1) add-apt-repository “deb http://archive.canonical.com/ lucid partner”
2) sudo apt-get update
3) sudo apt-get install sun-java6-bin sun-java6-jre

sudo apt-get http://archive.canonical.com/ubuntu lucid partner ???

http://www.clickonf5.org/linux/how-install-sun-java-ubuntu-1004-lts/7777