Ubuntu Java dev env setup

 

Step 1 – Install Oracle Java 8 on Ubuntu

Run below commands to install Java 8 on Ubuntu:

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

Step 2 – Verify Java Inatallation

 The apt repository also provides package oracle-java8-set-default to set Java 8 as your default Java version. This package will be installed along with Java installation. To make sure run below command.

sudo apt-get install oracle-java8-set-default

Verify installation:

$ java -version
java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)

Step 3 – Setup JAVA_HOME and JRE_HOME Variable

Add following lines into /etc/environment file.

JAVA_HOME="/usr/lib/jvm/java-8-oracle"
export JAVA_HOME
JRE_HOME="/usr/lib/jvm/java-8-oracle/jre"
export JRE_HOME
PATH="$JAVA_HOME/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"

  

Reference:

1. https://tecadmin.net/install-oracle-java-8-ubuntu-via-ppa/

2. https://www.configserverfirewall.com/ubuntu-linux/set-java-home-ubuntu/