)");
        System.out.println("2. Tango (9000)");

        int input = scan.nextInt();
        barang = kodeToKatalog(input);
        harga = kodeToHarga(input);

        System.out.println("Masukkan Jumlah Barang");
        jumlahBarang = scan.nextInt();

        hitungHarga();
        printNota();
    }

    public void hitungHarga()
    {
        harga = harga * jumlahBarang;
    }

    public void printNota()
    {
        System.out.println("######################################");
        System.out.println("# I-Kios");
        System.out.println("# IDelivery");
        System.out.println("# Nama Pemesan: " + namaPemesan);
        System.out.println("# Nomor HP: " + nomorHp);
        System.out.println("# Alamat: " + alamatPengiriman);
        System.out.println("# Nama Barang: " + katalogToString(barang));
        System.out.println("# Jumlah Barang: " + jumlahBarang);
        System.out.println("# Harga: " + harga);
        System.out.println("######################################");
    }

    private Katalog kodeToKatalog(int kode) {
        switch (kode) {
            case 1:
                return Katalog.Aqua;
            case 2:
                return Katalog.Milo;
            case 3:
                return Katalog.Tango;
            default:
                return null;
        }
    }

    private int kodeToHarga(int kode) {
        switch (kode) {
            case 1:
                return 6000;
            case 2:
                return 7000;
            case 3:
                return 9000;
            default:
                return 0;
        }
    }

    private String katalogToString(Katalog katalog) {
        switch (katalog) {
            case Aqua:
                return "Aqua";
            case Milo:
                return "Milo";
            case Tango:
                return "Tango";
            default:
                return null;
        }
    }
}