build.xml

<project name="OpenChemLib" default="jar" basedir=".">

    <!-- those properties are generic and don't have to be changed-->
    <property name="project" value="${ant.project.name}" />

    <property name="src.dir" value="src/main/java" />
    <property name="res.dir" value="src/main/resources" />
    <property name="build.dir" value="build" />

    <path id="srcs">
        <dirset dir="." includes="${src.dir}" />
    </path>


    <!-- targets -->
    <target name="clean">
        <echo message="Cleaning..."/>
        <delete dir="${build.dir}" failonerror="false" />
    </target>

    <target name="compile">
        <mkdir dir="${build.dir}" />
        <javac
                destdir="${build.dir}"
                failonerror="true" source="1.8" target="1.8" debug="false" encoding="ISO-8859-1">

            <src refid="srcs" />

            <include name="**/*.java" />
        </javac>

        <copy overwrite="true" todir="${build.dir}">
            <fileset dir="${res.dir}" includes="**/*" />
        </copy>
    </target>

    <target name="jar" depends="compile">
        <jar basedir="${build.dir}" includes="**/*" excludes="**/*.jar" destfile="${build.dir}/${project}.jar" >
            <manifest>
                <attribute name="Created-By" value="${user.name}" />
            </manifest>
        </jar>
    </target>

</project>