info-java/Technikladen/StorageManager.java

import java.util.ArrayList;

public class StorageManager {
	private ArrayList<Product> storageProducts;
	public StorageManager() {
		this.storageProducts = new ArrayList<Product>;
	}
	public void addProduct(Product product) {
		this.storageProducts.add(product);
	}
	public ArrayList<Product> getStorage() {
		return this.storageProducts;
	}
	public void increaseStorage(int id, int amt) {
		this.getProductByID(id).increaseAmount(amt);		
	}
	public Product getProductByID(int id) {
		for (Product product : this.storageProducts) {
			if (product.getID() == id) {
				return product;
			}
		}
		return new Product(-1, "", 0, 0);
	}
}