The problem is that in Java byte is _signed_ type. So `(byte) 129` is the actual source of the problem, the number is simply out of range (-128 to 127). Since t

The problem is that in Java byte is _signed_ type. So `(byte) 129` is the actual source of the problem, the number is simply out of range (-128 to 127). Since there is no byte literal and numbers by default are integers you always have to cast when calling a function with byte parameter. There is simply no distinction between safe and unsafe cast...