Step 1- Open the terminal window by CTRL+ALT+T. Install the default JDK by the following command

sudo apt-get install default-jdk

and press enter.

Wait for the file to completely install, when it shows done then move to the next step.

Step 2- Now install the default JRE file using terminal window by the following command

sudo apt-get install default-jre

and wait for the file to install.

Step 3- Now download the JDK file from the following link:

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

Step 4- Download the JRE file from the following link:

http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html

Step 5- After the file is downloaded in the download folder open the terminal window and run:

sudo nautilus

It will ask for the administration permission and you have to enter your system password in it, as you’ll press enter a new window will open.

Step 6- Now open Computer->Home->Downloads->Your downloaded JDK file: “jdk-8u131-linux-x64.tar.gz”->right click on this file->Open this file with Archive Manager->Extract the file in Computers/usr/ java

Repeat the same steps to extract JRE file.

Computer->Home->Downloads->Your downloaded JRE file: “jre-8u131-linux-x64.tar.gz”->right click on this file->Open this file with Archive Manager->Extract the file in Computers/usr/ java

Step 7- Once the file is extracted open the Terminal Window by using Ctrl+Alt+T.

Step 8- Open the terminal and run the following command :

sudo apt-get update

and press Enter, it will ask for the system password, enter the password and wait for sometime. It will update all the latest packages installed on your system.

Step-9 After the package lists reading is done, double-check your directories at this point, you should have an uncompressed binary directory in /usr//java for the Java JDK/JRE,

Type the following command to change the directory:

cd /usr/java

Type the following command to view the list of folders inside the directory:

ls

Step-10 Once the directories are checked now it’s time to install the JDK file. Type the following command in the terminal window:

sudo gedit /etc/environment

Then it will ask you to enter your system password, as you input the password press enter.

You will see an editor will open:

Step 11- Type the following commands in the editor:

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/java/jdk1.8.0_131/bin"

JAVA_HOME="/usr/java/jdk1.8.0_131"

export JRE_HOME=/usr/java/jre1.8.0_131

export PATH=$PATH:$HOME/bin:JAVA_HOME:JRE_HOME

Save the file by pressing CTRL+S and close the window.

Step-12 Reload the file by typing the following command: 

source /etc/environment

Step 13- Now type:

sudo gedit ~/.bashrc

and enter the following path in the editor at the bottom of the page and save the file by CTRL+S or by pressing SAVE button on the top right corner and close the editor window

Path to enter in the file:

export JAVA_HOME="/usr/java/jdk1.8.0_131"

export JRE_HOME=/usr/java/jre1.8.0_131

export PATH=$PATH:$HOME/bin:JAVA_HOME:JRE_HOME

Step 14- Now type the following command to reload the file:

source ~/.bashrc

Check the expected results by typing following commands:

echo $JAVA_HOME
echo $JRE_HOME

It must display  “//usr/java/jdk1.8.0_131” and “/usr/java/jre1.8.0_131” respectively.

Step 15- Now smile, your JDK and JRE files are now installed in your system.

Check your files by typing  

java -version

in the terminal window.

If you get this as a result:

“java version “1.8.0_131”

Java(TM) SE Runtime Environment (build 1.8.0_131-b11)

Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)“

then you have got all right and your files are successfully installed.

*****************************THANK YOU ***********************