\begin{tikzpicture}
\umlemptyclass{A}
\umlemptyclass[x=4,y=2]{B}
\umldep[geometry=-|]{A}{B}
\umlassoc[geometry=-|, anchors=30 and 300, name=assoc1]{A}{B}
\umlassoc[geometry=-|, anchors=-30 and -60, name=assoc2]{A}{B}
\end{tikzpicture}