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bigInteger to smaller number in java

Posted on 2011-03-16
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Last Modified: 2013-11-13
hello, am trying to convert a very large  BigInteger into a more workable form in java.  the biginteger is about 20 lines long and i wanted to convert it into maybe a hex-decimal or a base 36 form.  is there any way to do that in java?   thank you in advance
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Question by:gmakungo22
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by:enachemc
ID: 35145878
use java.math.BigInteger class
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by:TommySzalapski
ID: 35150768
BigIntegers are stored in binary (or hex, however you want to look at it). It just displays it in decimal for you. If you think of the computer as working in bytes, then it basically stores it in base 256. If you want to store it in a file in this format, you just need to open the file in binary format. However, in the RAM it's already like that so you don't really have to do anything.
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dpearson earned 125 total points
ID: 35153944
You want to use the
BigInteger.toString(int radix)
method.

This will convert the BigInteger into a String using whatever base (radix) you would like.  For example, for hex you'd use:
BigInteger myBigInteger;
String hexString = myBigInteger.toString(16);

More here:
http://download.oracle.com/javase/1.4.2/docs/api/java/math/BigInteger.html#toString%28int%29

Doug
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