import java.io.*;
import javax.swing.JOptionPane;

public class MyType
{
    public static void main(String[] args)
    {
        //declaring variables
        String strChoice = " ", strTryString, strTryInt, strTryDouble;
        int choice, tryInt;
        double tryDouble;
        boolean done = false;
        double A;


        //loop while not done
        while (!done)
        {

            try
                {
                    String message = "What is My Type?:" + "\n\n1)String\n2)Integer\n3)double\n4)Quit the program\n\n";
                    
                    choice = Integer.parseInt(strChoice);

                    //test for valid choice 1, 2, 3, or 4
                    if (choice<1 || choice>4) throw new NumberFormatException();
                    else done = true;

                }

            catch (NumberFormatException e)

                {
                    JOptionPane.showMessageDialog(null, "Please enter a 1, 2, 3 or 4:",  "Error", JOptionPane.INFORMATION_MESSAGE);

                        switch(choice)

                            {
                                case 1:

                                    JOptionPane.showInputDialog(null,"Any Letter Is A String");
                                    break;
                                 case 2:
                                    JOptionPane.showMessageDialog(null, "Correct!");
                                    tryInt = Integer.parseInt(strChoice);
                                    break;


                                case 3:
                                     JOptionPane.showMessageDialog(null, "Correct!");
                                        tryDouble = Integer.parseInt(strChoice);
                                        break;
                                case 4:
                                    done = true; JOptionPane.showMessageDialog(null,"Closing!");
                                    System.exit(0);
                                    break;
                                    default:  throw new NumberFormatException();
                            }

                    }

                            {

                            JOptionPane.showMessageDialog(null, "Invalid, try again.");
                            }



        }
    }
}