Convert a byte array to a fixed length alphanumeric string

Question

In Java, what's the best library/method to map a 13-character string to a 3-character string for the error check purpose? Thanks!

erickson · Accepted Answer · 2012-08-30 06:50:25Z

1

There isn't a built-in method for this. You could implement a 24-bit CRC, if you really mean 3 bytes rather than characters.

If you do mean char, what characters do you accept in the output? Only ASCII? Any Unicode character?

answered Aug 30, 2012 at 6:50

erickson

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1 Comment

CRC is similar to what I want. Yes, ASCII is what I want.

Peter Lawrey · Accepted Answer · 2012-08-30 07:19:30Z

1

The simplest approach would be to use the hashCode()

int threeByteHash = string.hashCode() & 0xFFFFFF;

answered Aug 30, 2012 at 7:19

Peter Lawrey

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