build.xml

<project name="Arc90 Game" default="all" basedir=".">
	<property name="alias" value="Robert"/>
  	<property name="keystore.password" value="crayon"/>
  	<property name="keystore" location="${user.home}/.keystore"/>
 	<property name="out.dir" location="${user.home}"/>
  
  	<target name="all" depends="init,game.jar,assets.jar" />

   	<!-- Initialize the build process. -->
  	<target name="init">
    	<!-- make sure the output directory exists -->
    	<mkdir dir="${out.dir}" />
    	</target>
  	<!-- Make the jar that contains only the game logic -->
  	<target name="game.jar">
    	<jar destfile="${out.dir}/game.jar">
	      	<fileset dir="bin" includes="**/*.class" />
      	</jar>
    	<signjar
	       alias="${alias}" 
	       storepass="${keystore.password}"
	       keystore="${keystore}" 
	       jar="${out.dir}/game.jar"/>
    	</target>
  <!-- make the resources jar -->
  <target name="assets.jar">
    <jar 
       destfile="${out.dir}/assets.jar"
       basedir="${basedir}/assets" />
    <signjar 
       alias="${alias}" 
       storepass="${keystore.password}" 
       keystore="${keystore}" 
       jar="${out.dir}/assets.jar" />
    </target>

</project>