ExceptionHandling.java

/**
 * Contoh exception handling pada program pembagian.
 *
 * @author David Ralphwaldo Martuaraja
 * @version 28 Desember 2020
 */

import java.util.Scanner;
import java.util.InputMismatchException;

public class ExceptionHandling
{
    public static void main(String[] args)
    {
        Scanner scanner = new Scanner(System.in);
        boolean inputLoop1 = true, inputLoop2 = true;
        int num1 = 0, num2 = 0;

        System.out.println("== Program pembagian sederhana ==");
        System.out.println();

        do
        {
            try
            {
                System.out.print("Masukkan angka pertama> ");
                num1 = scanner.nextInt();
                inputLoop1 = false;
            } catch (InputMismatchException e) {
                System.err.println("Exception: " + e);
                System.out.println("Masukkan sebuah angka!");
                scanner.nextLine();
            }
        } while(inputLoop1);

        inputLoop1 = true;

        do
        {
            try
                {
                do
                {
                    try
                    {
                        System.out.print("Masukkan angka kedua> ");
                        num2 = scanner.nextInt();
                        inputLoop1 = false;
                    } catch (InputMismatchException e) {
                        System.err.println("Exception: " + e);
                        System.out.println("Masukkan sebuah angka!");
                        scanner.nextLine();
                    }
                } while(inputLoop1);

                System.out.println("Hasil dari " + num1 + " / " + num2 + " = " + (num1 / num2));
                inputLoop2 = false;
            } catch (ArithmeticException ae) {
                System.err.println("Exception: " + ae);
                System.out.println("Pembagian angka dengan nol!");
                scanner.nextLine();

                inputLoop1 = true;
            }
        } while(inputLoop2);
    }
}