public class Server {

    private static final String url = "jdbc:postgresql://localhost/test";
    private static final String login = "postgres";
    private static final String password = "12345";

    public static void main(String[] args) throws SQLException {

        System.out.println("Server is listening");
        While (true){
        long start = System.currentTimeMillis();
        Connection connection = DriverManager.getConnection(url, login, password);
        long end = System.currentTimeMillis();
        System.out.println(end-start);
        }
    }
}