Usually the reasons for jaywalking are either 1) the road is empty or 2) late for a train/tram/bus.
edit: It should also be noted that jaywalking is not illegal in germany IF 1) you're not crossing the road at an intersection with traffic lights for pedestrians AND it is red or 2) you're crossing the road in the shortest and fastest manner without impeding, endangering or otherwise causing trouble in traffic.
So if you walked over the road, a police officer could at worst give you a stern talking to. If you crossed a road with a red light for pedestrians, you'd get a 5€ fine.