/* Given a string and an index, return a string length 2 starting at the * given index. If the index is too big or too small to define a string * length 2, use the first 2 chars. The string length will be at least 2. */ public String twoChar(String str, int index) { if(index + 2 > str.length() || index < 0) return str.substring(0, 2); return str.substring(index, index + 2); }