Tom Brito Tom Brito - 3 months ago 5
Java Question

Is this the best way to convert String hex to bytes?

Is this the best way to convert String hex to bytes?
Or can you think a shorter/simpler?

public static byte[] hexToBytes(String hex) {
return hexToBytes(hex.toCharArray());
}

public static byte[] hexToBytes(char[] hex) {
int length = hex.length / 2;
byte[] raw = new byte[length];
for (int i = 0; i < length; i++) {
int high = Character.digit(hex[i * 2], 16);
int low = Character.digit(hex[i * 2 + 1], 16);
int value = (high << 4) | low;
if (value > 127)
value -= 256;
raw[i] = (byte) value;
}
return raw;
}

Answer
byte[] yourBytes = new BigInteger(hexString, 16).toByteArray();
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