I don't get what the verifier wants

Question about the task

Under discussion

When I run the tests, everything is correct, but maybe the verifier wants something else. A little help could be of great use to me.

CrUD for a table inside a file
Read a file name for CrUD operations from the console

The program runs with one of the following sets of arguments:
-u id productName price quantity
-d id

Argument values:
where id is 8 characters
productName is 30 characters
price is 8 characters
quantity is 4 characters
-u updates the data for the product with the specified id
-d performs the physical deletion of the product with the specified id (all data related to the passed id)

The file data is stored in the following order (without separating spaces):
id productName price quantity
Each data field is padded with spaces up to its length

Example:
19847 Swim trunks, blue 159.00 12 198479 Swim trunks, black with printe173.00 17 19847983Snowboard jacket with reflecti10173.991234

Requirements:

The program should read a file name for CrUD operations from the console.
When you run the program without arguments, the product list must remain unchanged.
When the program is started with the arguments "-u id productName price quantity", the product information in the file should be updated.
When the program is started with the arguments "-d id", the line for the product with the specified id should be removed from the file.
The file streams must be closed.

package com.codegym.task.task18.task1828; /* Prices 2 */ import java.io.*; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.Map; public class Solution { public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String name = reader.readLine(); reader.close(); reader = new BufferedReader(new FileReader(name)); HashMap<Integer, String> map = new HashMap<>(); while (reader.ready()) { String line = reader.readLine(); int id = Integer.parseInt(line.split(" ")[0]); map.putIfAbsent(id, line); } BufferedWriter writer = new BufferedWriter(new FileWriter(name)); if (args[0].equals("-u")) { Iterator<Map.Entry<Integer, String>> iterator = map.entrySet().iterator(); while (iterator.hasNext()) { Map.Entry<Integer, String> entry = iterator.next(); if (Integer.parseInt(args[1]) == entry.getKey()) { String newLine = String.format("%-8s%-30s%-8s%-4s", args[1], args[2], args[3], args[4]); map.replace(entry.getKey(), entry.getValue(), newLine); } } for (Map.Entry<Integer, String> entry : map.entrySet()) { writer.write(entry.getValue()); writer.newLine(); } } else if (args[0].equals("-d")) { Iterator<Map.Entry<Integer, String>> iterator = map.entrySet().iterator(); while (iterator.hasNext()) { Map.Entry<Integer, String> entry = iterator.next(); if (Integer.parseInt(args[1]) == entry.getKey()) { iterator.remove(); } } for (Map.Entry<Integer, String> entry : map.entrySet()) { writer.write(entry.getValue()); writer.newLine(); } } reader.close(); writer.close(); } }

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Weichen Ouyang

Level 25 , San Jose, United States

16 September 2019, 19:51

line23: int id = Integer.parseInt(line.split(" ")[0]); You can not use space to split "id" up, take a close look at example file line 3: "19847983Snowboard jacket with reflecti10173.991234" Besides, HashMap is not a good option to store lines here, because the order of item is arbitrary regarding the order of input. It will cause problems in the output. Use LinkedHashMap or ArrayList instead.