Re: How to get the line number in the code?

From: Charles (csw_at_rogers.com)
Date: 10/07/03 

Date: Tue, 7 Oct 2003 10:03:04 -0400

Thank you very much for the information. While there is some overhead
involved, it doesn't look like I can get around it. Your solution works fine
and will be put to use.

"Chris" <chris2k01@hotmail.com> wrote in message
news:M5qgb.53644$AC3.1283917@news2.telusplanet.net...
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> Charles wrote:
>
> > Correct, I wish to be able to do this at runtime. I was hoping for a
> > quick and easy way to do this with minimum overhead.
>
> Hi,
> This is probably far from low-overhead (I've heard exceptions are
> fairly high-overhead, don't know about this), but it does work (if
> your class files are compiled with line numbers):
>
> Throwable t = new Throwable();
> t.fillInStackTrace(); /// WILL FIND NUMBER OF THIS LINE!
> int x = t.getStackTrace()[0].getLineNumber();
>
> As the docs say, if there is no debug info in the class file, you'll
> get a negative number. Of course, if you're trying to find the line
> number of an arbitrary line, it won't work. You can only find the
> line number of a line of code that was designed for the purpose of
> finding that line number.
>
> - --
> Chris
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