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
Creating Instructional Tutorials  

For Any Use & On Any Platform

Contextual Guidance at the moment of need helps your employees/users adopt software o& achieve even the most complex tasks instantly. Boost knowledge retention, software adoption & employee engagement with easy solution.

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

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

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

Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.

623 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