ERROR: cannot start RubyMine. No JDK found. JDK Version? + desktop link

Question

ERROR: cannot start RubyMine. No JDK found. Please validate either RUBYMINE_JDK, JDK_HOME or JAVA_HOME environment variable points to valid JDK installation.

I'm not sure what JDK version number to use to download it?

Also how to create a desktop link in 11.10?

Answer 1

I think using apt-get is easier, see for example this article:

sudo apt-get install openjdk-7-jdk

Answer 2

Turned out that in the end I had to do several things to get java running and thus resolve the issue:

Get Java

Download oracle7 jdk at:
http://www.oracle.com/technetwork/java/javase/downloads/java-se-jdk-7-download-432154.html
e.g. http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-x64.tar.gz

Follow instructions at:
http://www.webupd8.org/2011/09/how-to-install-oracle-java-7-jdk-in.html e.g.

After downloading java (above): Extract the downloaded Oracle Java JDK archive into your home folder and rename the newly created folder to "java-7-oracle".

sudo mv its_name java-7-oracle

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Install Java

cd
sudo mkdir -p  /usr/lib/jvm/ #just in case
sudo mv java-7-oracle/ /usr/lib/jvm/
sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install update-java
sudo update-java  # choose version 1.7 if necessary.

---

Check the Java install

java -version
javac -version

I was then able to start up rubyMine successfully.

---

Create rubyMine shortcut

To create the desktop launcher in Ubuntu 11.10:

Once you've installed rubymine and you have the executable somewhere:

If it's called mine, then create a desktop launcher that runs it
http://www.ubuntugeek.com/how-to-create-desktop-launchers-in-ubuntu-11-10oneiric.html

You'll run (in a terminal window):

gnome-desktop-item-edit ~/Desktop/ --create-new

Indicate where the rubyMine executable is, e.g. use /usr/local/bin/mine as the command to run.

You can then also drag that to the left side toolbar icons area for a icon quick-launcher there.

Note:
If following these instructions and making a quick-launch icon at the end - make sure NOT to delete the desktop icon you created earlier when cleaning up your desktop as this will also remove that quick-launch item (it's a link to it).