Day 18: using Scanner.findAll to get all the download links from a json file.

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import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.util.regex.MatchResult;

class Day18 {
    public static void main(String[] args) {
        File file = new File("/home/mohibulhasan/Downloads/data.json");

        String urlRegex = "\"(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]\"";
        String propertyName = "\"downloadLink\":\"";

        try (Scanner scanner = new Scanner(file)) {
            scanner.findAll(propertyName + urlRegex)
                .map(MatchResult::group)
                .forEach(System.out::println);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}