Multiple Java versions

[Jung-uk Kim]

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On 2013-09-25 15:08:16 -0400, Gary Aitken wrote:
> On 09/25/13 12:54, Gary Aitken wrote:
>> On 09/25/13 00:38, Andrea Venturoli wrote:
>>> On 09/25/13 08:28, Jason Helfman wrote:
>>> 
>>>> java/javavmwrapper
>>>> 
>>>> cc: java
>>> 
>>> Sorry for being so dumb, but I don't understand this... I
>>> though I was using javavmwrapper... what do you mean?
>> 
>> I believe you are correct in your original statement, and that
>> there is something wrong with the java startup script.
>> 
>> You do not need to set JAVA_HOME. The startup script has code to
>> locate all installed versions, set JAVA_HOME if not already set, 
>> prioritize them, and execute the latest one; but it doesn't seem
>> to be working properly.
>> 
>> There is no javavmwrapper, at least in my installation(s). The
>> java startup script (/usr/local/bin/java) indicates it is itself 
>> javawrapper.sh.
>> 
>> If JAVA_HOME is not set, the startup script finds a java by using
>> make, and that finds openjdk6 when openjdk6 and openjdk7 are both
>> installed. In this case, the script is not using the installed
>> prioritization list in /usr/local/etc/javavms.  It seems to me it
>> should be checking this before resorting to what make finds.
>> 
>> However, you can avoid this behavior and get the right thing by
>> setting JAVAVM_FALLBACK_ONLY=1
> 
> My mistake. It is operating as advertised, although I think it's
> crazy that bsd.java.mk should be choosing openjdk6 over openjdk7.
> 
> But if what you want is the prioritization set in
> /usr/local/etc/javavms,

No, it is NOT the place for preference as I said earlier.  In fact, it
has (almost) no user serviceable part in it.

> then you want to set JAVAVM_FALLBACK_ONLY instead of JAVA_HOME

No, it seems JAVA_VERSION is what you want.

Jung-uk Kim
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