java创建一个包含矩形和整数的数组

Question

private Array<Rectangle> livinglamas;

我希望这个数组为每个矩形包含一个整数。这个整数应该在spawnLama（）中指定，这样每个矩形都包含自己的值。我该怎么做

private void spawnLama() {
    Rectangle livinglama = new Rectangle();

    livinglama.x = MathUtils.random(-800, -400 - 64);
    livinglama.y = 0;
    livinglama.width = 64;
    livinglama.height = 64;

    livinglamas.add(livinglama);



    lastLamaTime = TimeUtils.nanoTime();
}

和

@Override
    public void render() {

    elapsedTime += Gdx.graphics.getDeltaTime();
    if(TimeUtils.nanoTime() - lastLamaTime > 1000000000L) spawnLama();


    Iterator<Rectangle> iter = livinglamas.iterator();
    while(iter.hasNext()) {
        Rectangle livinglama = iter.next();
        livinglama.x += LamaXBewegung * Gdx.graphics.getDeltaTime();
        if(livinglama.y + 64 < -575) iter.remove();
    }
   batch.begin();

    for(Rectangle livinglama: livinglamas) {
        batch.draw(animation.getKeyFrame(elapsedTime, true), livinglama.x, livinglama.y);
    }
    elapsedTime += Gdx.graphics.getDeltaTime();

Answer 1

只需创建一些包装，将矩形和整数连接起来：

public class DataHolder {
    public final Rectangle rect;
    public final int i;

    public DataHolder(Rectangle rect, int i) {
        this.rect = rect;
        this.i = i;
    }
} 

然后创建数据持有者的数组或arraylist：

// array of dataholders (fixed size)
DataHolder[] arr = new DataHolder[size];
arr[0] = new DataHolder(someRectangle, someInteger);

// arraylist of dataholders (dynamically expandable size) 
ArrayList<DataHolder> arrlist = new ArrayList<>();
arrlist.add(new DataHolder(someRectangle, someInteger));

Answer 2

将其子类化，并使用子类而不是矩形：

public class RectangleWithInt extends Rectangle {
    public int value;
}

或者使用Libgdx的ArrayMap。与Java的Map不同，您可以有重复的键，就像Array一样，它是按顺序排列的：

private ArrayMap<Rectangle, Integer> livinglamas;

//...

livinglamas.put(livinglama, someInt);


//...
Iterator<Entry<Rectangle, Integer>> iter = livinglamas.iterator();
while (iter.hasNext()){
    Entry<Rectangle, Integer> entry = iter.next();
    Rectangle lama = entry.key;
    int value = entry.value;
    //...
}