build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project default="jar">
    <target name="clean">
        <delete dir="./build/classes"/>
        <delete dir="./build"/>
    </target>
    <target name="compile" depends="clean">
        <mkdir dir="./build"/>
        <mkdir dir="./build/classes"/>
        <javac includeantruntime="true" srcdir="./src/com/netenrich" destdir="./build/classes"/>
    </target>
    <target name="jar" depends="compile">
        <mkdir dir="./build/jar"/>
        <jar destfile="./Main.jar" basedir="./build/classes">
        <zipgroupfileset dir="./lib" includes="*.jar"/>
            <manifest>
                <attribute name="Main-Class" value="com.netenrich.Main"/>
            </manifest>
        </jar>
    </target>
</project>