trim()

package com.javarush.task.task18.task1828;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

/*
Прайсы 2
*/

public class Solution {
    private static List<Product> productList = new ArrayList<>();
    private static String path;

    public static void main(String[] args) {
        if (args.length == 0) {
            return;
        }
        path = new Scanner(System.in).nextLine();
        readerProduct();
        switch (args[0]) {
            case "-u":
                try {
                    for (Product prod : productList) {
                        if (prod.getId() == Integer.parseInt(args[1])) {
                            prod.setProductName(args[2]);
                            prod.setPrice(Double.parseDouble(args[3]));
                            prod.setQuantity(Integer.parseInt(args[4]));
                        }
                    }
                } catch (NullPointerException exception) {
                    System.out.println("Данные введены не верно");
                }

            case "-d":
                for (Product prod : productList) {
                    try {
                        if (Integer.parseInt(args[1]) == prod.getId()) {
                            productList.remove(productList.indexOf(prod));
                            break;
                        }
                    } catch (NullPointerException exception) {
                        System.out.println("Введен не верный ИД " + prod.getId());
                    }
                }
        }
        writeProducts();
    }

    public static void writeProducts() {
        try (BufferedWriter writer = new BufferedWriter(new FileWriter(path))) {
            for (Product prod : productList
            ) {
                writer.write(prod.toString());
            }

        } catch (IOException exception) {
            exception.printStackTrace();
        }
    }

    public static void readerProduct() {
        try (BufferedReader reader = new BufferedReader(new FileReader(path))) {
            String prod;
            while (reader.ready()) {
                prod = reader.readLine();
                productList.add(new Product(Integer.parseInt(prod.substring(0, 7).trim()),
                        prod.substring(7, 36).trim(), Double.parseDouble(prod.substring(36, 44).trim()),
                        Integer.parseInt(prod.substring(44).trim())));
            }
        } catch (IOException exception) {
            exception.printStackTrace();
        }
    }

    public static class Product {
        private long id;
        private String productName;
        private Double price;
        private int quantity;

        public Product(long id, String productName, Double price, int quantity) {
            this.id = id;
            this.productName = productName;
            this.price = price;
            this.quantity = quantity;
        }

        public void setId(long id) {
            this.id = id;
        }

        public void setProductName(String productName) {
            this.productName = productName;
        }

        public void setPrice(Double price) {
            this.price = price;
        }

        public void setQuantity(int quantity) {
            this.quantity = quantity;
        }

        public long getId() {
            return id;
        }

        public String getProductName() {
            return productName;
        }

        public Double getPrice() {
            return price;
        }

        public int getQuantity() {
            return quantity;
        }

        @Override
        public String toString() {
            return String.format("%8d %30s %6.2f %4d"
                    , getId(), getProductName(), getPrice(), getQuantity());
        }
    }
}