import java.util.HashMap;

import java.util.Map;

import java.util.Scanner;

public class MessageQueueExtractor {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

Map<String, String> messageQueues = new HashMap<>();

System.out.println("Enter message queue name (or 'done' to finish):");

while (true) {

String name = scanner.nextLine().trim();

if (name.equalsIgnoreCase("done")) {

break;

}

//Basic input validation: Check for empty names

if (name.isEmpty()) {

System.out.println("Invalid queue name. Please enter a valid name.");

continue;

}

//Basic input validation: Check for special characters (alphanumeric and underscore only)

if (!name.matches("[a-zA-Z0-9_]+")) {

System.out.println("Invalid queue name. Please use only alphanumeric characters and underscores.");

continue;

}

System.out.println("Enter queue value:");

String value = scanner.nextLine().trim();

// Basic input validation: Check for empty values

if (value.isEmpty()) {

System.out.println("Invalid queue value. Please enter a value.");

continue;

}

messageQueues.put(name, value);

}

System.out.println("\nExtracted Message Queues:");

for (Map.Entry<String, String> entry : messageQueues.entrySet()) {

System.out.println(entry.getKey() + ": " + entry.getValue());

}

scanner.close();

}

}