Java:动态填充数组(不是vector/ArrayList)

Question

我正在尝试找出是否有某种方法可以在不使用数组初始化的情况下动态填充类中的对象数组。我真的希望避免逐行填充数组。考虑到我这里的代码，这是可能的吗？

final class Attributes {

    private final int TOTAL_ATTRIBUTES = 7;

    Attribute agility;
    Attribute endurance;
    Attribute intelligence;
    Attribute intuition;
    Attribute luck;
    Attribute speed;
    Attribute strength;

    private Attributes[] attributes; //array to hold objects

    private boolean initialized = false;

    public Attributes() {
        initializeAttributes();
        initialized = true;

        store(); //method for storing objects once they've been initialized.

    }

    private void initializeAttributes() {
        if (initialized == false) {
            agility = new Agility();
            endurance = new Endurance();
            intelligence = new Intelligence();
            intuition = new Intuition();
            luck = new Luck();
            speed = new Speed();
            strength = new Strength();
        }
    }

    private void store() {
        //Dynamically fill "attributes" array here, without filling each element line by line.
    }
}

Answer 1

attributes = new Attributes[sizeOfInput];

for (int i=0; i<sizeOfInput; i++) {
    attributes[i] = itemList[i];
}

此外，仅供参考，您可以将对象添加到数组中，然后调用toArray()来获取对象的ArrayList。

Answer 2

有一个简短的数组初始化语法：

attributes = new Attribute[]{luck,speed,strength,etc};

Answer 3

 Field[] fields =  getClass().getDeclaredFields();
 ArrayList<Attrubute> attributesList = new ArrayList<Attrubute>();
 for(Field f : fields)
 {
     if(f.getType() == Attrubute.class)
     {
         attributesList.add((Attrubute) f.get(this));
     }
 }
 attributes = attributesList.toArray(new Attrubute[0]);