If you need to run ant, you can install ant.
Unfortunately, if you do this, ant might not work. You may get an error like this:
Unable to locate tools.jar. Expected to find it in /usr/lib/jvm/java-1.5.0-gcj-4.3-184.108.40.206/lib/tools.jar
That file is actually part of the package java-gcj-compat-dev, which is for whatever reason not an ant dependency. Install it and the problem might go away.