How to Install Oracle JDK 7 on Kubuntu 14.04 Trusty LTS Easy Visual-Guide

November 8, 2014 | By the+gnu+linux+evangelist.

Oracle Java JDK 7 Quick Start Kubuntu 14.04 Trusty

The Guide shows you in Easy-Steps How to Install and Getting Started with the Oracle-Sun Official Java Development Kit 7 SE i586/x8664 for Kubuntu 14.04 Trusty Tahr LTS desktop Linux.

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 Kubuntu 14.04 Trusty Bottom there is a Link for Quick Start with Java JDK 7 Development and also to Install the Java Web-Server Tomcat 7 for Kubuntu Linux.

The Contents and Details of How to Download and Install Oracle JDK 8+ on Kubuntu 14.04 Trusty are Expressly Essentials to Give Focus Only to the Essentials Instructions and Commands and Make the Tut Easier to Understand ;)

Getting Started Oracle JDK 7 on Kubuntu 14.04 Trusty - Featured

Download Oracle Java SE JDK for Linux.

Oracle JDK i586/x8664 tar.gz

Select Oracle JDK 7 for Linux
Double-Click on the tar.gz Archive and Extract into/tmp
Or from Shell:
```
tar xvzf ~/Downloads/jdk-7*.tar.gz -C /tmp/
```
Open a Command Line Terminal Window
(Press “Enter” to Execute Commands).
Relocate JDK 7
```
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