String codification UTF-8 to get 1 Byte

I have a problem when I try to write String in a file. For example, I have this code to convert an Integer value to a 2-byte String but the String codification convert Integer to invisible bytes.

I need to convert, for example, 45557 integer number on 2 bytes 0xB1 and 0xF5 and convert it to String õ±. Then, in other processes, decoding õ± to get B1F5.

The problem is when I try decode õ±, I get C3B5C2B1. I know it is a problem of String codification but how can I solve it?

I'm trying this:

int iInteger = 45557;int iLow    =  iInteger & 0b0000000011111111;int iHight  = (iInteger & 0b1111111100000000)>>8;file_raw.open_file();file_raw.println (" Character 1 num: " + iLow);file_raw.println (" Character 2 num:" + iHight);String cLow = new Character((char) 245).toString();String cHigh = new Character((char) 177).toString();

Then the result is:

Character 1 num: 245Character 2 num:177Character 1 string: õCharacter 2 string :±

To your eyes they are good but when I am going to decode those characters to HEX I get 16-bit values because the coding is in UTF-8:

õ -> C3B5 (conversion on notepad++ or internet converters)± -> C2B1

Just I want:

õ -> F5± -> B1