build.xml

<?xml version="1.0"?>
<project name="helfy" default="build" basedir=".">
    <property name="build.dir"      value="build"/>
    <property name="src.dir"        value="src"/>
    <property name="test.dir"       value="test"/>
    <property name="lib.dir"        value="lib"/>
    <property name="target.jar"     value="${build.dir}/${ant.project.name}.jar"/>

    <target name="init">
        <mkdir dir="${build.dir}"/>
    </target>
    
    <target name="clean">
        <delete dir="${build.dir}"/>
    </target>

    <target name="clean-all" depends="clean">
        <delete dir="${lib.dir}"/>
    </target>

    <target name="build" depends="build-jar"/>

    <target name="compile-classes" depends="init">
        <echo message="Compiling classes..."/>
        <mkdir dir="${build.dir}/classes"/>
        <javac srcdir="${src.dir}:${test.dir}" destdir="${build.dir}/classes" includeantruntime="false"/>
    </target>

    <target name="build-jar" depends="compile-classes">
        <echo message="Building ${target.jar}..."/>
        <jar destfile="${target.jar}">
            <fileset dir="${build.dir}/classes" includes="**/*.class" />
        </jar>
    </target>

    <target name="run" depends="compile-classes">
        <java classpath="${build.dir}/classes" classname="one.helfy.HeapInfo"/>
    </target>
</project>