Turkish (İ) character inside code listings

Question

I'm using listings package to put java code in my tex files. There are some Turkish characters in the code. So, I'm using the literate directive for them to appear correctly. Everything works fine other than the "İ" character, the capital I with a dot on top. This character is not rendered correctly. My code is as follows:

\usepackage{listings}

\lstset{
   language=Java,
   captionpos=t,
   tabsize=3,
   frame=single,
   frameround=tttt
   backgroundcolor=\color{highlight},
   basicstyle=\footnotesize\ttfamily,
   keywordstyle=\color{javapurple}\bfseries,
   commentstyle=\color{javagreen},
   stringstyle=\color{javared},
   morecomment=[s][\color{javadocblue}]{/**}{*/},
   numbers=left,
   numberstyle=\tiny,
   numbersep=5pt,
   breaklines=true,
   showstringspaces=false,
   emph={label},
   inputencoding=utf8,
   extendedchars=true,
   % German umlauts
   literate=%
   {Ö}{{\"O}}1
   {Ä}{{\"A}}1
   {Ü}{{\"U}}1
   {ß}{{\ss}}1
   {ü}{{\"u}}1
   {ä}{{\"a}}1
   {ö}{{\"o}}1
   %Türkçe karakterler
   {ı}{{\i}}1
   {İ}{{\.{I}}}1    % This is the problem character.
   {ğ}{{\u{g}}}1
   {Ğ}{{\u{G}}}1
   {ş}{{\c{s}}}1
   {Ş}{{\c{S}}}1
   {ç}{{\c{c}}}1
   {Ç}{{\c{C}}}1
}

\begin{lstlisting}
    System.out.println("Test: ı ü ğ ş ç ö, İ Ü Ğ Ş Ç Ö ");
\end{lstlisting}

The output of this is as follows:

The letter shows incorrectly with a line close to bottom of the letter. The correct output should be like "İ", with a dot on top. I have several options to solve this. But none worked. Does anybody have a solution? Thank you...

Answer 1

I suggest you add the instructions

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}

to your preamble.

The following example had to modify the color coding choices since you didn't provide information about how the various java... colors are defined.

\documentclass{article}
\usepackage[utf8]{inputenc}  % assumes input is utf8-encoded
\usepackage[T1]{fontenc}
\usepackage{listings}
\usepackage{xcolor}
\begin{document}

\lstset{
   language=Java,
   captionpos=t,
   tabsize=3,
   frame=single,
   frameround=tttt
   backgroundcolor=\color{highlight},
   basicstyle=\footnotesize\ttfamily,
   keywordstyle=\color{purple}\bfseries,
   commentstyle=\color{green},
   stringstyle=\color{red},
   morecomment=[s][\color{blue}]{/**}{*/},
   numbers=left,
   numberstyle=\tiny,
   numbersep=5pt,
   breaklines=true,
   showstringspaces=false,
   emph={label},
   inputencoding=utf8,
   extendedchars=true,
   % German umlauts
   literate=%
   {Ö}{{\"O}}1
   {Ä}{{\"A}}1
   {Ü}{{\"U}}1
   {ß}{{\ss}}1
   {ü}{{\"u}}1
   {ä}{{\"a}}1
   {ö}{{\"o}}1
   %Türkçe karakterler
   {ı}{{\i}}1
   {İ}{{\.{I}}}1    % This is the problem character.
   {ğ}{{\u{g}}}1
   {Ğ}{{\u{G}}}1
   {ş}{{\c{s}}}1
   {Ş}{{\c{S}}}1
   {ç}{{\c{c}}}1
   {Ç}{{\c{C}}}1
}

\begin{lstlisting}
    System.out.println("Test: ı ü ğ ş ç ö, İ Ü Ğ Ş Ç Ö ");
\end{lstlisting}
\end{document}