code: public static Integer[] toReferenceType(int[] primArr) {
  	Integer[] refArr = new Integer[primArr.length];
  	for (int i = 0; i < primArr.length; i++)
  	    refArr[i] = Integer.valueOf(primArr[i]);
  	return refArr;
      }
docs: convert a primitive array (value type) to Object Array (reference type).
  
  @param primArr value type Array
  @return reference type Array