我需要更新我的 List<Cards> 中的一个数据。类卡看起来像这样：
public class Cards implements Comparable<Cards>{
private int cardImage, cardID, cardScore;
public Cards(int cardImage, int cardID, int cardScore){
this.cardImage = cardImage;
this.cardID = cardID;
this.cardScore = cardScore;
}
public int getImage(){
return cardImage;
}
public int getId(){
return cardID;
}
public int getScore(){return cardScore;}
@Override
public int compareTo(Cards o) {
return this.cardID > o.cardID ? 1 : (this.cardID < o.cardID ? -1 : 0);
}在我的 MainActivity 类中，我启动了 List cardsList = new ArrayList<>(); 并像这样填充它
for (i = 0; i < lvl; i++) {
cardsList.add(new Cards(Constants.imageNumber[drawCard[i]], drawId[i], cardScore[i]));
}现在我只想为 cardScore[i] 更新 values。我怎样才能做到这一点？
回答1
为您的 Cards 类创建设置器，然后您可以在使用 https://docs.oracle.com/javase/8/docs/api/java/util/List.html#get-int- 后调用这些设置器以获取特定索引处的卡片。
public class Cards implements Comparable<Cards>{
// other methods omitted for brevity...
public void setCardScore(int cardScore){
this.cardScore = cardScore;
}
}
// Usage:
cardsList.get(i).setCardScore(newCardScore);