Convert byte[] to string to byte[]

Asked Feb 17 '17 at 00:43

Active Feb 17 '17 at 01:36

Viewed 91 times

Let us assume that I have a byte[], I want to convert it to String and then back to byte[].

byte[] b = {-23, -38, 62, 22, -25, -23, 46, 106, -38, 13, -2, -46, 6, -110, 25, -82};   
System.out.println(Arrays.toString(new String(b).getBytes()));

I receive other byte[]:

[-17, -65, -67, -17, -65, -67, 62, 22, -17, -65, -67, -17, -65, -67, 46, 106, -17, -65, -67, 13, -17, -65, -67, -17, -65, -67, 6, -17, -65, -67, 25, -17, -65, -67]

Why is this happening? I can get an initial byte[] thus?

edited Feb 17 '17 at 01:13

Ousmane D.

54,915
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asked Feb 17 '17 at 00:43

MrHoj

Most of the byte sequences in the _other byte[]_ are replacement sequences for invalid input. Specifically, the UTF8 replacement sequence. – Sotirios Delimanolis Feb 17 '17 at 00:52
Use utf16be to roundtrip your string nicely ([demo](http://ideone.com/8K7Gvp)). – Sergey Kalinichenko Feb 17 '17 at 01:07
The simple answer is don't. `String` is not a container for binary data. – user207421 Feb 17 '17 at 02:09
@dasblinkenlight, many thanks for your decision! – MrHoj Feb 17 '17 at 17:16

Convert byte[] to string to byte[]

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