My wrote: [...] > when i got into the debug mode and ceck the variable, the value was > -64 but the Hexadecimal value is (0xC0)
Java bytes are signed. The Eclipse debugger shouldn't be showing you the value as 0xC0 --- that's incorrect; it should be giving you -40. In order to get what you want, you need to convert the byte into an integer and then truncate it down to an unsigned 8-bit value. byte a = -64; int b = ((int)a) & 0xFF; assert(b == 0xC0); All Java types are unsigned (except char). Yes, that's dumb. -- ┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ ───── http://www.cowlark.com ───── │ "I have always wished for my computer to be as easy to use as my │ telephone; my wish has come true because I can no longer figure out │ how to use my telephone." --- Bjarne Stroustrup
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