TokoBuku,java

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Scanner;

public class TokoBuku {

    public static ArrayList<String> listBuku = new ArrayList<>();
    private static Toko t = new Toko();

    public static void main(String[] args) throws IOException {
        int pil = 5;

        do {
            t.setNameToko("--Toko Buku Widyatama--");
            System.out.println("\t" + t.getNameToko());
            t.setDaftarBuku("DAFTAR BUKU");
            System.out.println("" + t.getDaftarBuku());
            t.setNameBuku1("1. Java Programming 1 Rp. 20.000");
            System.out.println("" + t.getNameBuku1());
            t.setNameBuku2("2. Java Programming 2 Rp. 22.500");
            System.out.println("" + t.getNameBuku2());
            t.setNameBuku3("3. Java Programming 3 Rp. 20.000");
            System.out.println("" + t.getNameBuku3());
            t.setNameBuku4("4. Java Programming 4 Rp. 35.000");
            System.out.println("" + t.getNameBuku4());
            t.setNameBuku5("5. Java Programming 5 Rp. 25.000");
            System.out.println("" + t.getNameBuku5());
            System.out.println("6. Cetak Invoice");
            System.out.print("\n");
            Scanner all = new Scanner(System.in);
            System.out.print("Masukan pilihan buku yang akan anda beli : ");
            pil = all.nextInt();
            switch (pil) {
                case 1:
                    buku1();
                    break;
                case 2:
                    buku2();
                    break;
                case 3:
                    buku3();
                    break;
                case 4:
                    buku4();
                    break;
                case 5:
                    buku5();
                    break;
                case 6:
                    hitungHarga();
                    break;
            }
        } while (pil != 6);
    }

    private static void buku5() {
        listBuku.add(t.nameBuku5);
        System.out.println("Buku " + t.nameBuku5 + " telah dimasukan ke dalam keranjang!");
    }

    private static void buku4() {
        listBuku.add(t.nameBuku4);
        System.out.println("Buku " + t.nameBuku4 + " telah dimasukan ke dalam keranjang!");
    }

    private static void buku3() {
        listBuku.add(t.nameBuku3);
        System.out.println("Buku " + t.nameBuku3 + " telah dimasukan ke dalam keranjang!");
    }

    private static void buku2() {
        listBuku.add(t.nameBuku2);
        System.out.println("Buku " + t.nameBuku2 + " telah dimasukan ke dalam keranjang!");
    }

    private static void buku1() {
        listBuku.add(t.nameBuku1);
        System.out.println("Buku " + t.nameBuku1 + " telah dimasukan ke dalam keranjang!");
    }

    private static void hitungHarga() {
        ArrayList<Integer> prices = new ArrayList<>();

        for (String item : listBuku) {
            int indexOfChar = item.indexOf("Rp.") + 4;
            StringBuilder temp = new StringBuilder();
            int length = item.length();
            for (int i = indexOfChar; i < item.length(); i++) {
                temp.append(item.charAt(i));
            }

            String price = temp.toString().replace(".", "");
            prices.add(Integer.parseInt(price));
        }

        try {
            cetakInvoice(prices);
        } catch (IOException e) {
            System.out.println("Gagal Mencetak Invoice");
        }
    }

    private static void cetakInvoice(ArrayList<Integer> prices) throws IOException {
        int totalHarga = 0;

        for (int harga : prices) {
            totalHarga += harga;
        }


        StringBuilder finalString = new StringBuilder("===================================\n" +
                "        Daftar Pembelian\n" +
                "===================================\n\n");

        for (String s : listBuku) {
            finalString.append(s).append("\n");
        }

        finalString.append("\n\n");


        finalString.append("Total Harga: ").append(convertCurrency(totalHarga)).append("\n");
        finalString.append("Terbilang: ").append(getTerbilang(totalHarga));
        BufferedWriter writer = new BufferedWriter(new FileWriter("invoice.txt", false));
        writer.append(finalString.toString());
        writer.close();

        System.out.println("Invoice Berhasil dicetak !");
    }

    private static String convertCurrency(int value) {
        DecimalFormat indonesianCurrency = (DecimalFormat) DecimalFormat.getCurrencyInstance();
        DecimalFormatSymbols formatRp = new DecimalFormatSymbols();
        formatRp.setCurrencySymbol("Rp. ");
        formatRp.setMonetaryDecimalSeparator(',');
        formatRp.setGroupingSeparator('.');

        indonesianCurrency.setDecimalFormatSymbols(formatRp);
        return indonesianCurrency.format(value);
    }

    private static String getTerbilang(int totalHarga) {

        String[] terbilang = {"", "satu", "dua", "tiga", "empat", "lima", "enam",
                "tujuh", "delapan", "sembilan", "sepuluh", "sebelas"};

        if (totalHarga < 12) {
            return terbilang[totalHarga];
        }

        if (totalHarga <= 19) {
            return terbilang[totalHarga % 10] + " belas ";
        }

        if (totalHarga <= 99) {
            return terbilang[totalHarga / 10] + " puluh " + terbilang[(int) totalHarga % 10];
        }

        if (totalHarga <= 199) {
            return "seratus " + getTerbilang(totalHarga % 100);
        }

        if (totalHarga <= 999) {
            return terbilang[totalHarga / 100] + " ratus " + getTerbilang(totalHarga % 100);
        }

        if (totalHarga <= 1999) {
            return "seribu " + getTerbilang(totalHarga % 1000);
        }

        if (totalHarga <= 999999) {
            return getTerbilang(totalHarga / 1000) + " ribu " + getTerbilang(totalHarga % 1000);
        }

        if (totalHarga <= 999999999) {
            return getTerbilang(totalHarga / 1000000) + " juta " + getTerbilang(totalHarga % 1000000);
        }

        return "";
    }

    public static final class Toko {

        private String nameToko;
        private String nameBuku1;
        private String nameBuku2;
        private String nameBuku3;
        private String nameBuku4;
        private String nameBuku5;
        private String daftarBuku;
        private String notaPembelian;
        private String harga;

        public String getHarga() {
            return harga;
        }

        public void setHarga(String harga) {
            this.harga = harga;
        }

        public String getNotaPembelian() {
            return notaPembelian;
        }

        public void setnotaPembelian(String notaPem) {
            this.notaPembelian = notaPembelian;
        }

        String getDaftarBuku() {
            return daftarBuku;
        }

        void setDaftarBuku(String daftarBuku) {
            this.daftarBuku = daftarBuku;
        }

        String getNameBuku1() {
            return nameBuku1;
        }

        void setNameBuku1(String nameBuku1) {
            this.nameBuku1 = nameBuku1;
        }

        String getNameBuku2() {
            return nameBuku2;
        }

        void setNameBuku2(String nameBuku2) {
            this.nameBuku2 = nameBuku2;
        }

        String getNameBuku3() {
            return nameBuku3;
        }

        void setNameBuku3(String nameBuku3) {
            this.nameBuku3 = nameBuku3;
        }

        String getNameBuku4() {
            return nameBuku4;
        }

        void setNameBuku4(String nameBuku4) {
            this.nameBuku4 = nameBuku4;
        }

        String getNameBuku5() {
            return nameBuku5;
        }

        void setNameBuku5(String nameBuku5) {
            this.nameBuku5 = nameBuku5;
        }

        String getNameToko() {
            return nameToko;
        }

        void setNameToko(String nameToko) {
            this.nameToko = nameToko;
        }
    }
}