+ /**
+ * Converts an array of bytes into a String representing the hexadecimal
+ * values of each byte in order. The returned String will be double the
+ * length of the passed array, as it takes two characters to represent any
+ * given byte.
+ *
+ * @param data
+ * a byte[] to convert to Hex characters
+ * @return A String containing hexadecimal characters
+ * @since 1.4
+ */
+ public static String encodeHexString(byte[] data) {
+ return new String(encodeHex(data));
+ }
+
+ /**
+ * Converts an array of bytes into an array of characters representing the
+ * hexadecimal values of each byte in order. The returned array will be
+ * double the length of the passed array, as it takes two characters to
+ * represent any given byte.
+ *
+ * @param data
+ * a byte[] to convert to Hex characters
+ * @return A char[] containing hexadecimal characters
+ */
+ public static char[] encodeHex(byte[] data) {
+ return encodeHex(data, true);
+ }
+
+ /**
+ * Converts an array of bytes into an array of characters representing the
+ * hexadecimal values of each byte in order. The returned array will be
+ * double the length of the passed array, as it takes two characters to
+ * represent any given byte.
+ *
+ * @param data
+ * a byte[] to convert to Hex characters
+ * @param toLowerCase
+ * <code>true</code> converts to lowercase, <code>false</code> to
+ * uppercase
+ * @return A char[] containing hexadecimal characters
+ * @since 1.4
+ */
+ public static char[] encodeHex(byte[] data, boolean toLowerCase) {
+ return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
+ }
+
+ /**
+ * Converts an array of bytes into an array of characters representing the
+ * hexadecimal values of each byte in order. The returned array will be
+ * double the length of the passed array, as it takes two characters to
+ * represent any given byte.
+ *
+ * @param data
+ * a byte[] to convert to Hex characters
+ * @param toDigits
+ * the output alphabet
+ * @return A char[] containing hexadecimal characters
+ * @since 1.4
+ */
+ protected static char[] encodeHex(byte[] data, char[] toDigits) {
+ int l = data.length;
+ char[] out = new char[l << 1];
+ // two characters form the hex value.
+ for (int i = 0, j = 0; i < l; i++) {
+ out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
+ out[j++] = toDigits[0x0F & data[i]];
+ }
+ return out;