How to instal Oracle Java 8 by hand and PPA

Hi this video is about how to install Oracle Java 8 in Elementary OS 0.3

This is by hand. Also you can do it by ppa i'll put both method.

How to download Java 8 JDK and setup in ElementaryOS "BY HAND!"

Note: This can be done also in Ubuntu*

1. Go to http://www.oracle.com/technetwork/es/java/javase/downloads/index.html

Dowload -> oracle jdk

1.1 Check your arch

Use uname -a

If appears. i386 or i686, then your OS is 32bit mode

If appears x86_64 you are in 64 bits

2. Select for .tar.gz

Choice a package right for your ARCH

3. Download it

4. Extract to /usr/lib/jvm

ls -l /usr/lib/jvm

If not exist, create 

mkdir -p /usr/lib/jvm

4.1 Extract

  go to your Download Directory

sudo tar -xvzf jdk.tar.gz -C /usr/lib/jvm

5. Apply correct owner

cd /usr/lib/jvm

chown -R root:root jdk-dir/*

chown -R root:root jdk-dir

6. Create a syslink

ln -s jdk-version java-8-oracle

7. Select Java 8 as default alternative

update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/java-8-oracle/bin/java" 0

update-alternatives --install "/usr/bin/java" "javac" "/usr/lib/jvm/java-8-oracle/bin/javac" 0

update-alternatives --install "/usr/bin/java" "javaws" "/usr/lib/jvm/java-8-oracle/bin/javaws" 0

8. Check your selection

update-alternatives --config java

2. Using PPA

sudo add-apt-repository ppa:webupd8team/java sudo apt-get update

For Java 8: sudo apt-get install oracle-java8-installer Java 7: sudo apt-get install oracle-java7-installer

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# This is OPTIONAL but IMPORTANT

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FOR ENABLE JAVA PLUG-IN IN FIREFOX

1. Create this directory

mkdir -p ~/.mozilla/plugins

Now we will create the link to the plug-in remember. Choice the correct one for your ARCH*

For 64bit

ln -s /usr/lib/jvm/java-8-oracle/jre/lib/amd64/libnpjp2.so ~/.mozilla/plugins/

For i386

ln -s /usr/lib/jvm/java-8-oracle/jre/lib/i386/libnpjp2.so ~/.mozilla/plugins/

2. How to check if Java is enabled?

Go to

https://www.java.com/es/download/installed8.jsp

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# SET YOUR JAVA_HOME

###############

This is important for APPS like Android studio, that needs Java_home, minecraft, and others..

*USE YOUR FAVORITE EDITOR*

sudo vim /etc/profile

#ADD THIS LINES

export JAVA_HOME=/usr/lib/jvm/java-8-oracle

export PATH=$JAVA_HOME/bin:$PATH

Save and close the file. Just logout and login back to see new changes. 

Alternatively, type the following command to activate the new path settings immediately:

Logout and login again.

Verify new settings:

$ echo $JAVA_HOME

$ echo $PATH

$ which java