I just want to start netbeans and what happens? Nothing. After trying it twice (via fbrun), i tried it a third time via cli/shell and there was the error "Cannot find java. Please use the --jdkhome switch.". Next stap was to ask the preferred search engine which leads to ... well nearly no good solution. So i searched a bit wild and after a time, my mind told me to look for two reasons.
The first look was to "where the hell is my current jvm installed?" which leads me to "/usr/bin/jvm/java-*". After that i located my current netbeans.conf and take a look into it.
In the "netbeans.conf" file, my eyes founded a missconfigured line where the "netbeans_home" pointed to a non existing path. Quickly adapted it and "et voila", everything is working again.
Hint: With this configuration, you can easily switch your current used jvm!