How to update a specific value in List<Class>?

Question

I need to update one data in my List<Cards>. Class Cards looks like this:

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);
}

In my MainActivity clas I initiated List cardsList = new ArrayList<>(); and filled it like this

                for (i = 0; i < lvl; i++) {
                cardsList.add(new Cards(Constants.imageNumber[drawCard[i]], drawId[i], cardScore[i]));
            }

Now I want to update values only for cardScore[i]. How can I do this?

My List has 3 variables in row. cardScore[i] is the last one — Otototo
– Otototo, Commented May 14, 2022 at 16:45
Your Cards class has private fields and not set methods, so you can't update the values. Add a set or update method to Cards; then find the card you want at cardsList.get(index) and call that method. — ewramner
– ewramner, Commented May 14, 2022 at 16:49

Unmitigated · Accepted Answer · 2022-05-14 16:50:09Z

1

Create setters for your Cards class, then you can call those setters after using List#get to get the card at a specific index.

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);

answered May 14, 2022 at 16:50

Unmitigated

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