Need help in installation of JAVA & Netbeans !!

[Ric Moore]

On 01/19/2012 02:34 AM, Navdeep Singh Sidhu wrote:
> hello
>
> Recently i reinstalled ubuntu on my laptop&  when i try to install netbeans
> on it, it's installer says compatible JDK not found but i had installed JDK
> 1.7.0_02 on it&  i followed these commands
>
> root at S13:/home/nika/Downloads# update-alternatives --config javac
> update-alternatives: error: no alternatives for javac.
> root at S13:/home/nika/Downloads# update-alternatives --install /usr/bin/javac
> javac /usr/lib/jvm/jdk1.7.0_02/bin/javac 1
> update-alternatives: using /usr/lib/jvm/jdk1.7.0_02/bin/javac to provide
> /usr/bin/javac (javac) in auto mode.
>
> but when i  tried javac command it gives following error
>
> root at S13:/home/nika/Downloads# javac
> bash: /usr/bin/javac: Permission denied
>
> so i remove it using
>
> root at S13:/home/nika/Downloads# update-alternatives --remove-all javac
>
>
> can i get some help?

I would be of better help if my other harddrive, with ALL of my 
accumlated links weren't in repose on that dead parrot. So, just google 
on "install java 7 linux ubuntu" and you'll find some good links to show 
you exactly how. They will provide a script that will make all of the 
links for you in alternatives, so that every possible java binary is 
found and updated for you. It's worth it, as java 7 seems to be much 
more multi-core aware.

Huh, I just googled and it seems someone has a ppa
http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html

that provides an app that downloads and installs Oracle Java 7 for you 
and installs it. This would beat doing by hand like I had to. Give that 
a whirl! Otherwise I found the site I used before:
http://www.webupd8.org/2011/09/how-to-install-oracle-java-7-jdk-in.html

I'd try the ppa first. Enjoy! Hope this helps. IMHO, Java 7 is the way 
to go. :) Ric