题解 | #map简单应用#

import java.util.*;
import java.io.*;
public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String name = br.readLine();
        Map<Integer, String> map = new HashMap<Integer, String>();
        map.put(1, "Amy");
        map.put(2, "Joe");
        map.put(3, "Tom");
        map.put(4, "Susan");
        for (int i = 1; i < map.size() + 1; i++) {
            System.out.println(i + ":" + map.get(i));
        }
        map.put(5, name);
        map.remove(4);
        map.put(3, "Tommy");
        System.out.println();
         for(int i : map.keySet()) {
            System.out.println(i + ":" + map.get(i));
        }
        

    }
}