Main Calculator

import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        try {
            System.out.println("--- Calculator ---");
            System.out.println("1. Tambah\n2. Kurang\n3. Kali\n4. Bagi");
            System.out.println("Pilih Operasi Matematika : ");
            String choice = in.nextLine();
            System.out.println("Input Bilangan Pertama : ");
            int bil1 = in.nextInt();
            System.out.println("Input Bilangan Kedua   : ");
            int bil2 = in.nextInt();
            switch (choice) {
                case "1":
                    Tambah tambah = new Tambah(bil1, bil2);
                    System.out.println("Hasilnya : " + tambah.getTotal());
                    break;
                case "2":
                    Kurang kurang = new Kurang(bil1, bil2);
                    System.out.println("Hasilnya : " + kurang.getTotal());
                    break;
                case "3":
                    Kali kali = new Kali(bil1, bil2);
                    System.out.println("Hasilnya : " + kali.getTotal());
                    break;
                case "4":
                    try {
                        Bagi bagi = new Bagi(bil1, bil2);
                        if (bil1 == 0 || bil2 == 0) {
                            throw new ArithmeticException("Divisor cannot be zero");
                        }
                        System.out.println("Hasilnya : " + bagi.getTotal());
                    } catch (ArithmeticException e) {
                        System.err.println("Divisor cannot be zero");
                    }
                    break;
            }
        } catch (InputMismatchException e) {
            System.err.println("Inputan bukan angka");
        }
        System.out.println("------------------");
    }
}