Install JDK5 on Ubuntu 10.04

Add the following to /etc/apt/sources.list:

deb http://us.archive.ubuntu.com/ubuntu/ jaunty multiverse

deb http://us.archive.ubuntu.com/ubuntu/ jaunty-updates multiverse

Update the package list:

sudo apt-get update

Install Sun Java 1.5:

sudo apt-get install sun-java5-jdk

List all Java versions installed:

sudo update-java-alternatives –l

sudo update-java-alternatives -s java-1.5.0-sun