java. Консольный ввод.

import java.util.*;

public class ConsoleIOSample {
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);

System.out.print("Username: ");

String username = scanner.nextLine();

System.out.print("Password: ");
String password = scanner.nextLine();

System.out.print("What is 2 + 2: ");
int result = scanner.nextInt();

if (username.equals("admin") && password.equals("secret") && result ==  4) {

System.out.println("Welcome to Java Application");

} else {

System.out.println("Invalid username or password, access denied!");
}
}
}