Java倉庫管理システムの保管場所管理・在庫検索機能

import java.util.ArrayList;
import java.util.List;

public class Warehouse {
    private List<String> locations;

    public Warehouse() {
        this.locations = new ArrayList<>();
    }

    public void addLocation(String location) {
        locations.add(location);
    }

    public void removeLocation(String location) {
        locations.remove(location);
    }

    public void updateLocation(String oldLocation, String newLocation) {
        int index = locations.indexOf(oldLocation);
        locations.set(index, newLocation);
    }
}

import java.util.HashMap;
import java.util.Map;

public class Inventory {
    private Map<String, Integer> stock;

    public Inventory() {
        this.stock = new HashMap<>();
    }

    public void addProduct(String product, int quantity) {
        if (stock.containsKey(product)) {
            int currentQuantity = stock.get(product);
            stock.put(product, currentQuantity + quantity);
        } else {
            stock.put(product, quantity);
        }
    }

    public int getStock(String product) {
        return stock.getOrDefault(product, 0);
    }
}