code: private void expand()
      {
          int i;
          if (isCompact) {
              byte[]  tempArray;
              hashes = new int[INDEXCOUNT];
              tempArray = new byte[UNICODECOUNT];
              for (i = 0; i < UNICODECOUNT; ++i) {
                  byte value = elementAt((char)i);
                  tempArray[i] = value;
                  touchBlock(i >> BLOCKSHIFT, value);
              }
              for (i = 0; i < INDEXCOUNT; ++i) {
                  indices[i] = (char)(i<<BLOCKSHIFT);
              }
              values = null;
              values = tempArray;
              isCompact = false;
          }
      }
docs: Expanding takes the array back to a 65536 element array.