Thread: Can't figure out why my program isn't outputting.

import javax.swing.JOptionPane;
public class CarlysEventPriceWithMethods
{   
    public static void main(String args [])
    {
        returnGuests();
        displayMotto();
        displayMath();
    }  
    public static int returnGuests()
    {
        int guestsString;
        guestsString = JOptionPane.showInputDialog(null, 
            "Enter the number of guests: ",
            JOptionPane.INFORMATION_MESSAGE);
        return guestsString;
    }
    public static void displayMotto()
    {
        JOptionPane.showMessageDialog(null, 
        "\n*************************************************" + 
        "\n*Carly's makes the food that makes it a party.*" + 
        "\n*************************************************");
    }
    public static void displayMath()
    {
        final int PER_PERSON = 35;
        double cost;
        int selection;
        boolean isYes;
 
        cost = Double.parseDouble(guestsString) * PER_PERSON;
 
        JOptionPane.showMessageDialog(null, "The number of guests: " + guestsString + 
        "\nThe price per guest is $" + PER_PERSON + "\nThe total cost: $" + cost);
 
        selection = JOptionPane.showConfirmDialog(null, "Will the event have 50 or more guests?");
        isYes = (selection == JOptionPane.YES_OPTION);
        JOptionPane.showMessageDialog(null, "You responded " + isYes + "\nThis is a large event!");
    }
 
}

What do you see when the program is compiled and executed? Are there any errors?
What do you want to see?

Please edit your post and wrap your code with code tags:

[code]
**YOUR CODE GOES HERE**
[/code]

to get highlighting and preserve formatting.

First you need to get a compile without any errors. If there are compiler errors, the program will not execute.
How are you compiling the program?
Do you get any error messages?
Please copy the full text of all error messages and paste it here. It has important info about the error.

I did. This is the error:

Exception in thread "main" java.lang.Error: Unresolved compilation problem:
Type mismatch: cannot convert from String to int

at CarlysEventPriceWithMethods.returnGuests(CarlysEve ntPriceWithMethods.java:13)
at CarlysEventPriceWithMethods.main(CarlysEventPriceW ithMethods.java:6)
The problem says:
CarlysEventPriceWithMethods.java is a non-project file, only syntax errors are reported. Java (16) [1,1]

You need to copy the full text of the error messages. What you posted only gives the line number, and not the error message.
Here are some sample errors

 
TestCode20.java:634: error: cannot find symbol
       x = y;
       ^
  symbol:   variable x
  location: class TestCode20
TestCode20.java:634: error: cannot find symbol
       x = y;
           ^
  symbol:   variable y
  location: class TestCode20
2 errors

--- Update ---

@sproket Thanks for trying to help.
However by giving the OP the fixes for the code without the OP learning how to read and understand the text of an error message won't help the OP be able to fix future errors.

Take a look at this: http://www.javaprogrammingforums.com...n-feeding.html

Type mismatch: cannot convert from String to int

at CarlysEventPriceWithMethods.returnGuests(CarlysEve ntPriceWithMethods.java:13)

The method called on line 13 returns a String value which can not be assigned to an int variable.
Change the guestsString variable to String instead of int.

What source line is the error on? The error message is missing that.

Did you post all of the source code? Where is the code for the other methods?