Make sure that fakeroot and java-package are installed:

# apt-get install fakeroot java-package

Download the .tgz version of the JDK from http://www.ibm.com/developerworks/java/jdk/linux/download.html.

Edit /usr/share/java-package/ibm-j2sdk.sh and (if necessary) add an entry for the particular version of the IBM JDK downloaded in the previous step.

Build a Debian package from the tarball:

$ fakeroot make-jpkg xxxx.tgz

Install the Debian package.