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Java Forum / General / November 2006INT to BYTE
How can we convert a primitive java int to Java byte. byte and not byte[]. Waiting for replies. int myInt = 65; byte myByte = (byte) (myInt & 0xFF); Greetings, Jan > How can we convert a primitive java int to Java byte. > byte and not byte[]. > > Waiting for replies.  Signature__________________________________________________________ insOMnia - We never sleep... http://www.insomnia-hq.de There is a commons library that makes conversion very easy: http://jakarta.apache.org/commons/codec/ Ryan > How can we convert a primitive java int to Java byte. > byte and not byte[]. > > Waiting for replies. > There is a commons library that makes conversion very easy: > > http://jakarta.apache.org/commons/codec/ .. which does many things but that's one one of them. A simple cast is all that's required, as already posted, but the '& 0xff' is not required. The cast does that already. Hmm, thought I did the same thing using the codec lib. Of course, my brain is %90 malted hops and bong resin; so thanks for correcting me. - Ryan > > There is a commons library that makes conversion very easy: > > [quoted text clipped - 4 lines] > A simple cast is all that's required, as already posted, but the '& > 0xff' is not required. The cast does that already. > A simple cast is all that's required, as already posted, but the '& > 0xff' is not required. The cast does that already. It *is* required if you want the output be between 0 and 255. Sorry, I thought it was from byte->int. It's not necessary here. > > A simple cast is all that's required, as already posted, but the '& > > 0xff' is not required. The cast does that already.It *is* required if you want the output be between 0 and 255. > > A simple cast is all that's required, as already posted, but the '& > > 0xff' is not required. The cast does that already. > > It *is* required if you want the output be between 0 and 255. Depends on whether you want to mask an integer value down to a byte value, i.e. a value between 0 and 255 inclusive; or whether you want to put the resulting value into a Java byte variable (or array slot) which holds values in the range -128 to +127 inclusive. In the former case you should mask with 0xFF (but don't cast, leave the result as an int); in the later case you just cast (masking will gain exactly nothing). -- chris Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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