What I leanrn today: April 2016

Type in the following commands, then hit Enter after each:

sudo add-apt-repository ppa:noobslab/apps        
sudo apt-get update        
sudo apt-get install xdman

Or you can download and install it:

Linux 32 bit	TAR+XZ archive (12 MB)
Linux 64 bit	TAR+XZ archive (14 MB)

First install java:

You can use WebUpd8 PPA (this will download the required files from Oracle and install JDK 8):

sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

step 1: Type in the terminal

sudo gedit /etc/environment

step 2: Then add these lines

JAVA_HOME=/usr/lib/jvm/java-8-oracle
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH

Then save the file.

To check, have you installed or not:
Goto terminal and type following commands:

java -version

You will see:

Then you are done.