Java tutorial
//package com.java2s; import android.text.TextUtils; public class Main { public static boolean isLetterBegin(String s) { if (TextUtils.isEmpty(s)) return false; else { char c = s.charAt(0); int i = (int) c; if ((i >= 65 && i <= 90) || (i >= 97 && i <= 122)) { return true; } else { return false; } } } }