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From: "david" <david@davidwbrown.name>
Subject: Re: Problems understanding classpath and package 
To: "Ant Users List" <user@ant.apache.org>
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Date: Sat, 29 Dec 2007 13:36:26 -0600 (CST)
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Hello Andrew, try ant -p to get a look at the Ant default environment. Packaging is part of Java and not peculiar to Ant. A good tool to use when packaging and jars are a mystery is Jarscan found at:

http://www.inetfeedback.com/jarscan/index.jsp

Insert the following Ant target snippet into your build.xml file and run: ant -p to make sure the newly inserted target is available. If you are successful at this point then run:

ant showclasspath

<!-- SNIPPET ANT TARGET TO BE INSERTED INTO BUILD.XML -->
<target name="showclasspath">
	<echo message="environment classpath: ${env.CLASSPATH}"/>
</target>
<!-- END SNIPPET -->

The returned results should show the default classpath according to your machines environment.

The above assumes some type of command line: Windows cmd, Linus bash terminal, Solaris korn shell, Mac command-line OS X terminal.

You should also be able to perform the above using your favorite IDE: Eclipse, IDEA, Netbeans, etc.

In the future to get better responses from the Ant community please initiate your email with more information such as:

Ant version: 1.7.x
OS: Debian 3.1 (or Windows XP SP2 or similar)
JDK: 1.6.x
Source: snippets only (build.xml, etc.)
Logs: Ant logs, system logs, application logs (error messages, exceptions etc.)
Environment: system variable values, ant properties (ex: classpath) etc.

If you are fairly new to Ant then in all-likelihood you are fairly new to Java. Some good resources follow:

http://courses.coreservlets.com/Course-Materials/java5.html
http://mindprod.com/jgloss/jgloss.html
http://www.codase.com/
http://java.sun.com/docs/books/tutorial/java/index.html
http://www.javaranch.com/
http://www.javalobby.org
http://www.dzone.com

HTH, David.

Andrew Connick wrote ..
> Hello
> 
> I am fairly new to Ant. I am trying to use it to compile java, but I am
> having problems with 'package does not exist' I assume it's a classpath
> issue. Although I can find plenty of advice on how to set the classpath,
> I
> cannot understand what it should be.
> 
> My directory structure is something like
> -  classes
>   - base
>     - A.java
>   - forms
>     - B.java
>   - build.xml
> - lib
> 
> The first two lines of classes\forms\B.java are:
> package tags;
> import base.*;
> 
> When I try to compile this with Ant, I get 'package does not exist'. My
> understanding of the documentation is that I should not need any classpath
> because it's the basedir. Also, if I run "ant -verbose" I see the following:
>     [javac] '-classpath'
>     [javac] 'C:\My Web Sites\CMS\V2\WEB-INF\classes;C:\Program Files\Apache
> Software.......
> 
> If  I run javac from the command line, with directory set to "classes"
> it is
> fine.
> 
> My classes\build.xml is:
> <project name="Compile all" default="jar" basedir=".">
>  <property name="jarfile" value="cms_v2.jar" />
> 
>  <target name="delete">
>   <delete><fileset dir="." includes="**/*.class"/></delete>
>  </target>
> 
>  <target name="compile" depends="delete">
>   <javac srcdir="base" destdir="." />
>   <javac srcdir="forms" destdir="." />
>  </target>
> 
>  <target name="jar" depends="compile">
>   <jar basedir="." destfile="../lib/${jarfile}" includes="**/*.class" />
>  </target>
> 
> </project>
> 
> Regards
> Andrew Connick
> 
> 
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