2java示例
{
main([] args) {
Seller riceSeller RiceSeller();
Seller meatSeller MeatSeller();
OrderMenuItem riceOrder OrderRice();
OrderMenuItem meatOrder OrderMeat();
riceOrder.setSeller(riceSeller);
meatOrder.setSeller(meatSeller);
Waiter waiter Waiter();
waiter.setOrder(riceOrder);
waiter.Order();
waiter.setOrder(meatOrder);
waiter.Order();
}
}
{
OrderMenuItem order;
setOrder(OrderMenuItem order) {
.order order;
}
Order(){
.order.order();
}
}
{
sell();
}
Seller {
sell() {
System.out.println();
}
}
Seller {
sell() {
System.out.println();
}
}
{
Seller seller;
setSeller(Seller seller) {
.seller seller;
}
order();
}
OrderMenuItem {
order() {
.seller.sell();
}
}
OrderMenuItem {
order() {
.seller.sell();
}
}