Ant build.xml for building java code

<project name="AddDaysToCurrentDate" basedir="." default="main" >
    <property name="src.dir" value="src" />
    <property name="build.dir" value="build" />
    <property name="classes.dir"  value="${build.dir}/classes" />
    <property name="jar.dir"  value="${build.dir}/jar" />


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

    <target name="compile" depends="clean" >
        <mkdir dir="${classes.dir}"/>
        <javac srcdir="${src.dir}" destdir="${classes.dir}"/>
    </target>

    <target name="jar" depends="compile" >
        <mkdir dir="${jar.dir}"/>
        <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}">
            <manifest>
                <attribute name="Main-Class" value="AddDaysToCurrentDate"/>
            </manifest>
        </jar>
    </target>

    <target name="run" depends="jar" >
        <java jar="${jar.dir}/${ant.project.name}.jar" fork="true"/>
    </target>
<target name="clean-build" depends="clean,jar"/>

    <target name="main" depends="clean,run"/>


</project>