I want to convert decimal -10 value to hex in a String and byte array format.
I have tried
String minHex = Integer.toHexString(Integer.valueOf(-10));
System.out.println(minHex);
Which results in fffffff6 , and I think it is not correct. And for converting byte array I am using below function which I found from
Convert a string representation of a hex dump to a byte array using Java?
public static byte[] hexStringToByteArray(String s) {
int len = s.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
+ Character.digit(s.charAt(i+1), 16));
}
return data;
}
So also not sure it will work for minus hex value or not.
To convert an hex to a String
the way you expect it ie -10
is converted to -a
, use:
String hex = Integer.toString(-10, 16);
To convert to a byte
array, simply convert the int
to a byte
array, it is represented the same way:
byte[] bytes = ByteBuffer.allocate(4).putInt(-10).array();
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