тобто воно не прийме не в якому вигляді зокрема дефолтного.
package ua.javarush.task.task19.task1918;
import java.io.*;
import java.util.ArrayList;
import java.util.stream.Collectors;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.nodes.TextNode;
import org.jsoup.select.Elements;
/*
Знайомство з тегами
*/
public class Solution {
public static void main(String[] args) throws IOException {
args = new String[]{"span"};
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String fileName = reader.readLine();
reader.close();
BufferedReader readerFile = new BufferedReader(new FileReader(fileName));
String html = readerFile.lines().collect(Collectors.joining());
readerFile.close();
String targetTag = args[0];
Document doc = Jsoup.parseBodyFragment(html);
for (Element el : doc.body().getElementsByTag(targetTag)) System.out.println(el.outerHtml());
}
}