Multivalued mapping: arraylistmultimap and hashmultimap

package org.example.testMultimap;

import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimap;

public class Main {
    public static void main(String[] args) {
        // {1=[1, 1]}
//        Multimap<Integer, String> multimap = ArrayListMultimap.create();
        // {1=[1]}
        Multimap<Integer, String> multimap = HashMultimap.create();


        multimap.put(1, "1");
        multimap.put(1, "1");


        System.out.println(multimap);
    }
}

/*
//  summary ： ArrayListMultimap HashMultimap Are Multivalued Mappings , value It's all an array , The key is whether the elements inside can be repeated 
 */