public class Item { private String name; private int price; private int stock; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getPrice() { return price; } public void setPrice(int price) { this.price = price; } public int getStock() { return stock; } public void setStock(int stock) { this.stock = stock; } void sell(int amount) { this.setStock(this.getStock() - amount); } @Override public String toString() { return getName() + "" + getPrice() + "円(残り" + getStock() + "個)"; } }