How to get/set Java version, JAVA_HOME and Classpath
I need step-by-step instructions on how to
1. check JAVA version,
2. set up the JAVA_HOME and
3. CLASSPATH variables
I had installed
1. NetbeansIDE 6.7.1 from Software Center
2. MySQL from command sudo apt-get install mysql-server
3. libmysql-java from synaptic package manager
1. Partition 1, 3.0 GB Swap Space, /dev/sda1
2. Partition 2, 6.0 GB Filesystem, /dev/sda2 mount at /, Bootable
3. Partition 3, Ext4, /dev/sda3 mount at /home
4. Partition 4, /dev/sda4, Extended (Drive A, Drive B and Drive C)
Thanks & Regards
I found the following to be helpful when setting up java on Fedora Core 12:
The following command will print the version of java you are currently using.
> java -version
The following command will print the home directory for the java executables for the version of java you are running. I assume that this is what you will want to correspond to JAVA_HOME. I'm not a developer so I am not 100% sure on this. This is typically /usr/bin/java.
> which java
I think it might be best practice to create a sym link between your current version and the more generic path. For example:
>ln -s /usr/java/jre1.x.x.x /usr/java/jre
This saved me a bit of aggravation when I upgraded java. The only item I had to change was the first sym link. My PATH variable etc. is preserved.
The following sym link should also be in place to direct you to the correct executables:
>ln -s /usr/java/jre/bin/java /usr/bin/java
In the event that "/usr/bin" is *not* in the PATH variable (unlikely), the following command may be used to add it.
>PATH=/usr/bin:$PATH then export PATH
My understanding is that this will only stay put for the duration of the session. Editing the PATH variable as it exists in /etc/profile is a more permanent method.
I'm not sure how to set the class path, but I hope the above helps.
No need to reply this post I had solved my problem.
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