Program kalkulator java

Source code program

public class Main {

 static int jumlah, inputan;

    static Scanner input = new Scanner (System.in);

    /**

     * @param args the command line arguments

     */

    public static void main(String[] args) {

        // TODO code application logic here

       String menu;

        char operator = '=';

        System.out.println("-- Program Kalkuator Java --");

        System.out.print("Masukkan angka yang akan dioperasikan : ");

        inputan = input.nextInt();

        jumlah = inputan;

        while (true){

System.out.println("==============================");

        System.out.println    ("     SIMBOL KALKULATOR     ");

          System.out.println("==============================");

          System.out.println("    (+)    ");

          System.out.println("    (-)    ");

          System.out.println("    (/)    ");

          System.out.println("    (x)    ");

          System.out.println("    (=)    ");

          System.out.println("==============================");

          System.out.println("     x (Keluar) ");

          System.out.println("==============================");

          menu=input.next();

            //mengubah String menjadi char

            if (menu.equals("+")) operator = '+';

            else if (menu.equals("-"))  operator = '-';

            else if (menu.equals("*")) operator = '*';

            else if (menu.equals("/")) operator = '/';

            else if (menu.equals("=")) operator = '=';

            else if (menu.equals("x")) operator = 'x';

            else operator = '!';

            switch (operator){

                case '+':

                    System.out.print(+jumlah+ " + ");

                    penjumlahan(inputan);

                    break;

                case '-':

                    System.out.print(+jumlah+ " - ");

                    pengurangan(inputan);

                    break;

                case '*':

                    System.out.print(+jumlah+ " * ");

                    perkalian (inputan);

                    break;

                case '/':

                    System.out.print(+jumlah+ " / ");

                    pembagian (inputan);

                    break;

                case '=':

                    System.out.println("Hasil = "+ jumlah);

                    break;

                case 'x':

                    System.out.println("Keluar");

                    System.out.println();

                    System.exit(0);

                    break;

                default :

                    System.out.println("Input salah.");

                    break;

            }

        }

    }

    public static void penjumlahan(int inputan) {

        inputan = input.nextInt();

        jumlah +=inputan;

    }

    public static void pengurangan(int inputan) {

        inputan = input.nextInt();

        jumlah -=inputan;

    }

    public static void perkalian(int inputan) {

        inputan = input.nextInt();

        jumlah *=inputan;

    }

    public static void pembagian(int inputan) {

        inputan = input.nextInt();

        jumlah /=inputan;

    }

}

Screenshoot Program