Trying to install JDK

Question

I'm trying to install JDK on ubuntu 14.04 LTS. I downloaded it from oracle website. Than I extracted it and moved in usr/lib/java. It says java doesn't exist but it does.

I use this video https://www.youtube.com/watch?v=NZB3Iy7Lve4

Answer 1

To install Openjdk 6:

sudo apt-get update && sudo apt-get install openjdk-6*

To install Openjdk 7:

sudo apt-get update && sudo apt-get install openjdk-7*

NOTE: If you already have the downloaded .tar.gz file, something similar to this - jdk-8u66-linux-x64.tar.gz then before proceeding any further copy it to /var/cache/oracle-jdk8-installer. Create the necessary folders if required (root may be necessary) and also change 8 in /var/cache/oracle-jdk8-installer with the correct version.

To install Oracle Java 7:

sudo add-apt-repository -y ppa:webupd8team/java && sudo apt-get update && sudo apt-get install oracle-java7-installer

To install Oracle Java 8:

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

To install Oracle Java 9 (not recommended):

sudo add-apt-repository -y ppa:webupd8team/java && sudo apt-get update && sudo apt-get install oracle-java9-installer