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Thread: hi everyone!! I'm new to java programming.. can you help me out? please

  1. #1
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    Unhappy hi everyone!! I'm new to java programming.. can you help me out? please

    hi everyone!! I'm new to java programming.. Can you help me out? please?

    I made a simple calculator program, and i don't know if it's right.. There's no errors but it won't run? please help me solve my problem.. Thanks in advance..



     
    package simplecalculator;
     
    import javax.swing.*;
    import java.util.Scanner;
     
    public class simplecalculator
    {
        static Scanner input = new Scanner(System.in);
     
        public static void main(String[] args)
        {
            int choice;
     
                do{
                System.out.println(" *************************** ");
                System.out.println("     Tonelete's Calculator   ");
                System.out.println(" *************************** ");
                System.out.println("                             ");
                System.out.println("      (a) ADDITION           ");
                System.out.println("      (b) SUBTRACTION        ");
                System.out.println("      (c) MULTIPLICATION     ");
                System.out.println("      (d) DIVISION           ");
                System.out.println("      (e) QUIT               ");
                System.out.println("                             ");
                System.out.println(" *************************** ");
                System.out.println("Your choice: ");
                choice = input.nextInt();
                }while (choice < 'a' || choice > 'e');
     
                switch (choice)
                {
                    case 'a':
                        add();
                        break;
     
                    case 'b':
                        minus();
                        break;
     
                    case 'c':
                        times();
                        break;
     
                    case 'd':
                        divide();
                        break;
     
                    case 'e':
                        System.exit(0);
                        break;
                }
     
            }
     
        private static void add() {
            int x, y, sum = 0;
            int again;
            String output;
     
                        JOptionPane.showMessageDialog(null, "ADDITION");
                            x = Integer.parseInt
                                (JOptionPane.showInputDialog(null, "Enter first Number"));
                            y = Integer.parseInt
                                (JOptionPane.showInputDialog(null, "Enter second Number"));
                        sum = x + y;
                        output = "The Sum is " + sum + ".";
                        JOptionPane.showMessageDialog(null, output);
                        System.out.println("Try Again? (Y/N):  ");
                        again = input.next().charAt(0);
               if (again == 'Y' || again == 'y');
        }
     
        private static void minus() {
            int x, y, difference = 0;
            int again;
     
            String output;
     
                        JOptionPane.showMessageDialog(null, "SUBTRACTION");
                            x = Integer.parseInt
                                (JOptionPane.showInputDialog(null, "Enter first Number"));
                            y = Integer.parseInt
                                (JOptionPane.showInputDialog(null, "Enter second Number"));
                        difference = x - y;
                        output = "The difference is " + difference + ".";
                        JOptionPane.showMessageDialog(null, output);
                        System.out.println("Try Again? (Y/N):  ");
                        again = input.next().charAt(0);
               if (again == 'Y' || again == 'y');
        }
     
        private static void times() {
            int x, y, product = 0;
            int again;
     
            String output;
     
                        JOptionPane.showMessageDialog(null, "MULTIPLICATION");
                            x = Integer.parseInt
                                (JOptionPane.showInputDialog(null, "Enter first Number"));
                            y = Integer.parseInt
                                (JOptionPane.showInputDialog(null, "Enter second Number"));
                        product = x * y;
                        output = "The Product is " + product + ".";
                        JOptionPane.showMessageDialog(null, output);
                        System.out.println("Try Again? (Y/N):  ");
                        again = input.next().charAt(0);
               if (again == 'Y' || again == 'y');
        }
     
         private static void divide() {
             int x, y;
             double quotient;
             int again;
     
             String output;
     
                        JOptionPane.showMessageDialog(null, "DIVISION");
                            x = (int) Double.parseDouble
                                (JOptionPane.showInputDialog(null, "Enter first Number"));
                            y = (int) Double.parseDouble
                                (JOptionPane.showInputDialog(null, "Enter second Number"));
                        quotient = x / y;
                        output = "The Quotient is " + quotient + ".";
                        JOptionPane.showMessageDialog(null, output);
                        System.out.println("Try Again? (Y/N):  ");
                        again = input.next().charAt(0);
               if (again == 'Y' || again == 'y');
        }
    }

    THANKS in ADVANCE...


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: hi everyone!! I'm new to java programming.. can you help me out? please

    but it won't run
    Please explain what happens when you try to execute it.

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