Thread: JOptionPane

Hello everyone!

I'm in school and just starting to handle java and I'm having an issue with some code.

package ticketnumber;
import java.util.Scanner;
import javax.swing.JOptionPane;

public class TicketNumber {

public static void main(String[] args)
{

Scanner in = new Scanner(System.in);
int num, num2, remainder1, remainder2;
Boolean result;

// JOptionPane.showMessageDialog(null, "Messagehere", "Title here", JOptionPane.PLAIN_MESSAGE);

System.out.print("Enter your ticket number: ");
num = in.nextInt();


num2 = num/10;
remainder1 = num%10;
remainder2 = num2%7;
result = (remainder1 == remainder2);

System.out.println(num+" "+num2+" "+remainder1+" "+remainder2+" "+result);

JOptionPane.showMessageDialog (
null, result, "Ticket Validation", JOptionPane.PLAIN_MESSAGE);
System.exit ( 0 );

}

}

If you uncomment the first JOptionPane the code works correctly. With the comment in place the program simply hangs I'm assuming expecting more input? Any help at all would be appreciated.

-Thanks

Is there an error on line 23 where you have

result = (remainder1 == remainder2);

because, as far as I know, you are saying

result is remainder1 equals remainder2

which makes no sense.

Am I missing something? Hope I helped.

Originally Posted by copeg

Welcome to the forums. Please read the Forum Guidelines for useful information, including how to wrap your code in the code tags to preserve formatting.



I would recommend that you avoid mixing command line (Scanner/System.out.println) and Swing (JOptionPane) when attempting to get user input and provide output to the user. This being said your code expects input from the command line (num = in.nextInt()) - and will not proceed until it receives some.




That syntax is perfectly fine for the compiler - result is a boolean, and 'remainder1 == remainder2' is a comparison returning a boolean data type

Thank you. This sounds like sound advice I suppose. I'm used to C++ where I've never encountered an issue like this before. Thanks again.