Spinner to Numaric Variable?

Posted on 2006-11-04
Last Modified: 2010-03-31
I have been working on a GUI Java program for a course I'm taking and I can't get a spinner to be treated as a numaric value so I can add it up and display it. I would ask my teacher, but he hardly speaks english and I usually come out more confused than when I started. So, please, please, please help be my teacher.

Here is the prob, I need the mondaySpinner and the tuesdaySpinner to add up and then average and display. I have left out the average, and the other days of the week, because I first wanted to see if I could get any number out of the spinners before going further. And, I know the code is really messy, but I get graded on whether it works, and the teacher doesn't look at the structure of the code.

Look at the file in this zip file:

Thanks in advance,

Question by:kickabury
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
  • 2
LVL 86

Expert Comment

ID: 17875708
You were going in the right direction:


but i would make Name implement ChangeListener and add it as a listener to both spinners. Each time there's a change, calculate the total and increment the number of changes that have occurred. When you're ready

avg = total / numberOfChanges
LVL 92

Expert Comment

ID: 17875786
> Number monday = mondaySpinner.getValue();

u were close, just need to cast

Number monday = (Number) mondaySpinner.getValue();

then do the same with tuesday

Number tuesday= (Number) tuesdaySpinner.getValue();

and sum:

int sum = monday.intValue() + tuesday.intValue();

and average:

double average = (double) sum / 2.0;
LVL 86

Expert Comment

ID: 17875795
You don't need to cast - get the int value as you were doing already, as i quoted above
Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

LVL 92

Expert Comment

ID: 17875891
alternatively if you don't want to cast keep a reference to the model and access it from there.

Number monday = mondaySpinnerModel.getNumber();

Author Comment

ID: 17876862
Thanks for the quick responses. I couldn't get the mondaySpinner.getNumber().intValue() to compile without erroring. Not sure why, but Number monday = (Number) mondaySpinner.getValue(); works. I was able to make "monday" display, but I can't get the average to work and display.

Here is the new zip file:
LVL 92

Accepted Solution

objects earned 500 total points
ID: 17877506

move that into your formatName method

   protected String formatName() {
        if (!NameSet) return "<<< Start.";

        String firstname = firstnameField.getText();
        String lastname = lastnameField.getText();
        String Sex = (String)SexSpinner.getValue();
        String idnumber = idnumberField.getText();
            Number monday = (Number)mondaySpinner.getValue();
            Number tuesday = (Number)tuesdaySpinner.getValue();
int total = monday.intValue() + tuesday.intValue();
double qAverage = (double)total / 2.0;
        String empty = "";

        if ((firstname == null) || empty.equals(firstname))
            firstname = "<em>(no First Name specified)</em>";
        if ((lastname == null) || empty.equals(lastname))
            lastname = "<em>(no Last Name specified)</em>";

        StringBuffer sb = new StringBuffer();
        sb.append("<html><p align=left>");
        sb.append(" ");

        return sb.toString();

Author Comment

ID: 17877897
Ahh. Nice. It works great. Thank you so much.

Before I close this out, one more quick question. I should probably add some simple directions like "Please enter the number of sales for each day of the week." I tried to add a JTextArea right above the mondaySpinner, it compiles, then spits out all kinds of crazy messages when I try to run it. Can I easily add a line of text, or should I leave good enough alone?

Thanks again.
LVL 92

Expert Comment

ID: 17879258
use a JLabel for that.

Author Comment

ID: 17880953
I put the instructions in the righthand box. It looks and works great. Thanks a million.

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
throw exception 21 79
java imports not found 4 71
How to configure empty element in XML Document parser? 15 59
dao vs facade design patterns 2 75
For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Suggested Courses

759 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question