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Quick update: Oracle has released Java 7 update 11 which fixes a critical security vulnerability in update 10, so if you're using our PPA, update to the latest JDK 7u11 as soon as possible.

Also, with Oracle Java 7u11, the default security level for Java applets and web start applications has been increased form Medium to High:

"This affects the conditions under which unsigned (sandboxed) Java web applications can run. Previously, as long as you had the latest secure Java release installed applets and web start applications would continue to run as always. With the "High" setting the user is always warned before any unsigned application is run to prevent silent exploitation."

The Oracle Java 7u11 release notes are available HERE.

To install / upgrade to the latest Oracle Java (JDK) 7u11 in Ubuntu 13.04, 12.10, 12.04, 11.10, 11.04, 10.10 and 10.04, use the following commands:

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

For Debian, see: How To Install Oracle Java 7 In Debian Via Repository

More info on our Oracle Java 7 installer and PPA repository, here: Install Oracle Java 7 in Ubuntu via PPA Repository