How to make build.xml file?

1. Right click on the project

2. Go to the new>>file gives the filename as build.xml

Eg:

<project name="MyProject" default="usage" basedir=".">

<description>

     creating the simple build xml file

</description>

<!-- Set global property for this build file -->

<property name="src" value="${basedir}"/>

  <property name="jar" value="C:/Selenium/Jar file"/>

  <property name="build" value="build"/>

<!---Creating the Init Target>

<target name="init" >

<!--create timestamp--->

<tstamp/>

<!--create the build directory-->

<mkdir dir="${"build"}"/>

</target>

<!---Creating the Compile Target>

<target name="compile" depends="init" >

<!--compile the java source code from src to build dir--->

<javac srcdir="${"src"}" destdir="${"build"}"/>

</target>

<!---Creating the Dist Target>

<target name="dist" depends="compile" >

<mkdir dir="${"dist"}/lib"/>

<!---Put everything in ${build} into the myproject >

<jar jarfile="${"dist"}/lib/${ant.project.name}-${DSTAMP.jar}" basedir="${C:/project}"/>

</target>

<!---Creating the Clean Target>

<target name="clean" >

<delete dir="${"build"}"/>

<delete dir="${"dist"}"/>

</target>

</project>