Maybe you should think about writing the bank a letter and say what you think about this stupid Java requirement, doubt it will make a difference though, but if no Norwegians complain it will never change.
You are on a Mac which is kinda secure, what about all those Norwegian people with Windows and Java.
Java is cheap, what I mean by this is it is cheaper for them because it is cross platform, if they run Java on their systems it's their business but they should not force you into installing Java.
I have it disabled for a long time, lucky me, my bank works fine without it.
They just announced in the papers today that the banks are getting rid of it! Might still take a little while before it's implemented, but they're doing a press conference on it on Thursday, so hopefully that means it's not too far away. Good riddance...