小编Nic*_*roz的帖子

我使用静态arraylist创建了一个Coin类,它存储了所创建的类的每个实例,但我需要用初始实例启动该列表,而且我没有想到如何在不添加它的情况下执行它(因为冗余代码) ), 有什么建议？

public class Coin {
    private static ArrayList<String> coinNames = new ArrayList<>();
    private static ArrayList<String> coinAbbreviations = new ArrayList<>(Arrays.asList("CLP"));
    private static ArrayList<Coin> coins =
            new ArrayList<>(Arrays.asList(new Coin("Pesos chilenos", "CLP", 1f, "CLP")));
    private static HashMap<String,Float> exchangeRates;
    private String coinName;
    private String coinAbbreviation;
    private Float coinValue;
    private String unit;


    public Coin(String coinName, String coinAbbreviation, Float coinValue, String unit) {
        assert !coinAbbreviations.contains(coinAbbreviation) : "Coin abbreviation already used";
        assert coinAbbreviations.contains(unit) : "Coin unit non existent.";
        assert !coinNames.contains(coinName) : "Coin name already used."; …