By suppressing a line number, I mean something like the following:
Line 16 is split across two lines in the figure, but it's really one code statement, and I didn't want to have to refer to the statement using multiple line numbers in the text. Here is the LaTeX source for the key line:
String firstName = /*@\\@*/ /*@\underline{fullName.substring(0,spaceInd-1)};@*/
Note that since this snippet is used within the listings environment, the whitespace and the lack of a newline are significant. I used
\lstset{escapeinside={/*@}{@*/}} before this listing to declare the escape sequence for adding other formatting. The {\*@\\@*/} inserts a linebreak, and then the spaces before the next characters appear as indentation in the figure. Anyway, I googled around and couldn't find this trick, so hopefully this writeup will be useful to someone.
UPDATE (10/27/2008): In response to a request in a comment below, here is a minimal-ish full example that uses the technique. I've confirmed that this example works with the MacTex 2008 distribution (pdfTeXk, Version 3.1415926-1.40.9 and version 1.4 of the listings package).
\documentclass{article}
\usepackage{listings}
\lstset{escapeinside={/*@}{@*/}}
\begin{document}
\begin{figure}[t]
\begin{lstlisting}[numbers=left]
String firstName = /*@\\@*/ /*@\underline{fullName.substring(0,spaceInd-1)};@*/
\end{lstlisting}
\caption{Example illustrating suppression of line numbers.}
\end{figure}
\end{document}
