Path: csiph.com!goblin2!goblin.stu.neva.ru!news-hub.siol.net!news1.t-com.hr!.POSTED!not-for-mail From: Askfor Newsgroups: comp.lang.java.programmer Subject: Re: number to byte[] Date: Sat, 17 Oct 2015 23:03:56 +0200 Organization: T-Com Lines: 28 Message-ID: References: NNTP-Posting-Host: 93-141-14-15.adsl.net.t-com.hr Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ls237.t-com.hr 1445115846 14685 93.141.14.15 (17 Oct 2015 21:04:06 GMT) X-Complaints-To: abuse@t-com.hr NNTP-Posting-Date: Sat, 17 Oct 2015 21:04:06 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 In-Reply-To: Xref: csiph.com comp.lang.java.programmer:32891 On 10/17/2015 02:03 PM, Eric Sosman wrote: > On 10/17/2015 4:02 AM, Askfor wrote: >> I am trying to get 4 byte[] representation of an integer, which might be >> 32 bit long. >> >> Obviously, I could AND with 255 and take byteValue(), then shift 8 times >> to the right and repeat the process 3 times. Is there any more elegant >> way ? > > I can't think of one, off-hand. > > But *why* do you want this four-byte array? Are you planning to > write it to some output destination? If so, perhaps you should use a > DataOutputStream (or other DataOutput implementation) and call its > writeInt() method. Or, perhaps you should use an IntBuffer. What > are you trying to do? > It is going to be a part of a data header, which needs to be of fixed length. Also it will contain a value of an offset which cabn't be longer than 32-bits. So, I don't care how big int actually is, as long as it is big enough to hold 32 bit unsigned value. I started with serialization, too, but I realized it won't work. Thanks.