FC4 Sun Java Warning

[wtogami]

http://fedora.redhat.com/docs/releas...ata/#id2503640

Fedora Core 4 users are advised not to use the Java RPM provided by Sun. It contains Provides that conflict with names used in packages provided as part of Fedora Core 4. Because of this, Sun Java might disappear from an installed system during package upgrade operations.

Fedora Core 4 users should use either the RPM from jpackage.org or manually install the Sun Java tarball into /opt. Sun Java 1.5+ is recommended for stability purposes.

[Thetargos]

Ok, but which of the RPMs provided by jpackage? I've looked at it, but did not know which to download. Should I get the one for Java 1.5.0 labled as it is from Sun? Or should I get Kafe? or which?

[PeTzZz]

or manually install the Sun Java tarball into /opt.

Is it Linux self-extracting file in the download section of Sun Java page?

[strikeforce]

Yeah the linux self extracting one. However I don't know how to export the path properly since the names if I run java it runs as libgcj I think it is?

[kentiz]

Did anyone get java to work?

[bytesniper]

java works great. there is a link in /usr/bin/java that actually starts java so it needs to be pointed to the correct java installation. the easiest way to do this (to presserve both or all installations of java) is to use alternatives.

if you type alternatives --config java you will see a single entry pointing to something like /usr/lib/jvm/jre-1.4.2-gcj/bin/java.

all you need to do is add the link (path) to the new installation of java from sun

alternatives --install /usr/bin/java java /pathto/sunjava/java 2
(usage is alternatives <link> <name> <path> <priority>)

once you add the new java configuration to alternatives all you need to do is activate, to tell the system this is what should be run as /usr/bin/java:

alternatives --config java
this will give you a menu of java installations. choose the second option (hence, priority 2) and hit enter. now when you type something like java -jar filename.jar it will use the sun java instead of the inlcuded gcj.

note: you can also delete the /usr/bin/java and make a new symbolic link to the java binary of the new java installation, but i do not recommend this.

[PeTzZz]

I managed to get java working now.

Download JRE 5.0 Update 3 here. Note that you have to download the Linux self-extracting file. Then read the instructions how to install it.

After that do as root:

gedit /etc/profile.d/java.sh

and paste this text and save:

#!/bin/sh
JAVA_HOME=/usr/java/jdk1.5.0_03
export JAVA_HOME
JAVA_BIN=$JAVA_HOME/bin
CLASSPATH=$CLASSPATH:$JAVA_HOME:$JAVA_HOME/lib
PATH=$JAVA_BIN:$PATH
export JAVA_BIN CLASSPATH PATH

where /usr/java/jdk1.5.0_03 is the directory you installed it. Now reboot. Maybe log in and log out works also.

To get the firefox plugin to work, make a link of

theinstallationpath/plugin/i386/ns7/libjavaplugin_oji.so

(right click on it in Nautilus and choose Make Link, Nutilus has to be run with root privilegs - you can do it by running nautilus from terminal as root) and move it to /usr/lib/firefox-1.0.4/plugins (note that you have to remove link to prefix in the filename if you made the link with the right click menu).

That's it. Azureus and other java applications should work now.

[bytesniper]

i wrote this to a questions almost identical to this one some time back. its a much better walk through but geared toward getting java to work on a 64bit system and using it as a firefox browser plugin. might help you out.

http://forums.fedoraforum.org/forum/...ad.php?t=55412

[PeTzZz]

bytesniper's method seems to be better. So you may use his method instead of making mentioned /etc/profile.d/java.sh.

[strikeforce]

You are an absoluet champion it worked straight away. Thanks so much for this. I just had to re-arrange where stuff was which is fine.

[xbaxe]

um , im a newb so dont mind me asking ... Whats the difference? I want to play java games on the internet with my FC4 whihc im isntalling right now. Will i be able to play it as it has various Java choices? Can i use sun Java to play that game ( www.runescape.com)

Thanks

xbaxe

[strikeforce]

Yeah as long as you put a symbolic link not your firefox plugins directory to the java plugin. That will mean you have java enabled in your browser.

[smfinley]

http://fedora.redhat.com/docs/releas...ata/#id2503640

Fedora Core 4 users are advised not to use the Java RPM provided by Sun. It contains Provides that conflict with names used in packages provided as part of Fedora Core 4. Because of this, Sun Java might disappear from an installed system during package upgrade operations.

Fedora Core 4 users should use either the RPM from jpackage.org or manually install the Sun Java tarball into /opt. Sun Java 1.5+ is recommended for stability purposes.

See the (entire) Java section at Fedora Core 4 Installation Notes.

[xbaxe]

Yeah as long as you put a symbolic link not your firefox plugins directory to the java plugin. That will mean you have java enabled in your browser.

What do you mean " not your firefox plugins directory " ?

[sc123]

I managed to get java working now.

Download JRE 5.0 Update 3 here. Note that you have to download the Linux self-extracting file. Then read the instructions how to install it.

After that do as root:

gedit /etc/profile.d/java.sh

and paste this text:

#!/bin/sh
JAVA_HOME=/usr/java/jdk1.5.0_03
export JAVA_HOME
JAVA_BIN=$JAVA_HOME/bin
CLASSPATH=$CLASSPATH:$JAVA_HOME:$JAVA_HOME/lib
PATH=$JAVA_BIN:$PATH
export JAVA_BIN CLASSPATH PATH

where /usr/java/jdk1.5.0_03 is the directory you installed it. Now reboot. Maybe log in and log out works also.

To get the firefox plugin to work, make a link of

theinstallationpath/plugin/i386/ns7/libjavaplugin_oji.so

(right click on it in Nautilus and choose Make Link, Nutilus has to be run with root privilegs - you can do it by running nautilus from terminal as root) and move it to /usr/lib/firefox-1.0.4/plugins.

That's it. Azureus and other java applications should work now.

I just wanted to say thanks to Pet for posting this - it worked for me and I was really frustrated!
-SC