Хелп

package com.javarush.task.task18.task1828; /* Прайсы 2 */ import java.io.*; import java.util.ArrayList; public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String fileName = reader.readLine(); reader.close(); if (!(args.length==0)){ ArrayList <String> goods = new ArrayList<>(); BufferedReader bufReader = new BufferedReader(new FileReader(fileName)); while (bufReader.ready()) { //full fill the list any case goods.add(bufReader.readLine()); } switch (args[0]) { case "-u": BufferedWriter writer1 = new BufferedWriter(new FileWriter(fileName)); StringBuilder stringBuilder = new StringBuilder(); for (int i = 0; i < goods.size(); i++) { //searching for good with ID needed if (Integer.parseInt(goods.get(i).substring(0, 8).trim()) == Integer.parseInt(args[1])) stringBuilder.append(args[1]); //id added for (int j = stringBuilder.length(); j < 8; j++) { stringBuilder.append(" "); } stringBuilder.append(args[2]); //productName added for (int j = stringBuilder.length(); j < 38; j++) { stringBuilder.append(" "); } stringBuilder.append(args[3]); //price added for (int j = stringBuilder.length(); j < 46; j++) { stringBuilder.append(" "); } stringBuilder.append(args[4]); //quantity added for (int j = stringBuilder.length(); j <50 ; j++) { stringBuilder.append(" "); } goods.set(i, stringBuilder.toString()); } for (int i = 0; i < goods.size(); i++) { //writing the renewed date to the file writer1.write(goods.get(i) + '\n'); } writer1.close(); case "-d": BufferedWriter writer2 = new BufferedWriter(new FileWriter(fileName)); for (int i = 0; i < goods.size(); i++) { if (Integer.parseInt(goods.get(i).substring(0, 8).trim()) == Integer.parseInt(args[1])) goods.remove(i); } for (int i = 0; i < goods.size(); i++) { writer2.write(goods.get(i) + '\n'); } writer2.close(); } bufReader.close(); } } } //if (goods.get(i).startsWith(args[0])){ //if ID was found // id = Integer.parseInt(bufReader.readLine().substring(0, 8).trim()); // // if (id == Integer.parseInt(args[1])) { // String // }