[codes=xml]
<project name="MyProject" default="compile">
 <property file="build.properties"/>
 <property name="build.debug" value="on"/>
 <property name="buiid.dir" location="build"/>
 
 <target name="init"  description="Create dir">
    <mkdir dir="build/classes"/>
    <mkdir dir="dist"/>
 </target>
 
 <path id="comiple.classpath">
    <pathelement location="${a.jar}"/>
    <pathelement location="${b.jar}"/>
 </path>
 
 <target name="compile" depends="init" description="Compile src file">
   <javac srcdir="${build.dir}" destdir="build/classes">
      <classpath>
         <pathelement location="lib/some.jar"/>          
      </classpath>
      <!-- use another classpath
        <classpath refid="compile.classpath"/>
      -->  
   </javac>
 </target>
 
 <fileset dir="dist" includes="*.jar" id="source.fileset/>
 <target name="archive" depends="compile" description="jar the classes!">
   <jar desfile="dist/project.jar" basedir="build/classes"/>
   <copy todir="deploy">
      <fileset refid="source.fileset"/>
   </copy>
 </target>
 
 <target name="execute" depends="compile" description="run the class">
    <java classname="com.unique.test.Hello" classpath="build/classes"
      <arg value="a"/>
    </java>  
 </target>
 
 <target name="clean" depends="init" decription="del the dir">
   <delete dir="build" />
   <delete  dir="dist" />
 </target>
</project>
[/codes]