Java 7 update 51 looks like this.
Haven't been tempted by Java 8 yet!
Is your version much earlier and lacks required dialog perhaps?
Java control panel
security tab
edit site list
in location put IP of your ZD.
OK
close dialogues.
reload map view page in ZD GUI.
and should now be working
Done.
Note: map view is probably not as wonderful as you are hoping it is going to be!