Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
Solved

# Spinner to Numaric Variable?

Posted on 2006-11-04
Medium Priority
203 Views
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 Name.java file in this zip file: http://www.instantinfo.net/Name.zip

James
0
Question by:kickabury
[X]
###### 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
• 4
• 3
• 2

LVL 86

Expert Comment

ID: 17875708
You were going in the right direction:

>>mondaySpinner.getNumber().intValue()

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
0

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;
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
0

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();
0

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: http://www.instantinfo.net/Name2.zip
0

LVL 92

Accepted Solution

objects earned 2000 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(firstname);
sb.append(" ");
sb.append(lastname);
sb.append("<br><br>");
sb.append(idnumber);
sb.append("<br><br>");
sb.append(Sex);
sb.append("<br><br>");
sb.append(qAverage);
sb.append("<br><br>");

return sb.toString();
}
0

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.
0

LVL 92

Expert Comment

ID: 17879258
use a JLabel for that.
0

Author Comment

ID: 17880953
I put the instructions in the righthand box. It looks and works great. Thanks a million.
0

## Featured Post

Question has a verified solution.

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

Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a clâ€¦
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 aâ€¦
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input: