比较ArrayList中的float

Question

我有这个 :

Offers eoResponse = eoClient.getOffers(url);
Collections.sort(eoResponse, new Comparator<Offer>() {
  public int compare(Offer offer1, Offer offer2) {
    return offer1.getAmount().compareToIgnoreCase(offer2.getAmount()); // errors in this line cannot resolve method compareToIgnoreCase(float)
  }
});

我想要比价格排序我的arraylist,但我有这个错误:

 cannot resolve method compareToIgnoreCase(float)

怎么了

Answer 1

听起来你可能想要:

return Float.compare(offer1.getAmount(), offer2.getAmount());

那就是getAmount()返回一个float- 这意味着你将无法直接调用它上面的方法,但这Float.compare是一个方便的解决方法.

如果getAmount()实际返回a Float(并且您知道它将为非null),您可以使用:

return offer1.getAmount(),compare(offer2.getAmount());