Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.glorb.com!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
From: Lew <lewbloch@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: the classes in rt.jar cannot be found during ant build
Date: Mon, 2 Apr 2012 15:53:32 -0700 (PDT)
Organization: http://groups.google.com
Lines: 27
Message-ID: <29434054.1356.1333407212535.JavaMail.geo-discussion-forums@pbcvg9>
References: <21704562.1053.1333400837411.JavaMail.geo-discussion-forums@ynlt15>
NNTP-Posting-Host: 69.28.149.29
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
X-Trace: posting.google.com 1333407213 28987 127.0.0.1 (2 Apr 2012 22:53:33 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Mon, 2 Apr 2012 22:53:33 +0000 (UTC)
In-Reply-To: <21704562.1053.1333400837411.JavaMail.geo-discussion-forums@ynlt15>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=69.28.149.29; posting-account=CP-lKQoAAAAGtB5diOuGlDQk0jIwmH0T
User-Agent: G2/1.0
Xref: csiph.com comp.lang.java.programmer:13323

zyng wrote:
> In my build.xml,
>          <property environment="env"/> 
>          ...
>         <path id="project.classpath">
>             <fileset dir="${env.JAVA_HOME}">
>                 <include name="jre/lib/rt.jar"/>
>             </fileset>
>             ...
> 
> The environment variable JAVA_HOME has been set to: C:\Program Files\Java\jdk1.6.0_24
> 
> When I run it, those classes inside rt.jar cannot be found. I have print out, using echo, the classpath and rt.jar is included in the classpath.
> 
> I don't understand why the classes in rt.jar cannot be reached by javac.

You don't give a complete example, for which you should follow the advice given here:
http://sscce.org/

Did you use a "<classpath refid='...'>" element or "classpathrefid='...'" attribute to the "<javac>" element that refers to your path id?

You should not include rt.jar in a regular classpath anyway. That's wrong. It's a bootclasspath JAR. In fact, you shouldn't have to refer to it explicitly at all unless you're cross-compiling between Java versions.

Give us an SSCCE.

-- 
Lew