collections i assess
Thu Apr 25 2024 05:21:35 GMT+0000 (Coordinated Universal Time)
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import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter the number of address:");
int n = scanner.nextInt();
scanner.nextLine(); // Consume newline left-over
Map<String, Map<String, Integer>> map = new HashMap<>();
for (int i = 0; i < n; i++) {
System.out.println("Enter the address:");
String[] address = scanner.nextLine().split(",");
String state = address[2];
String city = address[1];
if (!map.containsKey(state)) {
map.put(state, new HashMap<>());
}
if (!map.get(state).containsKey(city)) {
map.get(state).put(city, 0);
}
map.get(state).put(city, map.get(state).get(city) + 1);
}
List<String> states = new ArrayList<>(map.keySet());
Collections.sort(states);
System.out.println("Number of entries in city/state wise:");
for (String state : states) {
System.out.println("State:" + state);
List<String> cities = new ArrayList<>(map.get(state).keySet());
Collections.sort(cities);
for (String city : cities) {
System.out.println("City:" + city + " Count:" + map.get(state).get(city));
}
System.out.println();
}
}
}
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