which version of java to use?

jony127 · December 18, 2011, 2:36pm

Hello,

I have opensuse 11.4 with Sun Java. Would I recommend remove this version and install the openjdk java?

Can there be problems of compatibility?

Thank you.

martin_helm · December 18, 2011, 2:58pm

Am 18.12.2011 14:46, schrieb jony127:
>
> Hello,
>
> I have opensuse 11.4 with Sun Java. Would I recommend remove this
> version and install the openjdk java?
>
> Can there be problems of compatibility?
>
> Thank you.
>
>
Yes there can be problems with compatibility, some applications and web
based applets are programmed in a way which makes them not compatible
with openjdk. After oracle decided that with version 7 openjdk is the
reference implementation of java I expect in the future that this
problem will disappear sooner or later (I guess later).

So I would not remove it now if you have no special reason to do so.

Cloddy · December 18, 2011, 4:44pm

jony127 wrote:

>
> Hello,
>
> I have opensuse 11.4 with Sun Java. Would I recommend remove this
> version and install the openjdk java?
>
> Can there be problems of compatibility?
>

I had Sun Java in an 11.4 installation but LibreOffice complained about it
and after I switched to openjdk the complaints disappeared. So compatibilty
problems can work both ways.

–
Graham Davis, Bracknell, Berks.
openSUSE 12.1 (64-bit); KDE 4.7.4; AMD Phenom II X2 550 Processor;
Video: nVidia GeForce 210 (using nouveau driver);
Sound: ATI SBx00 Azalia (Intel HDA); Wireless: BCM4306

nrickert · December 18, 2011, 5:47pm

Openjdk was a bit iffy for me in opensuse 11.3. However, with 11.4 it worked quite well, at least until an update broke it. At that point I installed Sun Java, so I’m not actually sure whether openjdk was still broken for 11.4

I’m now using opensuse 12.1, and openjdk is working quite well. I don’t think Sun Java is available for 12.1 - at least not in the standard repos.

dth2 · December 18, 2011, 7:58pm

if openjdk works ok for you stick with that if you hit a problem you can remove it and install java from:-

Index of /repositories/Java:/sun:/Factory/openSUSE_Factory/x86_64

creatura85 · December 18, 2011, 9:07pm

openJDK is installed by default and should work but if you have issues remove it and install it as jony127 suggested.

martin_helm · December 18, 2011, 9:56pm

Am 18.12.2011 21:16, schrieb creatura85:
>
> jony127;2419635 Wrote:
>> …
> openJDK is installed by default and should work but if you have issues
> remove it and install it as jony127 suggested.
>
>
The OP tells us that the system in use already has the sun/oracle
version installed and asks if it is better to use openjdk not the other
way around.

hcvv · December 18, 2011, 10:32pm

You can have installed both and make one the default with update-alternatives. That means that most applications will use the default you have set and applications that explicitly want the other one are also happy. See

man update-alternatives

lenwolf · December 19, 2011, 9:00am

Hi, that only works if you install the Oracle (formerly sun) java from the OpenSUSE repos. AFAIK, this will no longer be possible for java 7, since Oracle changed the license (but I may be wrong there).

You can always get the sun JDK from Oracle’s website and install it. This will generally install into /usr/java/latest (which is a link to the real install dir).

If you later use config-alternatives for java, the sun java won’t be listed there and it won’t work, since the installer for the sun jdk will put direct links into the /bin irectory.

I generally delete these links (so that those in /etc/alternatives work and I made a small script to use the sun jdlk ::



ln -sf /usr/java/latest/bin/javac /etc/alternatives/javac
ln -sf /usr/java/latest/bin/javah /etc/alternatives/javah
ln -sf /usr/java/latest/bin/javaws /etc/alternatives/javaws
ln -sf /usr/java/latest/bin/javap /etc/alternatives/javap
ln -sf /usr/java/latest/bin/javadoc /etc/alternatives/javadoc
ln -sf /usr/java/latest/bin/jar /etc/alternatives/jar
ln -sf /usr/java/latest/bin/java /etc/alternatives/java

that reinstates the sun jdk if I want it.

HTH

Lenwolf

hcvv · December 19, 2011, 9:46am

Hm, yes, my info might be out of date. Thanks for this very usefull addition.
BTW it is update-alternatives, not config-alternatives IIRC (but I have allways problems to remember the name of it ).

lenwolf · December 19, 2011, 11:43am

Hi,

you’re right, of course!

Lenwolf

jony127 · December 19, 2011, 8:29pm

The problem I’ve read is that a serious bug in java6, and that the license change can not publish updates for the distributions.

martin_helm · December 19, 2011, 8:49pm

Am 19.12.2011 20:36, schrieb jony127:
>
> The problem I’ve read is that a serious bug in java6, and that the
> license change can not publish updates for the distributions.
>
You have to check in which exact version of java 6 this bug exists and
in which version it is fixed and then compare it to the version you have.


java -version

the build number is the important information here.

lenwolf · December 20, 2011, 7:08am

Hi,

Are you sure that isn’t java 7 you’re talking about?
If so, then the latest version of the Oracle jdk fixed that big AFAIK.

HTH

Lenwolf

user · December 20, 2011, 8:34pm

lenwolf wrote:

>
> hcvv;2419771 Wrote:
>> You can have installed both and make one the default with
>> -update-alternatives-. That means that most applications will use the
>> default you have set and applications that explicitly want the other one
>> are also happy.
>
> Hi, that only works if you install the Oracle (formerly sun) java from
> the OpenSUSE repos. AFAIK, this will no longer be possible for java 7,
> since Oracle changed the license (but I may be wrong there).
>
> You can always get the sun JDK from Oracle’s website and install it.
> This will generally install into /usr/java/latest (which is a link to
> the real install dir).
>
> If you later use config-alternatives for java, the sun java won’t be
> listed there and it won’t work, since the installer for the sun jdk will
> put direct links into the /bin irectory.
>
> I generally delete these links (so that those in /etc/alternatives work
> and I made a small script to use the sun jdlk ::
>
>
> Code:
> --------------------
>
>
> ln -sf /usr/java/latest/bin/javac /etc/alternatives/javac
> ln -sf /usr/java/latest/bin/javah /etc/alternatives/javah
> ln -sf /usr/java/latest/bin/javaws /etc/alternatives/javaws
> ln -sf /usr/java/latest/bin/javap /etc/alternatives/javap
> ln -sf /usr/java/latest/bin/javadoc /etc/alternatives/javadoc
> ln -sf /usr/java/latest/bin/jar /etc/alternatives/jar
> ln -sf /usr/java/latest/bin/java /etc/alternatives/java
>
> --------------------
>
>
> that reinstates the sun jdk if I want it.
>
Thanks for that info.
I use OpenSuse 12.1 and jdk 1.7 from Oracle because I also use NetBeans.7

With your script I now have java 1.7 everywhere inside and outside NetBeans
and it is good news.

But now OpenOffice shouts on starting that it finds a wrong jre.
The funny thing is that OpenOffice is shouting but apparently working
properly. Open Office still opens MYSQL databases and it is possible to
modify data from there.

Yvon
http://perso.numericable.fr/vertgalant/

lenwolf · December 20, 2011, 9:14pm

Hi,

in OO or LO goto tools/options and in the first tab look for the java entry. There you can either select NOT to have java at all, or else indicate the jvm you want to use.

HTH

Lenwolf

which version of java to use?

But now OpenOffice shouts on starting that it finds a wrong jre. The funny thing is that OpenOffice is shouting but apparently working properly. Open Office still opens MYSQL databases and it is possible to modify data from there.

But now OpenOffice shouts on starting that it finds a wrong jre.
The funny thing is that OpenOffice is shouting but apparently working
properly. Open Office still opens MYSQL databases and it is possible to
modify data from there.