In order to update to the latest java version on Ubuntu you need to download the latest tar ball from the Java website www.java.com

Unzip this using the command:

tar zxvf jdk-8u66-linux-x64.tar.gz -C /usr/java

Next tell the system that there is a new java version:

update-alternatives --install "/usr/bin/java" "java" "/usr/java/jre1.8.0_66/bin/java" 1

Now set this JDK/JRE as default:

update-alternatives --set java /usr/java/jre1.8.0_66/bin/java

Now check the version:

java -version

Updating Java to latest version on Ubuntu

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