Validate correct format for coordinate using REGEX

Question

i've been trying to validate the correct format for coordinate. Currently i want to save the coordinate. But when the format is wrong, the markers wont appear on my map.

This is the some of my sample code.

String latlon = "3.169054, 101.714108";
        String regex_coords = "/\\((\\-?\\d+\\.\\d+), (\\-?\\d+\\.\\d+)\\)/";
        Pattern compiledPattern2 = Pattern.compile(regex_coords, Pattern.CASE_INSENSITIVE);
        Matcher matcher2 = compiledPattern2.matcher(latlon);
        while (matcher2.find()) {
            System.out.println("Is Valid Map Coordinate: " + matcher2.group());
        }

I want the user to be able to save this format only "3.169054, 101.714108" with the comma.

Can anyone help me build the regex to valid this format?

Thanks all

Answer 1

This should work for you:

([+-]?\d+\.?\d+)\s*,\s*([+-]?\d+\.?\d+)

Online RegexPlanet Demo: http://fiddle.re/20pm

This permits any coordinate to be a number which optionally starts with + or -. Number can be either integer or double (but dot must be enclosed with digits if present).

Finally, you can get latitude and longitude as group1 and group2.