[FC6] Firefox + Sun Java

[M. Lewis]

I'm not getting java to work. I followed the directions on Stanton 
Finley's page (substituting versions where applicable). However the java 
refuses to run for some reason.

[root@moe ~]# alternatives --config java

There are 2 programs which provide 'java'.

   Selection    Command
-----------------------------------------------
*  1           /usr/lib/jvm/jre-1.4.2-gcj/bin/java
  + 2           /opt/jre1.5.0_09/bin/java

Enter to keep the current selection[+], or type selection number: 2


[root@moe ~]# alternatives --display java
java - status is manual.
  link currently points to /opt/jre1.5.0_09/bin/java
/usr/lib/jvm/jre-1.4.2-gcj/bin/java - priority 1420
  slave keytool: /usr/lib/jvm/jre-1.4.2-gcj/bin/keytool
  slave rmiregistry: /usr/lib/jvm/jre-1.4.2-gcj/bin/rmiregistry
  slave jre_exports: /usr/lib/jvm-exports/jre-1.4.2-gcj
  slave jre: /usr/lib/jvm/jre-1.4.2-gcj
/opt/jre1.5.0_09/bin/java - priority 2
  slave keytool: (null)
  slave rmiregistry: (null)
  slave jre_exports: (null)
  slave jre: (null)
Current `best' version is /usr/lib/jvm/jre-1.4.2-gcj/bin/java.


Any thoughts as to what I'm missing?

Thanks,
Mike


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[Ed Landaveri]

Mike,
This is how I did it the last 6 to 7 times and always work:
1. Download jre-1_5_0_09-linux-i586.bin
2. su-->pwd-->mv jre-1_5_0_09-linux-i586.bin to /usr/local
3. chmod a+x jre-1_5_0_09-linux-i586.bin
4. verify permissions: ls -l
5. ./jre-1_5_0_09-linux-i586.bin
6. Do you agree? Yes.-->Done
7. It's installed under: /usr/local/jre1.5.0_09
8. cd /usr/lib/firefox-1.5.0.7/plugins/
9. ln -s /usr/local/jre1.5.0_09/plugin/i386/ns7/libjavaplugin_oji.so .
10.Edit > Preferences. Under Advanced category > Select Enable Java

Hope this helps


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[M. Lewis]

Ed Landaveri wrote:
>  Mike,
>  This is how I did it the last 6 to 7 times and always work:
>  1. Download jre-1_5_0_09-linux-i586.bin
>  2. su-->pwd-->mv jre-1_5_0_09-linux-i586.bin to /usr/local
>  3. chmod a+x jre-1_5_0_09-linux-i586.bin
>  4. verify permissions: ls -l
>  5. ./jre-1_5_0_09-linux-i586.bin
>  6. Do you agree? Yes.-->Done
>  7. It's installed under: /usr/local/jre1.5.0_09
>  8. cd /usr/lib/firefox-1.5.0.7/plugins/
>  9. ln -s /usr/local/jre1.5.0_09/plugin/i386/ns7/libjavaplugin_oji.so .
>  10.Edit > Preferences. Under Advanced category > Select Enable Java
>  
>  Hope this helps
>   
Thanks Ed. Yes, I believe these are the exact steps I did. Strange why 
it's not working.

Thanks,
Mike


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[Chong Yu Meng]

On Wed, 2006-11-01 at 21:53 -0500, M. Lewis wrote:
>  I'm not getting java to work. I followed the directions on
> Stanton 
>  Finley's page  
If you are using FC6, there are a couple of annoyances:

1. Stanton Finley's page is an excellent resource, but I believe there
is an inaccuracy in the Java steps. If you had followed his instructions
to the letter, you would have found this:

>  Current `best' version is /usr/lib/jvm/jre-1.4.2-gcj/bin/java.
This is because this command gives Sun's Java the priority of '2' which
is less than the default gcj priority of '1420':

/usr/sbin/alternatives --install /usr/bin/java
java /opt/jre1.5.0_08/bin/java 2

If you want the 'best' version to be Sun Java, then you need to give
priority a higher value, such as '1421' like so:

/usr/sbin/alternatives --install /usr/bin/java
java /opt/jre1.5.0_08/bin/java 1421

For the most part, this is just me being anal-retentive/pedantic, but
there have been reported problems with Eclipse hanging if you set up
Java as described in SF's doc. 

2. The Java plug-in in IBM's J2SDK1.4.2 seems to fail -silently- when I
tried using it in Firefox for FC6. There seemed to be an additional
plug-in, though, a JNI plug-in that exists in the same directory as the
Java plug-in. According to one site, I need to create a symlink for that
to Firefox's plugin directory. I tried that, but no joy.

I went back to Blackdown's Java SDK 1.4.2. This JVM seems slower than
IBM's (not sure about Sun Java because I don't use it for my own
personal reasons), is always a version behind, lacks certain components
such as a SAX parser, but is the most reliable Java I have ever used.
With each new Fedora release, IBM's Java seems to break until the next
service release (SR)

You may want to try a lower version of Sun Java, or try Blackdown's Java
(still 1.4.2). Or if you really want to use Sun Java, you may want to
try adding "export LD_ASSUME_KERNEL=2.4.1". I read somewhere that this
may work -- or not. I'm not sure whether setting this environment
variable may cause your applications to break. I've never used it
personally. 

Regards,
pascal chong