%% 
%%  A DANTE-Edition example
%% 
%%  Example 05-05-1 on page 174.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}

\usepackage{dcolumn}
\makeatletter \newcolumntype{s}[1]{%
  >{\DC@{.}{\sf\aftergroup\sf,}{#1}\sf}l<{\DC@end}}
\makeatother

\begin{document}
\sffamily
\begin{tabular}{ l s{1.0} s{1.2} s{3.1} }
test & \multicolumn{1}{l}{test1.0} &
       \multicolumn{1}{l}{test1.2} &
       \multicolumn{1}{l}{test3.1} \\\hline
test & 1 & 1.22 & 333.1\\ test & 2 & 3.44 & 444.1
\end{tabular}\par\medskip
$\mathsf{0123456789}$
\end{document}