build.xml

<?xml version="1.0"?>

<project name="Java To TeX"
         default="jar"
         basedir=".">

  <property name="version"
            value="a"/>

  <property name="jar"
            value="java2tex-${version}.jar"/>

  <target name="clean">
    <delete dir="build"/>
    <delete file="${jar}"/>
    <ant dir="demo1" target="clean"/>
  </target>

  <target name="jar">
    <mkdir dir="build/classes"/>
    <javac optimize="on"
           debug="yes"
           debuglevel="source,lines,vars"
           destdir="build/classes"
           includeantruntime="false">
      <src path="src/"/>
    </javac>
    <jar destfile="${jar}">
      <fileset dir="build/classes"
               includes="**/*.class"/>
    </jar>
    <copy file="${jar}"
          todir="demo1/lib"/>
  </target>

</project>