Не понимаю
package com.javarush.task.task10.task1019;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
/*
Функциональности маловато!
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
HashMap<String, Integer> map = new HashMap<String, Integer>();
while (true) {
String id = reader.readLine();
if (id == null || id.isEmpty()) {break;}
String name = reader.readLine();
if (name == null || name.isEmpty()) {map.put(name,null);break;}
int ik = Integer.parseInt(id);
map.put(name, ik);
}
for(Map.Entry<String, Integer> pair : map.entrySet()){
System.out.println(pair.getValue() + " " + pair.getKey()) ;
}
}
}