Oracle-Sun Java JDK 7 How to Install and Getting Started on Pear-Linux 5 Gnome3 32bit Easy Visual-Guide

September 29, 2012 | By Duchateaux.

The Guide shows you How to Install Oracle-Sun Java JDK 7 for Pear-Linux 5 GNOME3 i386 Desktop.

After Installing you will need to Use the update-alternatives Tool to Update your System Java to 1.7 JDK.

Finally, to the article Bottom there is a Link to Install Firefox Aurora on Pear Linux.

And this Visual Guide includes the Basic Screenshots of All GUI Steps involved.

The Content give Focus Only to the Essentials Instructions and Commands to make it Easier to Follow.

Here Download Oracle Java SE JDK 7:

JDK 7 i586.tar.gz

Link to Download the Latest JDK Release
Find and Double-Click on the tar.gz Archive

Extract it Into the /tmp Folder.
Open a Terminal Window
(Press “Enter” to Execute Commands)

Pear Linux 5 >> Terminal.
Relocate JDK 7
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```
sudo su
```
If Got “User is Not in Sudoers file” then see: How to Enable sudo
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```
if [ ! -d "/usr/lib/jvm" ]; then mkdir /usr/lib/jvm; fi
```
The above command is used to create a jvm directory if not already there.
Copy
```
sudo chown -R root:root /tmp/jdk1.7*
```
Reiterate the Execution Permission over the Java binaries
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```
chmod -R +x /tmp/jdk1.7*/bin
```
Finally, Shift the Java contents with
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```
mv /tmp/jdk1.7* /usr/lib/jvm/
```

Installing Oracle Java JDK 7

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

Copy

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

Copy

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

Copy

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.

Copy

update-alternatives --config java

And for the Java Compiler instead:

Copy

sudo update-alternatives --config javac

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

Optionally Set Java Environment Variable.
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```
su <myUser>
```
Copy
```
nano $HOME/.bashrc
```
Append:
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```
export JAVA_HOME=/usr/lib/jvm/jdk1.<X.Y_uZ>
```
Ctrl+x to Save & Exit from nano :)
Copy
```
source $HOME/.bashrc
```
How to Install Oracle Java Browser Plug-In:

Here Install Oracle Java Firefox PlugIn

How to Install Oracle Java JDK Firefox Plugin

Here Firefox Aurora on Pear

Linux Mint 12-13 Howto Install Firefox Aurora Pear Linux