package com.day15.Map;
import java.util.HashMap;
import java.util.Map;
public class MapThree {
public static void main(String[] args) {
Map<String, Integer> ma=new HashMap<>();
ma.put("Kobe",20);
ma.put("KG",21);
ma.put("PP",22);
ma.put("Allen",23);
for(String key:ma.keySet()) {//相当于set<String> ks=ma.keySet();ma.keySet()是所有键的集合
System.out.println(key+"="+ma.get(key));//PP=22Kobe=20KG=21Allen=23
}
}
}