В чём проблема?
package com.javarush.task.task19.task1918;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.parser.Parser;
import org.jsoup.select.Elements;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
/*
Знакомство с тегами
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String fileName = reader.readLine();
BufferedReader fr = new BufferedReader(new FileReader(fileName));
StringBuilder context = new StringBuilder();
while (fr.ready()) {
String line = fr.readLine();
context.append(line);
}
Document document = Jsoup.parse(context.toString(), "", Parser.xmlParser());
Elements elements = document.select(args[0]);
elements.forEach(System.out::println);
fr.close();
reader.close();
}
}