code: public static char pickChar(String values) {
  		if (values == null || values.length() == 0)
  			return '\0';
  
  		int index = RandomInteger.nextInteger(values.length());
  		return values.charAt(index);
  	}
docs: Picks a random character from a string.
  
  @param values a string to pick a char from
  @return a randomly picked char.