Solution for Ubuntu 12.04 and Oracle Java 7first method, leaving openjdk installed: http://askubuntu.com/questions/183867/how-do-i-update-oracle-java-7-jdk-and-jre$ sudo add-apt-repository ppa:webupd8team/java$ sudo apt-get update$ sudo apt-get install oracle-java7-installer$ sudo update-java-alternatives -s java-7-oraclesecond method, removing openjdk: http://askubuntu.com/questions/143781/used-purge-command-to-remove-java-it-removed-a-lot-more-than-java$ sudo apt-get purge openjdk*$ sudo add-apt-repository ppa:webupd8team/java$ sudo apt-get update$ sudo apt-get install oracle-java7-installer