code: public Object get (int key)
      {
          int size = _keys.length, start = key % size;
          for (int ii = 0; ii < size; ii++) {
              int idx = (ii + start) % size;
              if (_keys[idx] == key) {
                  return _values[idx];
              }
          }
          return null;
      }
docs: Returns the object with the specified key, null if no object exists
  in the table with that key.