[英]How to use a HashMap returned from a method
這里我有一個程序在一個方法中創建一個 HashMap
import java.util.HashMap;
class Evan {
public HashMap<String,Double> abilities_get() {
HashMap<String,Double> abilities = new HashMap<String,Double>();
abilities.put("stealth", 1.5);
abilities.put("strength", 1.2);
abilities.put("accuracy", 1.0);
abilities.put("intelligence", 2.0);
return abilities;
}
}
public class Main {
public static void main(String[] args) {
Evan evan = new Evan();
evan.abilities_get();
abilities.get("stealth");
}
}
由於在主要方法中找不到“能力”,因此該程序不起作用。 我該怎么做才能在主 function 中使用我的 HashMap。
class Evan {
public HashMap<String,Double> abilities_get() {
HashMap<String,Double> abilities = new HashMap<String,Double>();
abilities.put("stealth", 1.5);
abilities.put("strength", 1.2);
abilities.put("accuracy", 1.0);
abilities.put("intelligence", 2.0);
return abilities;
}
}
class Main {
public static void main(String[] args) {
Evan evan = new Evan();
evan.abilities_get();
Double stealth = evan.abilities_get().get("stealth");
System.out.println(stealth);
}
}
試試看
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