Updating Ant on JBuilder9 Enterprise

From Tools -> Configure Libraries, select the Ant library on the left hand side panel. You should see the following under the Class tab on the right hand side:

%JBUILDER_INSTALL_DIR%/lib/ant.jar
%JBUILDER_INSTALL_DIR%/lib/optional.jar
%JBUILDER_INSTALL_DIR%/lib/jbuilder.jar

Replace ant.jar and optional.jar (all but jbuilder.jar) with your Ant installation jars under %ANT_INSTALL_DIR%/lib.

Now I have all my Java IDE's (IDEA, Eclipse, JBuilder) in sync.