Here you can find the source of numToLetter(String input)
public static String numToLetter(String input)
//package com.java2s; //License from project: Open Source License public class Main { public static String numToLetter(String input) { StringBuffer sb = new StringBuffer(); byte[] bytes = input.getBytes(); for (int i = 0; i < bytes.length; i++) { if (i % 2 == 0) { sb.append((char) (bytes[i] + 49)); } else { sb.append((char) (bytes[i] + 17)); }/*www .ja v a2s .c o m*/ } return sb.toString(); } }