In this article, We are going to perform How to Download and Install Oracle JAVA 8 on Ubuntu 18.04/16.04 LTS Manually.
Java is a set of software and specifications developed at Sun Microsystems. There are two tyes of Java Platforms are JDK (Java Development Kit) and JRE (Java Runtime Environment). Both are helpful for deploying applications on servers and debugging, JVM monitoring,developing.
Java 8 Features:
Java 8 provides following features,
- ForEach() method
- Functional interfaces
- Base64 Encode Decode
- Parallel array sorting
- Parallel Array Sorting
- Type and Repating Annotations
- java.lang and java.util Packages
To know more detailed features go through this link.
- Ubuntu Server 16.04/18.04 LTS
- SSH access with sudo privileges
To check Ubuntu version:
$ uname -a
$ cat /etc/os-release
$ cat /etc/os-release
VERSION="16.04.5 LTS (Xenial Xerus)"
PRETTY_NAME="Ubuntu 16.04.5 LTS"
Follow the below steps to Install Oracle Java 8 on Ubuntu Manually using command line.
Step 1: Download Oracle Java 8
Generally Oracle will not allow to download directly without accepting their licences. We have to create one account in Oracle java website by your personal or official mail. After accepting licence download the application from browser to local machine.
This link takes you to the Oracle home website Oracel Java SRE.
Once you opened above link goto “JAVA SE Development Kit 8u221” section, click on “Accept License Agreement” Radio button and download “jdk-8u211-linux-x64.tar.gz” setup for ubuntu.
After downloading into local machine,using scp/SFTP/FTP transfer the file from local machine to Ubuntu server.
Step 2: Copy downloaded Setup and Extract
Run below command to run as sudo user:
# sudo su
Create a directory:
# mkdir /opt/jdk
Copy the tar file from the directory copied from local machine to server to /opt/jdk folder and execute below command:
# cp -rf /home/sivasai/jdk-8u211-linux-x64.tar.gz /opt/jdk/
# cd /opt/jdk/
# tar -zxf jdk-8u211-linux-x64.tar.gz
Now unarchived the file and check the content by long-list:
Step 3: Install Oracle Java 8 on ubuntu with Alternatives
# update-alternatives --install /usr/bin/java java /opt/jdk/jdk1.8.0_211/bin/java 100
update-alternatives: using /opt/jdk/jdk1.8.0_211/bin/java to provide /usr/bin/java (java) in auto mode
Note : Its not particularly o/p if you have installed open jdk before
Step 4: Verify Update Alternatives
# update-alternatives --display java
java - auto mode link best version is /opt/jdk/jdk1.8.0_211/bin/java link currently points to /opt/jdk/jdk1.8.0_211/bin/java link java is /usr/bin/java /opt/jdk/jdk1.8.0_211/bin/java - priority 100 /opt/jdk/jdk1.8.0_211/bin/javac - priority 100
# update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ * 0 /opt/jdk/jdk1.8.0_211/bin/java 100 auto mode 1 /opt/jdk/jdk1.8.0_211/bin/java 100 manual mode 2 /opt/jdk/jdk1.8.0_211/bin/javac 100 manual mode Press <enter> to keep the current choice[*], or type selection number:
Step 5: Setting the JAVA_HOME and JRE_HOME Environment Variables
# vi /etc/environment
# source /etc/environment
# echo $JAVA_HOME
# apt-get update
Step 6: Verify Java Version
# java -version
java version "1.8.0_211" Java(TM) SE Runtime Environment (build 1.8.0_211-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.211-b12, mixed mode)
In this article, We have downloaded Oracle Java 8 from official site, installed using command line, configured JAVA_HOME and JRE_HOME, verified installed version.