code: protected void checkShrink ()
      {
          if ((_buckets.length > DEFAULT_BUCKETS) &&
                  (_size < (int) (_buckets.length * _loadFactor * .125))) {
              resizeBuckets(Math.max(DEFAULT_BUCKETS, _buckets.length >> 1));
          }
      }
docs: Check to see if we want to shrink the table.