How to convert csv byte string to byte array in Java?

Question

I have a csv string to bytes and i want to convert it in java byte array. Can anyone help me.

csv string

167, 27, 32, 195

The byte array should be like this

byte[0] should give me 167
byte[1] should give me 27
byte[2] should give me 32
byte[3] should give me 195

Please note, in Java, byte ranges from -128 to 127, not 0 to 255! — Haozhun, Jul 19 '12 at 06:51
this means i should use unsigned byte array, will this solve my problem? — Salman, Jul 19 '12 at 06:53
In java, there is no such keyword 'unsigned'. You either need to use short, or let your program work fine with signed bytes. — Haozhun, Jul 19 '12 at 06:55
thanks guys, i found the solution [here](http://stackoverflow.com/questions/4266756/can-we-make-unsigned-byte-in-java), i hope this will also help anyone else — Salman, Jul 19 '12 at 07:04

Jirka Hanika · Accepted Answer · 2012-07-19T07:29:10.700

1

You can use an array of characters. The char type is intended to represent characters in Java.

String csv = "167, 27, 32, 195";
String[] numbers = csv.split(", ");
char[] chars = new char[numbers.length];
for (int i = 0; i < numbers.length; i++)
    chars[i] = (char)Integer.parseInt(numbers[i]);

This method assumes that the numbers in the CSV file are Unicode code points of the characters.

edited Jul 19 '12 at 07:29

answered Jul 19 '12 at 07:09

Jirka Hanika

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Its giving an error on `(char)numbers[i];` **cannot cast String to char**, well i have already fixed the problem you can see in comments of the question – Salman Jul 19 '12 at 07:22

How to convert csv byte string to byte array in Java?

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