如何为特定对象创建哈希映射 [英] How to create a hashmap for a specific object

问题描述

编辑：
@Oscar Lopez

@Oscar Lopez

我已经添加了您指定的代码，现在有以下代码：
import java.util。 HashMap的;
import java.util.Map;

I have added the code you specified, and now have the following: import java.util.HashMap; import java.util.Map;

public class Character{
    public String name;

    private HashMap<String, String> stats;

    public Character(String charName){
        name = charName;

        stats.put("Strength", "5");
        stats.put("Dexterity", "5");
        stats.put("Constitution", "5");
        stats.put("Intelligence", "5");
        stats.put("Strength", "5");
        stats.put("Wisdom", "5");
    }

    public String getStat(String name) {
        return stats.get(name);
    }

    public static void main(String[] arguments){
        Character tanis = new Character("Tanis");
        System.out.println(tanis.getStat("Dexterity"));             
    }
}

它似乎正确编译，但它不会不喜欢我试图把 stats.put 的东西加入到hashmap中，我该如何去做这件事？

And it seems to be compiling correctly, but it doesn't like the way I am trying to stats.put things into the hashmap, how should I go about doing this?

import java.util.HashMap;

public class Character{
    public String name;


    private static HashMap<String, String> stats;

    public Character(String charName){
        name = charName;
        stats = new HashMap<String, String>();
        stats.put("Strength", "5");
        stats.put("Dexterity", "5");
        stats.put("Constitution", "5");
        stats.put("Intelligence", "5");
        stats.put("Strength", "5");
        stats.put("Wisdom", "5");
    }

    public String getStat(String statName) {
        return stats.get(statName);
    }

    public static void changeStat(Character character, String statName, String newStatValue) {
        character.stats.put(statName, newStatValue);
    }

    public static void main(String[] arguments){
        Character tanis = new Character("Tanis");
        System.out.println(tanis.getStat("Dexterity"));

        Character xander = new Character("Xander");
        changeStat(xander, "Dexterity", "7");
        System.out.println(xander.getStat("Dexterity"));    
        System.out.println(tanis.getStat("Dexterity"));                 
    }
}

//Prints out
//5
//7
//7

为什么tanis.getStat变为7？

Why is tanis.getStat changing to 7?

推荐答案

在 Character 类中声明 HashMap 作为一个属性，那么你可以像你一样访问它打算：

Declare the HashMap as an attribute in the Character class, then you can access it like you intend:

public class Character {
    private HashMap<String, String> stats;
    public String getStat(String name) {
        return stats.get(name);
    }
}

// elsewhere
Character tanis = new Character("Tanis");
System.out.println(tanis.getStat("Dexterity"));

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