I currently have the jre 7 and need to upgrade to 8 on ubuntu 1404. I need only JRE upgraded to 8 for demo purpose. Could you please guide me on this?
java version "1.7.0_79" OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.14.04.1) OpenJDK Server VM (build 24.79-b02, mixed mode) 1 Answer
OpenJDK 8 for Trusty isn't available in the official Ubuntu repositories.
As a workaround, you can install OpenJDK 8 from a PPA.
Open a terminal and execute:
sudo apt-add-repository ppa:openjdk-r/ppa sudo apt-get update sudo apt-get install openjdk-8-jdk Or if you only need the JRE
sudo apt-get install openjdk-8-jre It is usual that several major versions are installed in parallel.
To switch between Java 7 and Java 8 use this command:
sudo update-alternatives --config java 
