Install JDK in Ubuntu of any version is as follow
step 1:- first of all download JDK from Oracle tar.gz file of jdk .
step 2 :- Open the terminal Ctrl+Alt+T.
step 3:- go to path of where you have download jdk.
By terminal basically if is saved in Download folder by default.
For that you have to type this command in terminal
step 4 :- By $ls command you can see your files in that jdk is there is not that you have not download or you can save in another directory.
Now you have to extract file for that type the command
$ tar -xvf jdk<file name>
like i have jdk-8u31-linux-x64.tar.gz
$ tar -xvf jdk-8u31-linux-x64.tar.gz
step 5 :- Than it will create the folder of your jdk version in that directory
now you have to move that folde in root directory.for that you have to create the folder in the root directory
type the following command
$ sudo mkdir -p /usr/ibjvm/dk<your version of java>
step 6:- folder will create in following path.now you have to move your jdkextract folder in root directory with you create in /usr/lib/jvm/jdk<version>
for that type command
$sudo mv jdk<your version>/* /usr/lib/jvm/jdk<you version>
like :-sudo mv jdk1.8.0_31/* /usr/lib/jvm/jdk1.8.31/
step 7:- it will move your all data and file in extract folder in that directory folder. now you have to SET environment
step 8:- $gedit /ect/environment it will open the window. at the end in the qouts(“”)you have to write semicolon (:)path of you jdk version of bin folder :/usr/lib/jvm/jdk1.8.0_31/bin”
step 9 : now restart your pc than open terminal and type command for check version of java have install properly or not $java -version than its display your version of java