mutilpbo-tugas11.java

package latihanpbo;
import java.util.Scanner;

public class Penjualan {
    public static void main(String[] args) {
        // inisialisasi Scanner untuk mendeksi inputan
        Scanner in = new Scanner(System.in);
        
        // membuat Menu Interface
        System.out.println("+================+================+==========+");
        System.out.println("| Kode Barang    | Nama Barang    | Harga    |");
        System.out.println("+================+================+==========+");
        System.out.println("| MR01           | Momogi         | 500      |");
        System.out.println("| MR02           | SilverQueen    | 13000    |");
        System.out.println("| MI01           | Teh Kotak      | 4500     |");
        System.out.println("+================+================+==========+");        
        
        // penginputan barang
        System.out.print("\nMasukkan Kode Barang  : ");
        String kod_brg = in.next();        
        
        // pemilihan jenis barang berdasarkan 2 huruf awal dari kode
        String jenis_brg; int iSub;
        // error catcher untuk subString()
        if (kod_brg.length() < 2) iSub = 1; else iSub = 2;
        switch (kod_brg.substring(0,iSub)) {
            case "MR": case "mr":
                jenis_brg = "Makanan Ringan";
                break;
            case "MI": case "mi":
                jenis_brg = "Minuman";
                break;
            default:
                jenis_brg = null;
        }
        
        // defenisikan kode barang        
        String nama_brg; int harga_brg;
        switch (kod_brg) {
            case "mr01": case "MR01":
                nama_brg = "Momogi";
                harga_brg = 500;
                break;
            case "mr02": case "MR02":
                nama_brg = "SilverQueen";
                harga_brg = 13000;
                break;
            case "mi01": case "MI01":
                nama_brg = "Teh Kotak";
                harga_brg = 4500;
                break;
            default:
                nama_brg = null;
                harga_brg = 0;
                break;
        }
        
        // error catcher
        if (nama_brg == null || jenis_brg == null || harga_brg == 0) {
            System.out.println("Maaf, anda salah menulis kode barang.");
        } else {
            // menu inteface untuk barang
            System.out.println("=====================================");
            System.out.println("Nama Barang           : " + nama_brg);
            System.out.println("Jenis Barang          : " + jenis_brg);
            System.out.println("Harga Barang          : Rp. " + harga_brg);
            System.out.println("=====================================");
            
            // menghitung harga barang
            System.out.print("\nMasukkan Jumlah Barang : ");
            int jmlh_brg = in.nextInt();
            int tot_hrg = jmlh_brg * harga_brg;
            System.out.println("Total Harga Bayar      : Rp. " + tot_hrg);
            
            // menghitung kembalian
            System.out.print("\nMasukkan Jumlah Bayar  : Rp. ");
            int bayar = in.nextInt();
            int kembalian = bayar - tot_hrg;
            if (kembalian < 0) {
                int kurang = kembalian * -1;
                System.out.println("Maaf, uang anda kurang Rp. " + kurang + ".");
            }
            else System.out.println("Kembalian              : Rp. " + kembalian);
        }
    }
}