HexUtil.java

package com.github.mob41.blapi;

public class HexUtil {

    private static final char[] hexCode = "0123456789abcdef".toCharArray();

    public static String bytes2hex(byte[] data) {
        StringBuilder r = new StringBuilder(data.length * 2);
        byte[] var3 = data;
        int var4 = data.length;

        for(int var5 = 0; var5 < var4; ++var5) {
            byte b = var3[var5];
            r.append(hexCode[b >> 4 & 15]);
            r.append(hexCode[b & 15]);
        }

        return r.toString();
    }
    public static final byte[] hex2bytes(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;
    }

}