public static void main(String arg[]) {
byteArrayToHexString(("abc").getBytes());
}
public static String byteArrayToHexString(byte[] b) {
StringBuffer sb = new StringBuffer(b.length * 2); for (int i = 0; i < b.length; i++) { int v = b[i] & 0xff; if (v < 16) {
sb.append('0');
}
sb.append(Integer.toHexString(v));
} return sb.toString().toUpperCase();
}