Подскажите, где ошибка?
package com.javarush.task.task08.task0829;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.HashMap;
import java.util.Map;
/*
Модернизация ПО
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
ArrayList address = new ArrayList();
HashMap map = new HashMap();
while (true)
{
String family = reader.readLine();
if (family.isEmpty())
break;
String sity = reader.readLine();
if (sity.isEmpty ())
break;
map.put (family, sity);
}
// Read the house number
String sityfinde = reader.readLine();
if (map.containsKey(sityfinde))
{
System.out.println(map.get (sityfinde));
}
int houseNumber = Integer.parseInt(reader.readLine());
if (0 <= houseNumber && houseNumber < address.size()) {
String familyName = address.get(houseNumber);
System.out.println(familyName);
}
}
}