It did at one point, I recall Sun had that exact bug at some point back around 1.4, I remember it being fixed. Of course the long conversions alleviate the problem but at a performance cost and its an avoidable cast.
No java doesn't use 64bits at all. It uses unsigned right shift. I mentioned it in another post: "int mid = (low + high) >>> 1;"... And for the older timers (14y ago), there used to be a bug[0] about exactly that.
