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help learing JAVA

Posted on 2011-09-19
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Last Modified: 2012-05-12
I am attempting to learn Java for a hobby (haven't written code in 15 years) I am using netbeans and found a good document on oracle.com to help get started however either I am missing the obvious or there is a problem with this site. I'm hoping someone can tell me how to get this to work.

The article is http://www.oracle.com/technetwork/java/netbeans-part1-142734.html#figure7. If you scroll down a bit it tells you to name the variable jlabel6, jlable7 and jlabel8 to  ******

When I try that it says it is not a valid variable name. I would think that it needs to be variable name, not asterisks since it will be the results of a calculated field.

Any help for a beginner is very much appreciated.
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Question by:ajdratch
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8 Comments
 
LVL 47

Expert Comment

by:for_yan
ID: 36561876
They recommedn to change not the variable name but the contenst of the text of the label
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LVL 40

Expert Comment

by:gurvinder372
ID: 36561883
i guess that is the label of the field rather than the  name
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LVL 47

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by:for_yan
ID: 36561895
Variable name in java can only start with letter and contain charcacters , distis and underscore
They are talking about the contesnt of the text of the lable this contents is data - struig and it can be blank, or asteriksk, or amny
printesd symnbols,
the name of the variables does not need to be changed at this point
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LVL 47

Expert Comment

by:for_yan
ID: 36561908
I think they misplace this remark, yuou cannot change jlablel to ****

To rename a component, right-click it in either the Design Editor or the Inspector and choose Change Variable Name. Change names for the following components:

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LVL 47

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by:for_yan
ID: 36561942

This part

Variable  Text  
jLabel6  **********
jLabel7  **********
jLabel8  **********
jTextField1  [blank]
jTextField2  [blank]

is obviously jsut continuation of this part

Variable  Text  
jLabel1  Hours Worked:
jLabel2  Rate/ Hour ($):
jLabel3  Regular Pay:
jLabel4  Overtime Pay:
jLabel5  Total:
jButton1  Compute

On the left side is the conteents of the text of the lable or JTextFiled (blanks for JTextfIleds of course)


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LVL 14

Expert Comment

by:nishant joshi
ID: 36561943
you first learn what is oops and kearn c# first this might helps in feature also..
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Accepted Solution

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for_yan earned 500 total points
ID: 36561945
I meant:
On the right side is the conteents of the text of the lable or JTextFiled (blanks for JTextfIleds of course)
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Author Closing Comment

by:ajdratch
ID: 36563215
It looks like they left out some information. I needed to name those variables according to the last lines of code

regularPayField.setText(" " + nfRegular.format(regularPay));
overtimePayField.setText(" " + nfOverTime.format(overTimePay));
totalField.setText(" " + nfTotal.format(total));
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