Very basic calculator using methods

import java.util.Scanner;

public class Calculator

          public static void main(String[] args)

                   Scanner kb = new Scanner(System.in);

                   System.out.println("Simple Calculator");

                   System.out.println("\nHere are your options:");

        System.out.println("\n1. Addition");

        System.out.println("2. Subtraction");

        System.out.println("3. Division");

        System.out.println("4. Multiplication");

                  System.out.print("\nWhat would you like to do?: ");

        int choice = kb.nextInt();

        System.out.println();

                   if (choice == 1)

            addition();

        else if (choice == 2)

            subtraction();

        else if (choice == 3)

            division();

        else if (choice == 4)

            multiplication();

                  System.out.println();

        kb.close();

               public static void addition()

                  int nOne, nTwo;

        Scanner kb = new Scanner(System.in);

        System.out.println("Addition");

                  System.out.print("\nFirst Number: ");

        nOne = kb.nextInt();

                  System.out.print("\nSecond Number: ");

        nTwo = kb.nextInt();

        kb.close();

        System.out.println("\nSum: " + nOne + " + " + nTwo + " = " + (nOne + nTwo));

               public static void subtraction()

        int nOne, nTwo;

        Scanner kb = new Scanner(System.in);

                 System.out.println("Subtraction");

                  System.out.print("\nFirst Number: ");

        nOne = kb.nextInt();

                  System.out.print("\nSecond Number: ");

        nTwo = kb.nextInt();

                   kb.close();

        System.out.println("\nSum: " + nOne + " - " + nTwo + " = " + (nOne - nTwo));

               public static void division()

        int nOne, nTwo;

        Scanner kb = new Scanner(System.in);

                  System.out.println("Division");

                  System.out.print("\nFirst Number: ");

        nOne = kb.nextInt();

                  System.out.print("\nSecond Number: ");

        nTwo = kb.nextInt();

        kb.close();

        System.out.println("\nSum: " + nOne + " / " + nTwo + " = " + (nOne / nTwo));

    public static void multiplication()

        int nOne, nTwo;

        Scanner kb = new Scanner(System.in);

        System.out.println("Multiplication");

                  System.out.print("\nFirst Number: ");

        nOne = kb.nextInt();

                  System.out.print("\nSecond Number: ");

        nTwo = kb.nextInt();

                   kb.close();

        System.out.println("\nSum: " + nOne + " x " + nTwo + " = " + (nOne * nTwo));

Building a calculator in java with a switch

import java.util.Scanner;

public class Calculator

 public static void main (String[] args)

        Scanner scan = new Scanner(System.in);

        System.out.println("Please enter the first number: > ");

        int num1 = scan.nextInt();

        System.out.println("Please enter the second number: > ");

        int num2 = scan.nextInt();

        System.out.println("Please enter the method you would like to use "

                + "(+ , - , * , / , ^ ) > " );

        String method = scan.next();

        char operation = method.charAt(0);

        String output = "";

        switch(num1)

                case 0: output+= "zero";

                        break;

                case 1: output+= " one";

                        break;

                case 2: output+= " two";

                        break;

                case 3: output+= " three";

                        break;

                case 4: output+= " four";

                        break;

                case 5: output+= " five";

                        break;

                case 6: output+= " six";

                        break;

                case 7: output+= " seven";

                        break;

                case 8: output+= " eight";

                        break;

                case 9: output+= " nine";

                        break;

                case 10: output+= " ten";

                        break;

      switch (operation)

          case '+' : output += " plus";

                     break;

          case '-' : output += " minus";

                     break;

          case '*' : output += " times";

                     break;

          case '/' : output += " divided by";

                     break;

          case '^' : output += " to the power of";

                     break;

     switch (num2)

               case 0: output += " zero";

                       break;

               case 1: output += " one";

                       break;

               case 2: output += " two";

                       break;

               case 3: output += " three";

                       break;

               case 4: output += " four";

                       break;

               case 5: output += " five";

                       break;

               case 6: output += " six";

                       break;

               case 7: output += " seven";

                       break;

               case 8: output += " eight";

                       break;

               case 9: output += " nine";

                       break;

               case 10: output += " ten";

                       break;

          int answer = 0 ;

       switch (answer)

           case '+' : answer = (answer + (num1 + num2));

               break;

           case '-' : answer = (answer + (num1 - num2));

               break;

           case '*' : answer = (answer + (num1 * num2));

               break;

           case '/' : answer = (answer + (num1 / num2));

               break;

           case '^' : answer = (answer + (int) (Math.pow(num1,num2) ));

               break;

       System.out.println(output + " equals " + answer );