Checkout alternatives
It seems your different java programs point to different executables. Debian uses link redirection for programs for which alternative implementations exist, such as java with gcj, kaffe, sun-java5 and sun-java6, openjdk, ...
In the past, you had to exchange them individually with the alternative update program .
, - : update-java-alternatives. java-commons. .
sudo update-java-alternatives -l
, java
sudo update-java-alternatives -s java-6-openjdk
Java , openjdk.
, gui, . Ubuntu ( debian) System → Administration → Alternatives Configurator.