public static Connection getPostgresConnection() {
            try {
                DriverManager.registerDriver((Driver)

Class.forName("org.postgresql.Driver").newInstance());

                StringBuilder url = new StringBuilder();

                url.
                        append("jdbc:postgresql://").        //db type
                        append("localhost:").           //host name
                        append("5432/").                //port
                        append("javaDB?").          //db name
                        append("user=postgres&").          //login
                        append("password=saw123");       //password

                System.out.println("URL: " + url + "n");

                Connection connection = DriverManager.getConnection(url.toString());
                return connection;
            } catch (SQLException | InstantiationException | IllegalAccessException | ClassNotFoundException e) {
                e.printStackTrace();
            }
            return null;
        }

Connection connection = DriverManager.getConnection(url.toString());