How to Install Oracle JDK 7 on Ubuntu 15.10 Wily 32-64bit Linux+GNU Easy Visual-Guide

September 30, 2015 | By the+gnu+linux+evangelist.

Installing Oracle JDK 7 on Ubuntu 15.10 Wily Linux

Hi! The Tutorial shows you Step-by-Step How to Install and Getting-Started with the Oracle-Sun Official Java SE JDK 7 for Ubuntu 15.10 Wily Werewolf GNU/Linux Desktop/Server.

To SetUp Oracle JDK you will need to Use the update-alternatives Tool to Update your System Java to 1.7 JDK.

To the How to Download and Install Oracle JDK 8+ on Ubuntu 15.10 Wily Bottom there is a Link for Quick Start with Java JDK 7 Development and also to Install the Latest Eclipse Java IDE 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 15.10 Wily are Expressly Essentials to Give Focus Only to the Essentials Instructions and Commands and Make the Tut Easier to Understand ;)

Install Oracle JDK 7 on Ubuntu 15.10 Wily - Featured

Open a Shell Terminal emulator session
Ctrl+Alt+t on Desktop
(Press “Enter” to Execute Commands).
Download Oracle Java SE JDK for Linux.

Oracle JDK i586/x8664 tar.gz

Select Oracle JDK 7 for Linux
Double-Click on Archive and Extract into /tmp
Or from Shell:
```
tar xvzf ~/Downloads/jdk-7*.tar.gz -C /tmp/
```
Relocate Oracle JDK 7
Login as the SuperUser
```
sudo su
```
If Got “User is Not in Sudoers file” then see: How to Enable sudo
To Make a jvm Directory Only if Not already there
(You can directly copy & paste the commands into the terminal)
```
if [ ! -d "/usr/lib/jvm" ]; then mkdir /usr/lib/jvm; fi
```
Set the root superUser as owner
```
sudo chown -R root:root /tmp/jdk1.7*
```
Then to shift the Oracle JDK 7 contents
```
mv /tmp/jdk1.7* /usr/lib/jvm/
```

Installing Oracle Java JDK 7

update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7*/bin/java 1065

update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7*/bin/javac 1065

update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.7*/bin/jar 1065

update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.7*/bin/javaws 1065

Checking or Setting the System Java Version in Use
with

update-alternatives --config java

And for the Java Compiler instead:

sudo update-alternatives --config javac

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

exit

Setting JAVA_HOME User Environment Variable (Optional).
```
su [myUserName]
```
Or simply:
```
exit
```
And Edit the Bash environment Configuration file
```
nano $HOME/.bashrc
```
Append:
```
export JAVA_HOME=/usr/lib/jvm/jdk1.7[uX]
```
Replace the [uX] Looking for the Installed Java 7 Version with:
```
ls /usr/lib/jvm/
```
Ctr+x to Save & Exit from nano Editor :)
Load New Bash Config:
```
bash
```
Testing New Java JDK 7 Installation:
```
java -version
```
Getting-Started with Java Development.

Getting-Started Quickly with JDK

How-to
Getting-Started Quickly with Java JDK Development

How to Install Eclipse for Java Developers on Ubuntu:
The Linked Guide Includes Tutorials for Installing Latest Eclipse Java on Ubuntu.

Now Thanks to Oracle-Sun Corporation you are able to Successfully Start with Java JDK Use & Development.