题解 | #map简单应用#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner  = new Scanner(System.in);
        String name = scanner.next();
        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 : map.keySet()) {
            System.out.println(i + ":" + map.get(i));
        }
        
        System.out.println();
        
        map.put(5,name); // 添加
        map.remove(4);	// 删除
        map.replace(3,"Tommy");	// 修改
        
        for(int i : map.keySet()) {
            System.out.println(i + ":" + map.get(i));
        }
    }
}