Linux

linux_newbee · 03-21-2006, 01:00 AM

How do i know where is java installed on my PC ?

java -version is working for me ...

implying that i have installed it somewhere, but i am unable to locate java/bin now

Thanks in advance

Baldrick65 · 03-21-2006, 01:45 AM

Try typing this in a console

Code:

whereis java

it should print out something like this

Code:

baldrick@blackadder:~> whereis java
java: /usr/bin/java /etc/java /usr/lib/java /usr/include/java /usr/share/java /usr/share/man/man1/java.1.gz

That should give you a starting point.

Baldrick

linux_newbee · 03-21-2006, 05:54 AM

whereis java
java: /usr/bin/java /etc/java /usr/lib/java /usr/share/java

However i couldnt find a proper java installation ( as in a folder which contained java/bin in any of these mentioned locations)

Anything else that could help me??

java -version
java version "1.4.2"
gij (GNU libgcj) version 4.0.2 20051125 (Red Hat 4.0.2-8)

Seagull · 03-21-2006, 06:14 AM

Try looking at /usr/lib/java - it's probably a simlink. Follow the chain of symlinks to the end. There you should find your 'actual' installation complete with bin, include and lib directories.

Of course it may be completely different on your distro.;-)

linux_newbee · 03-28-2006, 08:22 PM

This is what i found in /usr/lib.

Code:

[linuxbee@localhost ~]$ cd /usr/lib
[linuxbee@localhost lib]$ ls -lrt jav*
java-ext:
total 0

java-1.5.0:
total 0

java-1.4.2:
total 0

java-1.4.1:
total 0

java-1.4.0:
total 0

java:
total 0

Anything else that i should try

ntubski · 03-29-2006, 01:05 AM

If you've run updatedb, try

Code:

locate bin/java

One of them has to be it

jlo_sandog · 03-29-2006, 02:15 AM

fedora comes with java-gcj. Mine is in /usr/lib/jvm folder. If you want the sun version, then you have to download it from the sun website.

linux_newbee · 03-29-2006, 10:19 PM

Quote:

Originally Posted by jlo_sandog

fedora comes with java-gcj. Mine is in /usr/lib/jvm folder.

That helped !!!

Now moving on to my main problem... I am trying to install an application on my Linux box, but while trying to do so , the following error msg is displayed
"No Java virtual machine could be found from your PATH
environment variable."
I understand that this is because some Path Variables related to Java have to be set.

Can someone tell me what variables have to be set exactly ?

ntubski · 03-29-2006, 11:10 PM

basically /usr/lib/jvm/bin/ should be in your PATH:

Code:

PATH="$PATH:/usr/lib/jvm/bin/"

If that works then you add that line to your .bashrc file so it gets set in every shell

linux_newbee · 03-30-2006, 08:36 PM

Tried this... but i am still getting the same error.

Are there any other java-related environment variables to be set ?

UltimaGuy · 03-30-2006, 11:07 PM

What application did you try to install ? Because some apps like Azureus require you to have Sun's Java and wont install with GCJ.

ntubski · 03-30-2006, 11:12 PM

Are you starting up the installation from GUI? In that case it setting variables in a shell won't affect it. Otherwise I'm not really sure, /usr/lib/jvm/bin/ has all the stuff(java, javac, appletviewer etc)? Maybe it expects a folder named java? or jre?

jlo_sandog · 03-31-2006, 02:17 AM

java is already in the path on fedora. However this is java-gcj not java sun and it is very limited. You need java from sun.

dr_te_z · 03-31-2006, 05:32 AM

Quote:

Originally Posted by Baldrick65

Try typing this in a console

Code:

whereis java

Or (even better, you'll the java actually being used)

Code:

which java

linux_newbee · 04-05-2006, 06:13 AM

Quote:

Originally Posted by jlo_sandog

java is already in the path on fedora. However this is java-gcj not java sun and it is very limited. You need java from sun.

Should i uninstall java-gcj before installing sun java? Or to put the question in a better way.... is it ok to unistall java-gcj .. i mean will it affect any other dependencies which come with the other apps that come along with FC ?