Source not found

Hi, I am new to Eclipse, the version I use is 3.0. I have a project "classes", which contains a package "myFolder", and a servlet "myClass.java" in under "myFolder".

I wish to compile "myClass.java" in order to get myClass.class under myFolder. What I do to compile it, is by clicking on the debug button.(I can't find any compile option, so I choose debug instead, but is there any compile option?)

However, it prompts me a page called "Class File Editor"

The contents is
Source not found
The source attachment does not contain the source for the file URLClassLoader.class
You can change the source attachment by clicking Change Attached Source below:
...

How to deal with this situation?
LVL 9
william007Asked:
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avinthmCommented:
the class will be generated in myFolder . you dont have to compile it explicitly

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Mick BarryJava DeveloperCommented:
eclipse supports auto compilation, look under Project menu
avinthmCommented:
<eclipse home>\workspace\classes\myFolder
i think u will find your class file "myClass.class" in above folder

<eclipse home> - is the path where u have installed eclipse
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Mick BarryJava DeveloperCommented:
> I wish to compile "myClass.java" in order to get myClass.class under myFolder

goto your project setting>build path and set the output folder for your source folder
CEHJCommented:
If you look in your file system, you may find it's already compiled. As avinthm mentioned, compilation is done automatically by default
william007Author Commented:
Yes, thanks..I get the class.
But what is the error page about when I click on the debug button?
Mick BarryJava DeveloperCommented:
> But what is the error page about when I click on the debug button?

Its looking for the source to display in the debugger but doesn't know where it is
so it is asking you.
william007Author Commented:
Is the source refer to myClass.java?
When I click on the Change Attached Source button under it,
It prompts me a dialog and asks me to
"Select the location (folder, JAR or zip) containing the source for 'rt.jar',"
I select
C:/Program Files/Java/j2re1.4.2_05/lib/rt.jar,
After that I try to debug again,
the same problem still occur..

May I know how to solve it?
Mick BarryJava DeveloperCommented:
no its looking for URLClassLoader
point it as src.zip in the jdk base directory
CEHJCommented:
It's looking for a dependent class' source
william007Author Commented:
Thanks, I point it to src.zip, no error occur now.
My last question is may I know what is happening? Since src.zip contains all the source file(.java) for Java API, and it doesn't have any .class file that can be used..what eclipse trying to do with that src.zip?

Followed is the problem when I click on Run...
http://www.experts-exchange.com/Web/Web_Languages/JSP/Q_21800641.html

And those are the related question
http://www.experts-exchange.com/Web/Web_Languages/JSP/Q_21800638.html
http://www.experts-exchange.com/Web/Web_Languages/JSP/Q_21800643.html
Mick BarryJava DeveloperCommented:
it needs them to display source during debugging.
the class file does not contain source, just byte code
william007Author Commented:
Fantastic, thanks:-)
Mick BarryJava DeveloperCommented:
no worries :)
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