英文:
Is there a way to reuse a part of code to instantiate array-lists that hold different data types?
问题
以下是翻译好的部分：
我想要找到一种在我的Java代码中重用类似数组列表的方法。使每个数组列表不同的唯一因素是它们所容纳的数据类型。特别是在我的程序中，我有一个名为ActionDeck的类，它有一个实例变量数组列表，其中存储着对象ActionCard；还有另一个名为SalaryDeck的类，它有一个实例变量数组列表，其中存储着对象SalaryCard。这两个类都有相同的实例变量和方法。是否有一种方法，我可以拥有某种蓝图，在代码的一部分中实例化这两个Deck类，但它所持有的对象是不同的？它继承自的抽象Deck类仅具有相似的方法。我只是想要缩短代码量，因为我正在为其他牌组类重复这些代码，而且这似乎也是多余的。
public class SalaryDeck extends Deck {
private Deque<SalaryCard> salaryDeck;
private ArrayList<SalaryCard> temp;
public SalaryDeck () {
salaryDeck = new ArrayDeque<SalaryCard>();
temp = new ArrayList<SalaryCard>();
}
public class ActionDeck extends Deck {
// 用于动作卡牌组的实例变量
private Deque<ActionCard> actionDeck;
private ArrayList<ActionCard> temp;
/**
* 动作卡牌组对象的构造函数。它创建一个临时数组列表，以及一个用于将动作卡对象推入的双端队列。
*/
public ActionDeck() {
actionDeck = new ArrayDeque<ActionCard>();
temp = new ArrayList<ActionCard>();
}
我一直在考虑是否可以使用一个抽象类，但我不确定如何实现它。
非常感谢！
英文:
I wanted to find a way of reusing similar array lists in my code in Java. The only thing that makes each one different is the data type they hold. Particularly in my program I have a class ActionDeck that has an instance variable array list of object ActionCard and another class SalaryDeck that has an instance variable array list of object SalaryCard. Both of these classes have the same instance variables and methods. Is there a way I am able to have some kind of blueprint wherein I can just instantiate both Deck classes from one part of code but the object it holds is different? The abstract Deck class it extends from holds similar methods only. I just want to shorten the amount of code since I'm repeating these for other deck classes and it seems redundant too.
public class SalaryDeck extends Deck {
private Deque<SalaryCard> salaryDeck;
private ArrayList<SalaryCard> temp;
public SalaryDeck () {
salaryDeck = new ArrayDeque<SalaryCard>();
temp = new ArrayList<SalaryCard>();
}
public class ActionDeck extends Deck {
// Instance variables for an action card deck
private Deque<ActionCard> actionDeck;
private ArrayList<ActionCard> temp;
/**
* Constructor for an action card deck object. It creates a temporary
* array list, as well as a deque for pushing action card objects into.
*/
public ActionDeck() {
actionDeck = new ArrayDeque<ActionCard>();
temp = new ArrayList<ActionCard>();
}
I kept thinking I could use an abstract class but I'm not sure of how to implement it.
Thank you very much!
答案1
得分: 2
你使你的Deck类变成了泛型：
public abstract class Deck<C> {
protected final Deque<C> cards = new Deque<>();
}
public class ActionDeck extends Deck<ActionCard> {
}
英文:
You make your Deck class generic:
public abstract class Deck<C> {
protected final Deque<C> cards = new Deque<>();
}
public class ActionDeck extends Deck<ActionCard> {
}
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