Disable keyword highlighting in lstset

Question

I have the following lstset defined for my listings

\lstset{
    numbers=left,                
    numberstyle=\scriptsize,
    tabsize=4,
    rulecolor=,
    language=java,
        basicstyle=\scriptsize,
        upquote=true,
        aboveskip={1.5\baselineskip},
        columns=fixed,
        showstringspaces=false,
        extendedchars=true,
        breaklines=true,
        prebreak = \raisebox{0ex}[0ex][0ex]{\ensuremath{\hookleftarrow}},
        frame=single,
        showtabs=false,
        showspaces=false,
        showstringspaces=false,
        identifierstyle=\ttfamily,
}

However, the issue is that when I create some java code in a listings, the keywords, such as private, boolean, return etc are hightlighted in bold. I do not want this. Is it possible to disable the bold keyword highlighting?

Answer 1

There is a key/value parameter named keywordstyle=<value> in which you can redefine the keyword style.

The default settings are: keywords are typeset bold and comments in italic shape. Adding keywordstyle=\ttfamily to \lstset will redefine it:

\documentclass{article}

\usepackage{listings}
\usepackage{upquote}

\lstset{
    numbers=left,                
    numberstyle=\scriptsize,
    tabsize=4,
    rulecolor=,
    language=java,
        basicstyle=\scriptsize,
        upquote=true,
        aboveskip={1.5\baselineskip},
        columns=fixed,
        showstringspaces=false,
        extendedchars=true,
        breaklines=true,
        prebreak = \raisebox{0ex}[0ex][0ex]{\ensuremath{\hookleftarrow}},
        frame=single,
        showtabs=false,
        showspaces=false,
        showstringspaces=false,
        identifierstyle=\ttfamily,
        keywordstyle=\ttfamily
}

\begin{document}

\begin{lstlisting}
public class HelloWorld {

    // main method
    public static void main(String[] args) {
        System.out.println("Hello world");
    }
}
\end{lstlisting}

\end{document}

The output:

Hope it helps. =)

Answer 2

In addition to Paulo's answer of changing the style of keywords to be identical to the surrounding text, you can also eliminate the set of recognised keywords by adding keywords={} after the language specification.

Code:

\documentclass{article}
\usepackage{listings}
\usepackage{upquote}

\lstset{
    numbers=left, numberstyle=\scriptsize,
    columns=fixed, frame=single, rulecolor=, aboveskip=1.5\baselineskip,
    showspaces=false, showstringspaces=false,
    showtabs=false, tabsize=4, extendedchars=true,
    breaklines=true, prebreak=\raisebox{0ex}[0ex][0ex]{\ensuremath{\hookleftarrow}},
    language=java,
    upquote=true,
    basicstyle=\scriptsize, identifierstyle=\ttfamily,
    keywords={}
}

\begin{document}

\begin{lstlisting}
public class HelloWorld {
    // main method
    public static void main(String[] args) {
        System.out.println("Hello world");
    }
}
\end{lstlisting}
\end{document}

Output: