line is not solid latex table code example

Example: latex dotted line

\documentclass{book}

\usepackage{arydshln}

\setlength{\dashlinedash}{0.2pt}
\setlength{\dashlinegap}{4.5pt}
\setlength{\arrayrulewidth}{0.2pt}

\begin{document}
\begin{tabular}{ll}
\hline
& \\
This is a & nice table \\
& \\
\hdashline
& \\
\end{tabular}


% Another combination of values
\setlength\dashlinedash{0.2pt}
\setlength\dashlinegap{1.5pt}
\setlength\arrayrulewidth{0.3pt}

\begin{tabular}{ll}
\hline
This is yet & another nice table \\
\hdashline
\end{tabular}


\end{document}