InventorySystem.java

import java.util.*;

class Item {
    private String name;
    private int quantity;
    private double price;

    public Item(String name, int quantity, double price) {
        this.name = name;
        this.quantity = quantity;
        this.price = price;
    }

    public String getName() {
        return name;
    }

    public int getQuantity() {
        return quantity;
    }

    public double getPrice() {
        return price;
    }

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

    public String toString() {
        return "Item{name='" + name + "', quantity=" + quantity + ", price=" + price + "}";
    }
}

class Inventory {

    private List<Item> items;

    public Inventory() {
        items = new ArrayList<>();
    }

    public void addItem(Item item) {
        items.add(item);
        System.out.println("Item added successfully: " + item);
    }

    public void removeItem(String name) {
        Item itemToRemove = null;

        for (Item item : items) {
            if (item.getName().equalsIgnoreCase(name)) {
                itemToRemove = item;
                break;
            }
        }

        if (itemToRemove != null) {
            items.remove(itemToRemove);
            System.out.println("Item removed successfully.");
        } else {
            System.out.println("Item not found in inventory.");
        }
    }

    public void viewItems() {
        if (items.isEmpty()) {
            System.out.println("Inventory is empty.");
        } else {
            System.out.println("\nInventory items:");
            for (Item item : items) {
                System.out.println(item);
            }
        }
    }
}

public class InventorySystem {

    public static void main(String[] args) {

        Inventory inventory = new Inventory();
        Scanner scanner = new Scanner(System.in);
        boolean exit = false;

        while (!exit) {

            System.out.println("\nInventory System");
            System.out.println("1. Add Item");
            System.out.println("2. Remove Item");
            System.out.println("3. View Items");
            System.out.println("4. Exit");

            System.out.print("Enter choice: ");
            int choice = scanner.nextInt();
            scanner.nextLine();

            switch (choice) {

                case 1:
                    System.out.print("Enter item name: ");
                    String name = scanner.nextLine();

                    System.out.print("Enter quantity: ");
                    int quantity = scanner.nextInt();

                    System.out.print("Enter price: ");
                    double price = scanner.nextDouble();
                    scanner.nextLine();

                    Item item = new Item(name, quantity, price);
                    inventory.addItem(item);
                    break;

                case 2:
                    System.out.print("Enter item name to remove: ");
                    String removeName = scanner.nextLine();
                    inventory.removeItem(removeName);
                    break;

                case 3:
                    inventory.viewItems();
                    break;

                case 4:
                    exit = true;
                    System.out.println("Exiting Inventory System.");
                    break;

                default:
                    System.out.println("Invalid choice.");
            }
        }

        scanner.close();
    }
}