public void ensureCapacity(int minCapacity) {
    int oldCapacity = myData.length;
    if (minCapacity > oldCapacity){
      int newCapacity = oldCapacity * 3 / 2 + 1;
      if (newCapacity < minCapacity){
        newCapacity = minCapacity;
      }
      myData = ArrayUtil.realloc(myData, newCapacity);
    }
  }
public void ensureCapacity(int minCapacity)