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package com.example.nfc_eink_demo; /*www .j av a 2 s . co m*/ public class Utilities { /** * Given a byte array, return a string with a hexadecimal representation * * @param byteArray * The array of bytes to be converted * @return A string representing each nibble of the byte array as a hex * character */ public static String getHexParsed(byte[] byteArray) { String HEXMAP = "0123456789ABCDEF"; if (byteArray == null) { return null; } final StringBuilder hex = new StringBuilder(2 * byteArray.length); for (final byte b : byteArray) { hex.append("0x"); hex.append(HEXMAP.charAt((b & 0xF0) >> 4)).append( HEXMAP.charAt((b & 0x0F))); hex.append(","); } return hex.toString(); }// end getHexParsed /** * Returns a character-reversed version of a string * * @param s * The original string * @return The character-reversed string */ public static String reverse(String s) { String reverseStringVariable = ""; for (int i = s.length() - 1; i != -1; i--) { reverseStringVariable += s.charAt(i); } return reverseStringVariable; }// end reverse };