Can't find JAVA_HOME, driving me crazy!

Jayla · 07-06-2008, 02:28 PM

Hey Guys

I did manage to find JAVA_HOME once, but after a restart the path was lost and now I have no idea how to find it again.

I'm on ubuntu hardy, 64bit. I need JAVA_HOME set so I can run a Grails application, heres what I've done so far..

Checked the $PATH

Code:

jimmy@nevada:~/Applications/bsplus/bs-plus$ echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/jimmy/Applications/grails-1.0.3/bin/

Have a look for where java might be

Code:

jimmy@nevada:~/Applications/bsplus/bs-plus$ whereis java
java: /usr/bin/java /etc/java /usr/lib/java /usr/lib64/java /usr/share/java

Set JAVA_HOME to where I think it should be

Code:

jimmy@nevada:~/Applications/bsplus/bs-plus$ echo $JAVA_HOME
/usr/lib/jvm/java-6-sun/jre/bin/

try running grails

Code:

jimmy@nevada:~/Applications/bsplus/bs-plus$ grails
grails: JAVA_HOME is not defined correctly; can not execute: java

Just out of interest...

Code:

jimmy@nevada:/usr/lib/jvm$ ls -l
total 12
drwxr-xr-x 7 root root 4096 2008-06-23 19:26 cacao
drwxr-xr-x 5 root root 4096 2008-05-10 23:32 java-1.5.0-gcj-4.2-1.5.0.0
lrwxrwxrwx 1 root root   19 2008-05-25 22:07 java-6-sun -> java-6-sun-1.6.0.06
drwxr-xr-x 6 root root 4096 2008-05-25 22:07 java-6-sun-1.6.0.06
lrwxrwxrwx 1 root root   26 2008-05-10 23:32 java-gcj -> java-1.5.0-gcj-4.2-1.5.0.0

Can anyone please give me a heads up on where I may be going wrong?

Regards

J

bigrigdriver · 07-06-2008, 02:58 PM

In my openSUSE installation, JAVA_HOME (for 64 bit) is /usr/lib64/jvm/jre.

JAVA_HOME=/usr/lib64/jvm/jre
export JAVA_HOME

trickykid · 07-06-2008, 03:46 PM

Quote:

Originally Posted by bigrigdriver

In my openSUSE installation, JAVA_HOME (for 64 bit) is /usr/lib64/jvm/jre.

JAVA_HOME=/usr/lib64/jvm/jre
export JAVA_HOME

Yup, just add this export to your users .login_profile or .bashrc so it's always set.

export JAVA_HOME=/path/to/java/jre

I like to eliminate the two step process and put the export in first line.

Jayla · 07-06-2008, 04:09 PM

Thanks for the replies guys

I've tried /usr/lib64/jvm/jre but grails still complains that Java home is still incorrectly set

Is there any "cheat" way of finding what it should be? I'm running Azureus which is a Java based torrent client, so I must already have a java home set someplace?

trickykid · 07-06-2008, 09:24 PM

Quote:

Originally Posted by Jayla

Thanks for the replies guys

I've tried /usr/lib64/jvm/jre but grails still complains that Java home is still incorrectly set

Is there any "cheat" way of finding what it should be? I'm running Azureus which is a Java based torrent client, so I must already have a java home set someplace?

Ok, I didn't know what grails is but now I looked it up. You clearly need SDK and not the JRE Java environment. From the looks, you only have JRE installed.

From the installation page http://grails.org/Installation

Code:

Prerequisites

In order to start using Grails you need to have the following:

    * An installation of Java SDK 1.4 or higher and have set your JAVA_HOME variable to the SDK install location.

Jayla · 07-07-2008, 03:22 AM

Thanks tricky

I have had it working on this machine before, and nothing on the Java side has been modified, how can I search for any folder containing "jdk"? As its possible I'm looking in the wrong places

bigrigdriver · 07-07-2008, 08:20 AM

su to root and run 'updatedb' (without quotes). Then use the locate command: locate jdk, or possibly slocate jdk.