Apache Ant is a Java-based build tool - like make, but without make's
wrinkles.  :-)

Ant is extended using Java classes. The configuration files are XML- based,
calling out a target tree where tasks get executed. Each task is run by an
object that implements a Task interface.

This package, and others available from Slackbuilds.org, are using the 
upstream recommendation of $ANT_HOME being /usr/share/ant.