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From Ashley Williams <ashpub...@mac.com>
Subject Re: Java in JDK but ANT can't find it!
Date Sat, 16 May 2009 15:25:08 GMT
Try adding these lines to the start of main():

System.out.println("java.home: " + System.getProperty("java.home"));
System.out.println("JAVA_HOME: " + System.getenv("JAVA_HOME"));
System.out.println("PATH:      " + System.getenv("JAVA_HOME"));

Ant will print out the error message if it can't find the class  
com.sun.tools.javac.Main
via the classloader, so I would suggest you convince yourself that  
your program can find
that class. Usually this will be true if you are running the program  
with jdk/bin/java and not jdk/jre/bin/java,
regardless of JAVA_HOME and java.home.

Try modifying the ant launch script and hardcode a path to jdk/bin/ 
java - if you no longer get
a warning message then you know you are on the right track.


On 16 May 2009, at 15:11, David Nemer wrote:

> Hello Martin,
>
> The vars are all set up right. And it is "not" an ANT problem. The  
> problem
> is that the "java.home" points to JAVA_HOME/jre , if I ever call  
> this method
> "System.getProperty("java.home");" it will return to me JAVA_HOME/jre
> (/opt/jdk1.6.0_06/jre in my case). And all we want is the pure  
> JAVA_HOME (no
> /jre).
>
> So I found this interesting post that explains better:
>
> "println ( System.properties.'java.home' );
>
> prints the path to the JRE for me as well. This is of course not  
> surprising
> and exactly as it should be since this is the path to the JVM, not  
> to the
> JDK.
>
> I think it is clear that the Ant error message is completely  
> misleading. I
> have added a bug report in the Ant Bugzilla (43794).
>
> I think we have to find out what Ant does internally to allow the  
> javac task
> to run, so that we know how Ant gets round this problem."
>
>
>
> --
> David Nemer
> Sent from Kaiserslautern, RP, Germany
>
> On Sat, May 16, 2009 at 3:50 PM, Martin Gainty <mgainty@hotmail.com>  
> wrote:
>
>>
>> Herr Nemer
>>
>> you would'nt be able to run ANT if your JAVA environment vars was  
>> fouled up
>> JRE_HOME points to JRE folder (which contains only java.exe)
>> JDK_HOME points to location of BASE FOLDER of javac.exe
>> PATH=%JDK_HOME%/bin
>>
>> Mit Freundliche Gruben
>> Martin
>> GMT+5
>> das Amerika
>> ______________________________________________
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>>
>>> Date: Sat, 16 May 2009 15:36:19 +0200
>>> Subject: Re: Java in JDK but ANT can't find it!
>>> From: davidnemer@gmail.com
>>> To: user@ant.apache.org
>>>
>>> Hello Supareno,
>>>
>>> I running it using the command line (running in a linux-server ).  
>>> And ant
>> is
>>> also running properly.
>>>
>>> Cheers,
>>> --
>>> David Nemer
>>>
>>>
>>> On Sat, May 16, 2009 at 12:51 PM, supareno <reno.rkcrew@free.fr>  
>>> wrote:
>>>
>>>> David ,
>>>>
>>>> are you using an IDE to run this simple code or are you using the
>> command
>>>> line?
>>>> is the 'ant' command line tool is working properly in a terminal?
>>>>
>>>> supareno
>>>>
>>>>
>>>> Hey all,
>>>>>
>>>>> Well, I did some testing, and I tried to run this simples Java  
>>>>> code:
>>>>>
>>>>>   public static void main(String args[]){
>>>>>
>>>>>        String JAVA_HOME = System.getProperty("java.home");
>>>>>        System.out.println(JAVA_HOME);
>>>>>
>>>>>   }
>>>>>
>>>>> And it prints out: /opt/jdk1.6.0_06/jre
>>>>>
>>>>> So, as Ashley said before, it is not an Ant's problem, it is an
>>>>> environment
>>>>> or Java problem.
>>>>>
>>>>> But, I checked, both, bash_profile and bashrc, and they all  
>>>>> point to
>>>>> /opt/jdk1.6.0_06, no JRE at all. So I was wondering where else  
>>>>> could I
>>>>> look
>>>>> at so I can find where this JRE is set.
>>>>>
>>>>> Does anyone know where the method System.getProperty goes to get  
>>>>> the
>>>>> java.home? Like a file or something like that??
>>>>>
>>>>> Cheers
>>>>>
>>>>> PS: I also used that code to call and in my java code.
>>>>>
>>>>> --
>>>>> David Nemer
>>>>> Sent from Kaiserslautern, RP, Germany
>>>>>
>>>>> On Thu, May 14, 2009 at 5:36 PM, Ashley Williams <ashpublic@mac.com

>>>>> >
>>>>> wrote:
>>>>>
>>>>>
>>>>>
>>>>>> I did a lot of copying and pasting from this website to get my  
>>>>>> own
>> code
>>>>>> up
>>>>>> and running:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>> http://www.ibm.com/developerworks/websphere/library/techarticles/0502_gawor/0502_gawor.html
>>>>>>
>>>>>> However I still believe the problem is with your environment  
>>>>>> rather
>> than
>>>>>> your code.
>>>>>> Try editing the ant batch file or shell script in order to  
>>>>>> print out
>>>>>> JAVA_HOME and PATH and
>>>>>> just at the point where it runs  
>>>>>> org.apache.tools.ant.launch.Launcher.
>>>>>>
>>>>>> Then print out all environment variables at the top of your  
>>>>>> build.xml
>>>>>> file.
>>>>>> And print out
>>>>>> java.home at the start of your java application.
>>>>>>
>>>>>> If you are forking the compiler, could it not be inheriting the
>>>>>> environment
>>>>>> correctly?
>>>>>>
>>>>>>
>>>>>> On 14 May 2009, at 16:22, Cole, Derek E wrote:
>>>>>>
>>>>>> Ashley,  can you post a snippet of how you set up the project you
>> launch
>>>>>>
>>>>>>
>>>>>>> programmatically from java?
>>>>>>>
>>>>>>> What does your build file that you are running from java  
>>>>>>> contain in
>> it?
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: Ashley Williams [mailto:ashpublic@mac.com]
>>>>>>> Sent: Thursday, May 14, 2009 10:54 AM
>>>>>>> To: Ant Users List
>>>>>>> Subject: Re: Java in JDK but ANT can't find it!
>>>>>>>
>>>>>>> Check your PATH to make sure you are launching your  
>>>>>>> application from
>>>>>>> the jdk and not the jre.
>>>>>>>
>>>>>>> I launch programatically and I don't get these errors with the
 
>>>>>>> same
>>>>>>> version of ant so it does
>>>>>>> sound as if the problem lies outside of ant.
>>>>>>>
>>>>>>> On 14 May 2009, at 15:46, David Nemer wrote:
>>>>>>>
>>>>>>> This is what I'm trying to tell you! My JAVA_HOME it is set as
>>>>>>>
>>>>>>>
>>>>>>>> /opt/jdk1.6.0_06 I've triple checked it on my bash file!
I also
>>>>>>>> check with
>>>>>>>> echo $JAVA_HOME and which java, they all tell the right path,
 
>>>>>>>> but
>>>>>>>> not ANT!
>>>>>>>> This is why I don't understand where does ant get this /jre
!!
>>>>>>>> --
>>>>>>>> David Nemer
>>>>>>>> Sent from Kaiserslautern, RP, Germany
>>>>>>>>
>>>>>>>> On Thu, May 14, 2009 at 4:42 PM, Ashley Williams <
>> ashpublic@mac.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>> In your description you say that  JAVA_HOME=/opt/jdk1.6.0_06/

>>>>>>>> jre
>>>>>>>>
>>>>>>>>
>>>>>>>>> Seriously, try JAVA_HOME= /opt/jdk1.6.0_06 instead
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On 14 May 2009, at 15:28, Cole, Derek E wrote:
>>>>>>>>>
>>>>>>>>> When I had this problem, I KNOW that JAVA_HOME was set
 
>>>>>>>>> correctly.
>> I
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> still ran into the problem. The OP here also said
JAVA_HOME  
>>>>>>>>>> was
>> set
>>>>>>>>>> correctly. There is some missing step here that prevents
 
>>>>>>>>>> the ant
>>>>>>>>>> Project
>>>>>>>>>> instance from knowing which Java to use.
>>>>>>>>>>
>>>>>>>>>> -----Original Message-----
>>>>>>>>>> From: Ashley Williams [mailto:ashpublic@mac.com]
>>>>>>>>>> Sent: Thursday, May 14, 2009 9:56 AM
>>>>>>>>>> To: Ant Users List
>>>>>>>>>> Subject: Re: Java in JDK but ANT can't find it!
>>>>>>>>>>
>>>>>>>>>> It looks like you are pointing to the jre not the
jdk.
>>>>>>>>>> Try repointing the JAVA_HOME environment variable
to the jdk
>>>>>>>>>> directory
>>>>>>>>>> instead,
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On 14 May 2009, at 13:15, David Nemer wrote:
>>>>>>>>>>
>>>>>>>>>> Hello Everyone,
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> I am running ANT programmatically in JAVA. So,
my task is to
>>>>>>>>>>> build the
>>>>>>>>>>> BUILD.XML.
>>>>>>>>>>> I'm able to do so, but it throws an exception
saying:
>>>>>>>>>>>
>>>>>>>>>>> /scratch2/nemer/test/xfire/build.xml:5: The following
error
>>>>>>>>>>> occurred
>>>>>>>>>>> while
>>>>>>>>>>> executing this line:
>>>>>>>>>>> /scratch2/nemer/test/xfire/build-common.xml:81:
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 "/opt/jdk1.6.0_06/jre"
>>>>>>>>>>>
>>>>>>>>>>> But in the end it says: BUILD SUCCESSFUL (but
it still  
>>>>>>>>>>> throws
>> that
>>>>>>>>>>> exception).
>>>>>>>>>>>
>>>>>>>>>>> I already set all of my environment variables
to
>> /opt/jdk1.6.0_06/
>>>>>>>>>>> (JAVA_HOME and also in PATH), which is a JDK!
And even on  
>>>>>>>>>>> the
>> error
>>>>>>>>>>> message
>>>>>>>>>>> it says that the java is set to /opt/jdk1.6.0_06/jre
 
>>>>>>>>>>> (which is a
>>>>>>>>>>> JDK, I
>>>>>>>>>>> don't know where it gets the jre from).
>>>>>>>>>>>
>>>>>>>>>>> So, does any one know how can I solve this problem?
Is  
>>>>>>>>>>> there a
>>>>>>>>>>> configuration
>>>>>>>>>>> file in ANT that we need to set up! I'm stuck
there!!
>>>>>>>>>>>
>>>>>>>>>>> I'm running the ant 1.7.1.
>>>>>>>>>>>
>>>>>>>>>>> Cheers,
>>>>>>>>>>> --
>>>>>>>>>>> David Nemer
>>>>>>>>>>> Sent from Saarbrucken, SL, Germany
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>> ---------------------------------------------------------------------
>>>>>>>>>>
>>>>>>>>>>
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>>>>>>>>
>>>>>>>>
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>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>> ---------------------------------------------------------------------
>>>>>>>>>>
>>>>>>>>>>
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>>>>>>>>
>>>>>>>>
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>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>> ---------------------------------------------------------------------
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>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
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>>>>>>> For additional commands, e-mail: user-help@ant.apache.org
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>>> For additional commands, e-mail: user-help@ant.apache.org
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>> For additional commands, e-mail: user-help@ant.apache.org
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> ---------------------------------------------------------------------
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>>>>
>>>>
>>
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