Java/Ant/Delete Clean

Ant: Remove all generated files

<?xml version="1.0"?>
<project name="Template Buildfile" default="compile" basedir=".">
  <property name="dir.src" value="src"/>
  <property name="dir.build" value="build"/>
  <property name="dir.dist" value="dist"/>
  <!-- Creates the output directories -->
  <target name="prepare">
    <mkdir dir="${dir.build}"/>
    <mkdir dir="${dir.dist}"/>
  </target>
  <target name="clean"
          description="Remove all generated files.">
    <delete dir="${dir.build}"/>
    <delete dir="${dir.dist}"/>
  </target>
  <target name="compile" depends="prepare"
          description="Compile all source code.">
    <javac srcdir="${dir.src}" destdir="${dir.build}"/>
  </target>
  <target name="jar" depends="compile"
          description="Generates jexp.jar in the "dist" directory.">
    <jar jarfile="${dir.dist}/jexp.jar" 
         basedir="${dir.build}"/>
  </target>
</project>

Ant target: clean

<?xml version="1.0"?>
<project name="sample" default="test" basedir=".">
   <target name="compile">
      <mkdir dir="build"/>
      <javac destdir="build"
             debug="on"
             optimize="on">
         <src path="src"/>
      </javac>
   </target>
   <target name="test" depends="compile">
      <java fork="no" failonerror="yes"
            classname="test.TestSample"
            classpath="build">  
          <arg line=""/>
      </java>
   </target>
   <target name="clean">
      <delete dir="build"/>
   </target>
</project>