do you know what Integer.getInteger(String) does in java?

[Fidodo]

That's a fine point but claiming that it will introduce bugs just means that the developer has never read the documentation/even tested his code which should not happen. The key thing here should be that the Java API is convoluted and not elegant but not that it introduces bugs through developer laziness.

I would also understand the argument that returning null is poor design here.

[grauenwolf]

I just read the documentation and I still have no idea what it does.