package com.jun.base.map;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ListRe {

    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        list.add("a");

        Map<String,String> map = new HashMap<>();

        map.put("a","1");

        System.out.println(map);

    }
}
