code: static Integer[] createIntegers() {
          int len = INTEGER_UPPER_BOUND - INTEGER_LOWER_BOUND + 1;
          Integer[] ret = new Integer[len];
          int val = (int) INTEGER_LOWER_BOUND;
          for (int i = 0; i < len; i++, val++) {
              ret[i] = new Integer(val);
          }
          return ret;
      }
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