IQAndreas

private static void rangeCheck(int arrayLen, int fromIndex, int toIndex) {
     if (fromIndex > toIndex)
          throw new IllegalArgumentException("fromIndex(" + fromIndex + ") > toIndex(" + toIndex+")");
     if (fromIndex < 0) 
          throw new ArrayIndexOutOfBoundsException(fromIndex);
     if (toIndex > arrayLen) 
          throw new ArrayIndexOutOfBoundsException(toIndex);
}