How to Install Oracle JDK 8 on Ubuntu 12.04 Precise LTS Linux Easy Guide

March 15, 2014 | By the+gnu+linux+evangelist.

Install Oracle JDK 8 on Ubuntu 12.04 Precise

The Guide shows you in Easy-Steps How to Install Oracle-Sun Java SE JDK 8 i586/x8664 for Ubuntu 12.04 Precise Pangolin LTS desktop/server.

To SetUp Oracle JDK in you may need to make use of the update-alternatives Tool to Update your System Java.

Some Java 8 Features:

LAMBDA Expressions Programming
The Stream API
The Nashorn Javascript Engine

To the How to Download and Install Oracle JDK 8 on Ubuntu 12.04 Precise Bottom there is a Link for Quick Start with Java JDK 8 Development and also to Install the Java Web-Server Tomcat 7 for Ubuntu.

Moreover, to Make the Process Easier to Visualize the Post Includes the Basic Screenshots of the Steps Involved.

The Contents and Details of How to Download and Install Oracle JDK 8 on Ubuntu 12.04 Precise are expressly minimal to focus only on the essential instructions and commands and make the tut easier to understand ;)

Install Oracle JDK 8 on Ubuntu 12.04 Precise - Featured

Download Oracle Java SE JDK8 for Linux.

Oracle JDK8 i586/x8664 tar.gz

Oracle Jdk8

Double-Click on the tar.gz Archive and Extract into
/tmp

tar xvzf ~/Downloads/jdk-8*.tar.gz -C /tmp/

Install Oracle JDK 8 on Ubuntu 12.04 Precise - Java JDK 8 tar.gz Extraction Path
Or from Shell:

tar xvfz jdk1.8*.tar.gz -C /tmp/

Open a Terminal Window
(Press “Enter” to Execute Commands)
Relocate JDK 8
```
sudo su
```
If Got “User is Not in Sudoers file” then see: How to Enable sudo
Make a jvm Directory if Not already there with
```
if [ ! -d "/usr/lib/jvm" ]; then mkdir /usr/lib/jvm; fi
```
Set the root superUser as owner
```
sudo chown -R root:root /tmp/jdk1.8*
```
Reiterate the Execution Permission over the Java binaries
```
chmod -R +x /tmp/jdk1.8*/bin
```
Finally, Shift the Java contents with
```
mv /tmp/jdk1.8* /usr/lib/jvm/
```

Installing Oracle Java JDK 8
You can directly Copy & Paste the Commands into Terminal..

update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.8*/bin/java 1065

update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.8*/bin/javac 1065

update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.8*/bin/jar 1065

update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.8*/bin/javaws 1065

Checking or Setting the System Java Version in Use with

update-alternatives --config java

To Switch of Java Version Just Enter the Selection Number on First, Column. :)

Lastly to Exit from the Super-User session:

exit

Setting JAVA_HOME User Environment Variable (Optional).
```
su [myUserName]
```
Or simply:
```
exit
```
```
su [myUserName]
```
Or simply:
```
exit
```
And Edit the Bash environment Configuration file
```
nano $HOME/.bashrc
```
Append:
```
export JAVA_HOME=/usr/lib/jvm/jdk1.8[uX]
```
Replace the [uX] Looking for the Installed Java 8 Version with:
```
ls /usr/lib/jvm/
```
Ctr+x to Save & Exit from nano Editor :)
Load New Bash Config:
```
bash
```
Test New Java JDK 8 Installation.
```
java -version
```
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