Stack trace gives line numbers when src is present in package hierachy?

hi,
does anyone know why the lines numbers of the source code are only given in exception traces when the source code is present alongside the class files in the package hierachy?
I'm guessing this is because there is not enough information in the class files alone?
in which case, how does it work with the source file present??
thanks,
asjf

It has nothing to do with source code files... forget that idea completely.
However, it may be something to do with your just-in-time compiler.
At runtime, HotSpot might compile the java byte code ( solely in your class file ) into native/machine code and thus lose the line number information during that internal translation.
Try running your application with the -Xint parameter for java.exe. It will turn off the Just-in-time compiler so you should
get the line number information. ( assuming you compiled the class files with javac -g )

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