Archives For openjdk

OpenJDK Java 8

OpenJDK Java 8 has been made into official Ubuntu repositories for 14.10 Utopic and higher. For Ubuntu 14.04, Ubuntu 12.04, and Linux Mint 17 users here’s how to install it from PPA.

OpenJDK 8 was released in March 2014. It’s available in Ubuntu Software Center for Ubuntu 14.10 and Ubuntu 15.04. Someone has reported in launchpad asking for packaging openjdk-8 in Ubuntu 14.04, but no luck so far.

As a workaround, you can install OpenJDK 8 from a PPA repository:

1. Open terminal from the Dash or by pressing Ctrl+Alt+T. When it opens, run the command below to add PPA:

sudo add-apt-repository ppa:openjdk-r/ppa


Type in user password when it asks and hit Enter to continue.

2. After that, update system package cache and install OpenJDK 8:

sudo apt-get update 

sudo apt-get install openjdk-8-jdk

3. If you have more than one Java versions installed on your system. Run below command set the default Java:

sudo update-alternatives --config java

Type in a number to select a Java version.

set default java version

And set default Java Compiler by running:

sudo update-alternatives --config javac

4. Finally check out current Java version by running:

java -version

It outputs something like this:

openjdk version "1.8.0_01-internal"
OpenJDK Runtime Environment (build 1.8.0_01-internal-b04)
OpenJDK 64-Bit Server VM (build 25.40-b08, mixed mode)

How to install Aleks Plugin on Ubuntu 13.04

Last updated: July 15, 2013

This simple and brief tutorial is going to show you how to install Aleks Plugin for educational site on Ubuntu Linux.

Aleks does not offically support ubuntu, but you can manually install the plugin for your web browser to make it work.

Before getting started, you need to install Oracle Java 7 on Ubuntu(Not Open JDK).

Then click below link to download manually the plug-in on Linux for Netscape, or Firefox:


Then open terminal by pressing Ctrl+Alt+T:

Open Terminal to run commands

Run command to cp downloaded package to Java VM lib/ext directory:

sudo cp aleksPack10.jar /usr/lib/jvm/java-7-oracle/jre/lib/ext/

Now restart your Firefox and visit Aleks website again.