code: public static void bucketSort(final Object[] a, final int fromIndex, final int toIndex) {
          Array.bucketSort(a, fromIndex, toIndex);
      }
docs: Note: All the objects with same value will be replaced with first element with the same value.
  
  @param a the elements in the array must implements the <code>Comparable</code> interface.
  @param fromIndex
  @param toIndex