build.xml

<?xml version="1.0"?>
<project name="${project.name}" default="main">

	<!--- Including properties file  here-->
	<property file="build.properties"/>

	<target name="init">
		<!-- Create the time stamp -->
		<tstamp />
		<!-- Create the build directory structure used by compile -->
		<mkdir dir="${build.dir}" />
	</target>

	<target name="compile" depends="init" description="Compile all the Java source files ">
		<!-- Compile the java code from ${src.dir} and put it into ${build.dir} -->
		<javac includeantruntime="false" srcdir="${src.dir}" destdir="${build.dir}" />
	</target>

	<target name="jar"  description="Creating the package and put into to ${dist.dir}">

		<!-- Create the distribution directory -->
		<mkdir dir="${dist.dir}" />

		<!-- Put everything in ${build} into the {$project.name}-${DSTAMP}.jar file -->
		<jar jarfile="${dist.dir}/${project.name}-${DSTAMP}.jar" basedir="${build.dir}" >
			<manifest>
				<attribute name="Main-Class" value="com.mt.general.HelloWorld" />
			</manifest>
		</jar>
	</target>

	<target name="clean" description="This target will deletes all previous build files">
		<delete dir="${build.dir}" />
		<delete dir="${dist.dir}" />
	</target>

	<!-- Default, run this target -->
	<target name="main" depends="clean, compile, jar,run" >
		<echo> Build is done </echo>
	</target>
	 
	 <target name="run">
        <java jar="${dist.dir}/${project.name}-${DSTAMP}.jar" fork="true"/>
    </target>

	
</project>