How to Install JDK 8

1. Download JDK 8

   • Go to the following link.

2. Once the file is downloaded, navigate to the file location and unzip it using the following command:

unzip jdk8.zip

• Switch to superuser (it will prompt for the password):

sudo su

• Move the jdk8 folder to /usr/local/:

mv jdk8 /usr/local/

• Grant permissions to the jdk8 directory:

chmod -R 777 /usr/local/jdk8

• Set the environment variable to point to the jdk8 directory:

export JAVA_HOME=/usr/local/jdk8

• Update the repositories

sudo apt update 

or alternatively:

sudo apt-get update

3. Install JDK 8

sudo apt-get install openjdk-8-jdk

• To check the version

java -version

• If the correct Java version is not in use, use the alternatives command to change it:

i. Register the location where the JDK 8 directory was moved:

sudo update-alternatives --install /usr/bin/java java /usr/local/jdk8/bin/java 1

ii. Change the path:

sudo update-alternatives --set java /usr/local/jdk8/bin/java

Installation Completed!