Make Java environment,Stuck on Debian

Make Java environment on Debian Lenny

(non free)

I stuck to ant for jruby.

1st.add it your /etc/apt/sources.list

deb http://mirrors.kernel.org/debian/ lenny main non-free
# this is your main mirrors when you install
deb-src http://mirrors.kernel.org/debian/ lenny main non-free
# this is your main mirrors when you install

deb http://security.debian.org/ lenny/updates main non-free
deb-src http://security.debian.org/ lenny/updates main non-free

2nd.

aptitude update
aptitude install sun-java6-jdk

3rd.if you need.
update-java-alternatives -s java-6-sun
echo 'JAVA_HOME="/usr/lib/jvm/java-6-sun"' | tee -a /etc/environment