Java convert unsigned big integer to unsigned byte

Question

How to convert unsigned BigInteger into unsigned byte when the value is higher?

String value = "202";
BigInteger a = new BigInteger( value );
Byte b = new BigInteger( value ).byteValue() // returns -54

How to get unsigned byte value from BigInteger?

Answer 1

you should cast "202" to int because java does not have unsigned byte . I suppose .intValue() would help

Answer 2

Maybe you looking for something like this:

import java.math.*;
public class MyClass {
    public static void main(String args[]) {
        String value = "202";
        BigInteger a = new BigInteger( value );
        Byte b = new BigInteger( value ).byteValue() ;
        System.out.println(a);
        System.out.println(unsignedToBytes((byte)b));
    }

    public static int unsignedToBytes(byte b) {
    return (int)b & 0xFF;
  }
}

and here is a very good explanation: Can we make unsigned byte in Java