import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
 
public class SimpleLoginSystem {
    public static void main(String[] args) {
        // Create a map to store user credentials (username and password)
        Map<String, String> userCredentials = new HashMap<>();
        userCredentials.put("user1", "password1");
        userCredentials.put("user2", "password2");
 
        // Create a Scanner object for user input
        Scanner scanner = new Scanner(System.in);
 
        // Prompt the user for login credentials
        System.out.print("Enter username: ");
        String username = scanner.nextLine();
 
        System.out.print("Enter password: ");
        String password = scanner.nextLine();
 
        // Check if the entered username exists and the password matches
        if (userCredentials.containsKey(username) && userCredentials.get(username).equals(password)) {
            System.out.println("Login successful. Welcome, " + username + "!");
        } else {
            System.out.println("Login failed. Invalid username or password.");
        }
 
        // Close the scanner
        scanner.close();
    }
}
 

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