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