A question about installing JDK/Java with yum
 

Hi,

As I list the available JDK with yum I got followings:
My questions:
1.
Can I install all these?

If yes, how can I find out where are these (under which dir) installed?

2.
How can I set the JAVA_HOME?

3.
I can also install the Java manually such like download the zip und unpack it. What's the ad and disadvantage using yum or not?



Thomas

Hi,

You'll only need the most recent one...so

...ought to do it.

in the console type:

And in the corresponcing rc, enter that line to persist it tru the next startup...

Luck

Thor

If I want several version of Java?


Yes. But before I set the JAVA_HOME, I have to know where the Java installed, right?

No problem having 2 .. 4 versions. And don't set any "JAVA_HOME".

Use the "Redhat method" : The alternatives "version switcher".

1) su
2) /sbin/alternatives/ --config java


And if a new version has not been automatically added to /etc/alternatives,
a command like this will do :
/usr/sbin/alternatives --install /usr/bin/java java /usr/java/jre1.6.0/bin/java 20000
or /usr/sbin/alternatives --install /usr/bin/java java /usr/java/jdk1.6.0_26/bin/java 2
http://www.if-not-true-then-false.co...-red-hat-rhel/

The location etc. can be found with : ls /usr/java

.

Hi,

In our case we use different JDK versions at the same time by different user. That menas the version switcher is not suitable in this case.

Different versions for different users
 

IN that case: you might -- set the JAVA_HOME on the users profile, .bash_profile, or .bashrc (or as appropriate depending upon their shell) and add ${JAVA_HOME}/bin to the PATH for that user (in the same file).