Moving from JDK 1.7 to JDK 1.8 on Ubuntu

Question

I am on UBUNTU. JDK version currently installed is:

java version "1.7.0_51" Java(TM) SE Runtime Environment (build 1.7.0_51-b13) Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode) 

the configuration being installed is:

sudo update-alternatives --config java There is only one alternative in link group java  (providing /usr/bin/java):     /usr/lib/jvm/java-7-oracle/jre/bin/java 

I downloaded the latest tar.gz archive of JDK 1.8.

How can I easily install JDK 1.8 from tar.gz overriding/uninstalling the JDK 1.7 currently installed? Or even without explicitly use the tar.gz.

Answer 1

This is what I do on debian - I suspect it should work on ubuntu (amend the version as required + adapt the folder where you want to copy the JDK files as you wish, I'm using /opt/jdk):

wget --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u71-b15/jdk-8u71-linux-x64.tar.gz sudo mkdir /opt/jdk sudo tar -zxf jdk-8u71-linux-x64.tar.gz -C /opt/jdk/ rm jdk-8u71-linux-x64.tar.gz 

Then update-alternatives:

sudo update-alternatives --install /usr/bin/java java /opt/jdk/jdk1.8.0_71/bin/java 1 sudo update-alternatives --install /usr/bin/javac javac /opt/jdk/jdk1.8.0_71/bin/javac 1 

Select the number corresponding to the /opt/jdk/jdk1.8.0_71/bin/java when running the following commands:

sudo update-alternatives --config java sudo update-alternatives --config javac 

Finally, verify that the correct version is selected:

java -version javac -version 

Answer 2

Just use these command lines:

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

If needed, you can also follow this Ubuntu tutorial.