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Eclipse.ini VM / JAVA_HOME Settings [message #931811]

Wed, 03 October 2012 10:50

Eric Bresie
Messages: 44
Registered: July 2009

Member

My machine's JDK was recently updated, removing the previous version and installing a new one. Following the update I had an error when starting up Eclipse (3.5.2 on Windows 7) indicating it could not find the JRE.

Based on http://wiki.eclipse.org/FAQ_How_do_I_run_Eclipse%3F#Find_the_JVM, it indicates "Eclipse DOES NOT consult the JAVA_HOME environment variable" and suggests modifying the eclipse.ini to set the vm setting to the applicable path.

Why does Eclipse not utilize the JAVA_HOME environment variable? At the very least, if vm setting is not set, why not look to the JAVA_HOME variable as a default?

Is there a general rule of thumb when dealing with environment variables from within Eclipse that might help me understand some of this?

Does finding and specifying the default JRE from within Eclipse..Preferences...Java...Installed JRE effect the vm setting?

Eric

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Re: Eclipse.ini VM / JAVA_HOME Settings [message #931830 is a reply to message #931811]

Wed, 03 October 2012 11:09

Russell Bateman
Messages: 2733
Registered: July 2009
Location: Provo, Utah, USA

Senior Member

On 10/3/2012 8:50 AM, Eric Bresie wrote:
> My machine's JDK was recently updated, removing the previous version and
> installing a new one. Following the update I had an error when starting
> up Eclipse (3.5.2 on Windows 7) indicating it could not find the JRE.
>
> Based on
> http://wiki.eclipse.org/FAQ_How_do_I_run_Eclipse%3F#Find_the_JVM, it
> indicates "Eclipse DOES NOT consult the JAVA_HOME environment variable"
> and suggests modifying the eclipse.ini to set the vm setting to the
> applicable path.
> Why does Eclipse not utilize the JAVA_HOME environment variable? At the
> very least, if vm setting is not set, why not look to the JAVA_HOME
> variable as a default?
>
> Is there a general rule of thumb when dealing with environment variables
> from within Eclipse that might help me understand some of this?
>
> Does finding and specifying the default JRE from within
> Eclipse..Preferences...Java...Installed JRE effect the vm setting?
>
>
>
> Eric

--why I advise someone download and install a proper Sun JDK from Oracle
and put it in a private location, then link Eclipse up to it instead of
using the one already on your computer host which gets (and should get)
updated from time to time. I even have two or three different versions
of Java in support of projects where I need that sort of thing (though
this is less common in work I do now).

Preferences -> Java -> Installed JRE does not affect the JRE Eclipse
runs on (which should be specified via the -vm option in eclipse.ini).

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