package singleton;

public class Main {
    public static void main(String[] args) {
        System.out.println("=== Singleton Pattern Demo ===\n");

        DatabaseConnection c1 = DatabaseConnection.getInstance();
        DatabaseConnection c2 = DatabaseConnection.getInstance();
        DatabaseConnection c3 = DatabaseConnection.getInstance();

        System.out.println("\nAll three references same instance? " + (c1 == c2 && c2 == c3));

        System.out.println(c1.executeQuery("SELECT * FROM users"));
        System.out.println(c2.executeQuery("SELECT * FROM orders"));
        System.out.println(c3.executeQuery("SELECT COUNT(*) FROM products"));

        System.out.println("\nTotal queries: " + c1.getQueryCount());
    }
}