public static Connection ConnectDB() {

    try {
    DriverManager.registerDriver(new com.microsoft.sqlserver.jdbc.SQLServerDriver());
    Connection conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;user=sa;password=secret");
            System.out.println("Connected");
        return conn;
    } catch (Exception e) {
        System.err.println(e.getMessage());
        e.printStackTrace();
        System.out.println("Database connection error.");
        return null;
    }
}

String dbURL = "jdbc:sqlserver://localhost\sqlexpress;user=sa;password=secret";