A sample ANT script to compile a java project and place the class files into build folder.
<?xml version="1.0"?>
<project name="test" default="compile" basedir=".">
<property name="src" value="."/>
<property name="build" value="build"/>
<target name="init">
<mkdir dir="${build}"/>
</target>
<target name="compile" depends="init">
<!-- Compile the java code -->
<javac srcdir="${src}" destdir="${build}"/>
</target>
</project>