Oracle Sun Java 7 installation on Ubuntu 12.04

Posted: July 9, 2012 in Coding, Java, Linux, Projects, System Configuration, Ubuntu

Back again after a long pause. I was in process of installation of Netbeans 7.1.2 yesterday (about half an hour back before this post :). Its 12:07 in the midnight when I’m keying in this post).

Every time I tried to run the Netbeans installer, I came across the warning message stating that the JDK was not detected. I exit the installation wizard, made a couple of restarts after running the apt-get updates in the terminal. However, the installer fails to detect the JDK installed in the system.

Note: The JDK installed in in Ubuntu 12.04 by default is OpenJDK.

Then finally concluded that will go ahead installing the tried/tested/trusted Oracle-java JDK. There begins the problems. Initially downloaded an rpm package from the Oracle-java site. Extracted the files and copied/pasted them into usr/lib/jvm folder. The NetBeans installer still seemed to be reluctant in detecting the JDK. (Not sure if I was right with this approach).

Then tried converting it to .deb package using alien and still the package failed to dpkg. :(. After being done with all the those manual extractions, I was soon on a look out for an installer package or a method to install it from the terminal with auto-download.

It was then that I came across a couple of sites suggesting to add the repositories and then install the package which too began failing.

Then came this QA site which turned out to be a saver.

It initially asks us to clean up the junk and begin with a fresh installation and this was successful after hours of R&D.

sudo rm /var/lib/dpkg/info/oracle-java7-installer*
sudo apt-get purge oracle-java7-installer*
sudo rm /etc/apt/sources.list.d/*java*
sudo apt-get update
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

Hope this helps anybody with Ubuntu 12.04 to get over with the issue with installation of Oracle Java 7 and in turn set up IDE's such as NetBeans. I was able to proceed with the installation of NetBeans successfully thereafter.

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Comments
  1. completereality says:

    Reblogged this on Simply Straightforward and commented:
    Since the latest java is important for both security and functioning, it is very handy.

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