Ubuntu. Oracle Java 8

Install the JDK

Download the 32bit or 64bit Linux “compressed binary file” – it has a “.tar.gz” file extension

Uncompress it

tar -xvf jdk-8uxx-linux-i586.tar.gz

JDK 7 package is extracted into ./jdk1.8.xx directory. – Now move the JDK 8 directory to /usr/lib

sudo mv jdk1.8.xx /usr/lib/jvm/jdk1.8.xx

Now run

sudo update-alternatives –config java

You will get output as:

$sudo update-alternatives –config java There are 2 choices for the alternative java (providing /usr/bin/java).

Selection Path Priority Status

0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 auto mode
1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode


Press enter to keep the current choice[*], or type selection number:

Remember the last number and press enter to exit this utility i.e. in this example remember the number 2.

if only one alternative is shown then remember the number 0

Now run

sudo update-alternatives –install /usr/bin/java java /usr/lib/jvm/jdk1.8.xx/jre/bin/java 3

This will add your new JDK 8 installation into alternatives list i.e.

use the remembered number + 1 i.e. 3 in the example above.

– Run

sudo update-alternatives –config java

You will see output similar one below – choose the number of jdk1.8.xx i.e. 3:

sudo update-alternatives –config java

There are 3 choices for the alternative java (providing /usr/bin/java).

Selection Path Priority Status

0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 auto mode
1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode
3 /usr/lib/jvm/jdk1.8.xx/jre/bin/java 3 manual mode
Press enter to keep the current choice[*], or type selection number:


3 update-alternatives: using /usr/lib/jvm/jdk1.8.xx/jre/bin/java
to provide /usr/bin/java (java) in manual mode.

Check the version of you new JDK 8 installation:

java -version

java version "1.8.xx"
Java(TM) SE Runtime Environment (build 1.8.xx-bxxx)
Java HotSpot(TM) Server VM (build xx.xx, mixed mode) 

Install the JRE

Download the 32bit or 64bit Linux “compressed binary file” – it has a “.tar.gz” file extension

Uncompress it

tar -xvf jre-8uxx-linux-i586.tar.gz

JRE 7 package is extracted into ./jre1.8.xx directory. – Now move the JRE 8 directory to /usr/lib

sudo mv jre1.8.xx /usr/lib/jvm/jre1.8.xx

Now run

sudo update-alternatives –config java

You will get output as:

sudo update-alternatives –config java

There are 2 choices for the alternative java (providing /usr/bin/java).

Selection Path Priority Status

0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 auto mode
1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode

 
Press enter to keep the current choice[*], or type selection number: 

Remember the last number and press enter to exit this utility i.e. in this example remember the number 2.

if only one alternative is shown then remember the number 0

Now run

sudo update-alternatives –install /usr/bin/java java /usr/lib/jvm/jre1.8.xx/bin/java 3

This will add your new JRE 8 installation into alternatives list i.e.

use the remembered number + 1 i.e. 3 in the example above.

– Run

sudo update-alternatives –config java

You will see output similar one below – choose the number of jre1.8.xx i.e. 3:

sudo update-alternatives –config java

There are 3 choices for the alternative java (providing /usr/bin/java).

Selection Path Priority Status

0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 auto mode
1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode
3 /usr/lib/jvm/jre1.8.xx/jre/bin/java 3 manual mode

Press enter to keep the current choice[*], or type selection number:

3 update-alternatives: using /usr/lib/jvm/jre1.8.xx/jre/bin/java to provide /usr/bin/java (java) in manual mode.

N.B. if there was no previous java installation then the new JRE will be the default and you will not see the above.

Check the version of you new JRE 7 installation:

java -version

java version "1.8.xx"
Java(TM) SE Runtime Environment (build 1.8.xx-bxxx)
Java HotSpot(TM) Server VM (build xx.xx, mixed mode) 

Install the Firefox/Chrome plugin

In a terminal:

mkdir ~/.mozilla/plugins

Remove the IcedTea plugin, if it has been installed.

sudo apt-get remove icedtea6-plugin

Remove a former version of the Java plugin (may or may not be present)

sudo rm ~/.mozilla/plugins/libnpjp2.so

Now you can install the plugin, by creating a symbolic link (you tell Firefox, where the plugin is located).

sudo ln -s /usr/lib/jvm/jre1.8.xx/lib/i386/libnpjp2.so ~/.mozilla/plugins/

Confirm that the JRE has been successful by using the official oracle website.

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Install / upgrade to the latest Oracle Java (JDK) 8 in Ubuntu via ppa:webupd8team/java

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer