Ubuntu :: lenny :: install Java

Copy the lines below to /etc/apt/sources.list

deb http://ftp.us.debian.org/debian/ lenny non-free
deb http://ftp.us.debian.org/debian/ lenny contrib 

Run the update

$ sudo apt-get update

Install Java

$ sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-jdk sun-java6-fonts

Check:

$ java -version

$ which javac