Manual java alternative

[Marko Randjelovic <marel@sbb.co.yu>]

I installed jdk1.6.0 in /opt by running sun's package 
"jdk-6-linux-amd64.bin". Now I need to update alternatives, but there 
are 64 of them and that would be to complicated. I made a file 
.jdk.jinfo in /usr/lib/jvm and tried to run update-java-alternatives, 
but it looks like it doesn't work.

Is there some way to easily switch to new java that is not installed 
with .deb? Or is there some Debian package for jdk6 or jdk-1.5.0_8, 
since this newest 1.5.0_10 made me problems?

regards