Just Java™ 2

What Happens on Overflow?

When a result is too big for the type intended to hold it because of a cast, an implicit type conversion, or the evaluation of an expression, something has to give! What happens depends on whether the result type is integer or floating point.

Integer overflow

When an integer-valued expression is too big for its type, only the low end (least significant) bits get stored. Because of the way two's-complement numbers are stored, adding one to the highest positive integer value gives a result of the highest negative integer value. Watch out for this (it's true for all languages that use standard arithmetic, not ...