Install JAVA on Ubuntu 9.04

=> cp /etc/apt/sources.list /opt/sources.list.orig

=> Change following settings in /etc/apt/sources.list

deb http://old-releases.ubuntu.com/ubuntu natty main

deb http://old-releases.ubuntu.com/ubuntu natty main restricted universe multiverse

deb http://old-releases.ubuntu.com/ubuntu natty-updates main restricted universe multiverse

deb http://old-releases.ubuntu.com/ubuntu natty-security main restricted universe multiverse

=> apt-get update

=> mv /var/lib/apt/lists /opt/lists.orig

=> mkdir -p /var/lib/apt/lists/partial

=> apt-get update

=> cd /var/cache/apt/archives

=> tar -cvf /opt/archives.tar *.deb

=> apt-get clean

=> apt-get install default-jre --no-install-recommends

NOTE :- In my case packages were just downloaded but not installed. so in such case do as following:-

=> cd /var/cache/apt/archives

=> dpkg -i *.deb