Question

我正在做一个大学项目。阻止我几乎所有进展的主要问题之一是用arraylist内容填充设置器。 arraylist是object类型。这是代码：

import java.util.ArrayList;
import java.util.List;

public class Whisky {

    private String name;
    private String description;
    private int quantity;


    public Whisky(String nm, String desc, int quant) {
        this.name = nm;
        this.description = desc;
        this.quantity = quant;


        List<Object> WhiskyList = new ArrayList<Object>() ;
        WhiskyList.add("Balvenie");
        WhiskyList.add("triple cask 12.  Matured in the three most traditional types of cask – first-fill bourbon, refill bourbon and sherry");
        WhiskyList.add(10);
        WhiskyList.add("Glenfiddich");
        WhiskyList.add("Reserve Cask. This Whisky has been matured exclusively in Spanish sherry casks");
        WhiskyList.add(10);
        WhiskyList.add("Laphroig");
        WhiskyList.add("Laphroig Four Oak. Matured in four different types of cask: ex-bourbon barrels, small quarter casks, virgin American oak barrels and European oak hogsheads.");
        WhiskyList.add(10);

   }   


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public int getQuantity() {
        return quantity;
    }

     public void setQuantity(int quantity) {
        this.quantity= quant;
    }
}

因此，基本上我想做的是运行一个遍历arraylist.size（）的for循环，并针对其执行的每个“步骤”，将内容放入正确的setter中。那可能吗？

Answer 1

我认为您正在尝试建立威士忌酒实例的初始列表。有很多方法可以做到这一点。这是一个使用静态列表并使用静态方法填充它的方法（在类加载时运行一次）。

public class Whisky {

  public static final List<Whisky> WhiskyList = new ArrayList<Whisky>();

  static {
    WhiskyList.add(new Whisky("Balvenie",
                              "triple cask 12.  Matured in the three most traditional types of cask – first-fill bourbon, refill bourbon and sherry",
                              10));
    WhiskyList.add(new Whisky("Glenfiddich",
                              "Reserve Cask. This Whisky has been matured exclusively in Spanish sherry casks",
                              10));
    WhiskyList.add(new Whisky("Laphroig",
                              "Laphroig Four Oak. Matured in four different types of cask: ex-bourbon barrels, small quarter casks, virgin American oak barrels and European oak hogsheads.",
                              10));
  }

  private String name;
  private String description;
  private int quantity;

  public Whisky(String nm, String desc, int quant) {
    this.name = nm;
    this.description = desc;
    this.quantity = quant;
  }

  // finish with getters and settings
}

Answer 2

您的类的构造函数应仅初始化该类的字段。 WhiskeyList变量最有可能应采用main()方法。但是在您这样做之前，我建议编写一个main()来创建一个单独的Whiskey实例。

通过循环arraylist来填充setter

2 个答案: