Что не так?

package com.javarush.task.task18.task1828; import java.io.*; import java.nio.charset.StandardCharsets; import java.util.ArrayList; /* Прайсы 2 */ public class Solution { public static void main(String[] args) throws IOException { ArrayList<String> lines = new ArrayList<>(); if (args.length != 0) { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String file = reader.readLine(); reader.close(); reader = new BufferedReader(new FileReader(file)); while (reader.ready()) { lines.add(reader.readLine()); } // System.out.println(lines); reader.close(); // String s = "-u"; if (args[0].equals("-u")) { update(args[1], args[2], Double.parseDouble(args[3]), Integer.parseInt(args[4]), lines); } else if (args[0].equals("-d")) { delete(args[2], lines); } FileOutputStream fos = new FileOutputStream(file); for (String line : lines) fos.write((line + "\n").getBytes(StandardCharsets.UTF_8)); // if (s.equals("-u")) { // update(String.valueOf(198479), "Шорты", Double.parseDouble("164.3"), Integer.parseInt("20")); // for (String line : lines) fos.write((line + "\n").getBytes(StandardCharsets.UTF_8)); // } else if (s.equals("-d")) { // delete(String.valueOf(19847983)); // for (String line : lines) fos.write((line + "\n").getBytes(StandardCharsets.UTF_8)); // } // // System.out.println(lines); fos.close(); } } private static void update(String id, String name, double price, int quantity, ArrayList<String> lines) { lines.set(searchId(id, lines), setLimit(id, 8) + setLimit(name, 30) + setLimit(String.valueOf(price), 8) + setLimit(String.valueOf(quantity), 4).trim()); } private static void delete(String id, ArrayList<String> lines) { lines.remove(searchId(id, lines)); } private static String setLimit(String str, int limit) { String limitedStr = str; if (str.length() < limit) { for (int i = str.length(); i < limit; i++) { limitedStr += " "; } } else if (str.length() > limit) { limitedStr = str.substring(0, limit); } return limitedStr; } private static int searchId(String id, ArrayList<String> lines) { int index = 0; for (String string : lines) { if (string.substring(0, 8).trim().equals(id)) index = lines.indexOf(string); } return index; } }