Problem in running ant

[sireesha]

Hi Every One,
I am new to ant.To learn ant,i am following some online tutorials.when i tried to run ant from command prompt i got some errors.Here is my problem..

I have created a simple directory structure like
TestAnt
l
-->src-->HelloWorld.java
l
--> build.xml

When i tried to run ant from command prompt result was like this

Code:

E:\WINDOWS\java\TestAnt>ant
Unable to locate tools.jar. Expected to find it in E:\Program Files\Java\jre1.6.0_05\lib\tools.jar
Buildfile: build.xml

init:

compile:
    [javac] Compiling 1 source file to E:\WINDOWS\java\TestAnt\build

BUILD FAILED
E:\WINDOWS\java\TestAnt\build.xml:20: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK.
It is currently set to "E:\Program Files\Java\jre1.6.0_05"

Total time: 0 seconds

and my environment variable values are

Code:

path=E:\oraclexe\app\oracle\product\10.2.0\server\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;E:\WINDOWS\jdk6\bin;C:\apache-ant-1.7.0-bin\bin;

JAVA_HOME=E:\WINDOWS\jdk6\bin;E:WINDOWS\jdk6

ANT_HOME=C:\apache-ant-1.7.0-bin

Is there any mistake in my environment variables ?

My JAVA_HOME value is

Code:

E:\WINDOWS\jdk6\bin;E:WINDOWS\jdk6

But when i am running ant i got message like

Code:

Perhaps JAVA_HOME does not point to the JDK.
It is currently set to "E:\Program Files\Java\jre1.6.0_05"

Can any one please tell me what's wrong with this..


Thank q very much,
Sireesha.

[wsaryada]

Instead of JRE you should also have the JDK on your computer. JRE doesn't come with the javac command. Have you install the JDK?

[naresh_m]

Hi sireesha,
u have to the PATH variable as E:\Program Files\Java\jre1.6.0_05
and

[naresh_m]

Hi sireesha,
u have to set the the PATH variable as E:\Program Files\Java\jre1.6.0_05\bin
in envronment variable and CLASSPATH variable as C:\Program Files\Java\jdk1.5.0_15\lib\tools.jar; ok

[sireesha]

Hi,
Thank q very much for your replies ,I changed both path and classpath variables .Now this time i got a message like build successful.
But i am still getting message like Unable to locate tools.jar.
But this time my java class is compiled so i am happy.But i took this example from a site.So i didn't understand code written in build.xml.My build.xml file is

Code:

<project name="TestAnt" default="dist" basedir=".">
    <description>
        simple example build file
    </description>
  <!-- set global properties for this build -->
  <property name="src" location="src"/>
  <property name="build" location="build"/>
  <property name="dist"  location="dist"/>

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

  <target name="compile" depends="init"
        description="compile the source " >
    <!-- Compile the java code from ${src} into ${build} -->
    <javac srcdir="${src}" destdir="${build}"/>
  </target>

  <target name="dist" depends="compile"
        description="generate the distribution" >
    <!-- Create the distribution directory -->
    <mkdir dir="${dist}/lib"/>

    <!-- Put everything in ${build} into the MyProject-${DSTAMP}.jar file -->
    <jar jarfile="${dist}/lib/MyProject-${DSTAMP}.jar" basedir="${build}"/>
  </target>

  <target name="clean"
        description="clean up" >
    <!-- Delete the ${build} and ${dist} directory trees -->
    <delete dir="${build}"/>
    <delete dir="${dist}"/>
  </target>
</project>

Can any one please explain me what is use of this build.xml and different terms in this file..

and aslo

Can any please tell me how to use this build.xml ( or ant) in case of web applications.


I am really confused with using ant.I read different tutorials but i couldn't understand properly.I need some explanation..Please anybody give me some explanation in this topic...

Thank q very much,
sireesha.