Подскажите пожалуйста, что не так
package com.javarush.task.task19.task1918;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/*
Знакомство с тегами
*/
public class Solution {
public static void main(String[] args) throws IOException {
String fileName = "";
try (BufferedReader reader = new BufferedReader(new InputStreamReader(System.in))) {
fileName = reader.readLine();
}
String strFile;
StringBuilder htmlBuilder = new StringBuilder();
try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
while ((strFile = reader.readLine()) != null) {
htmlBuilder.append(strFile);
}
}
String htmlFile = htmlBuilder.toString();
String tag = args[0];
Pattern pattern1 = Pattern.compile("<" + tag + ".*?<" + tag + ".*?</" + tag + ">.*?</" + tag + ">|<" + tag + ".*?</" + tag + ">");
Matcher matcher1 = pattern1.matcher(htmlFile);
while (matcher1.find()) {
String result = htmlFile.substring(matcher1.start(), matcher1.end());
String result2 = htmlFile.substring(matcher1.start() + 1, matcher1.end());
System.out.println(result);
Matcher matcher2 = pattern1.matcher(result2);
while (matcher2.find()) {
System.out.println(result2.substring(matcher2.start(), matcher2.end()));
}
}
}
}