class invoice{
public void printInvoice(){
System.out.println ( "This is the content of the invoice!");
}
}
class Decorator extends Invoice {
protected Invoice ticket;
public Decorator(lnvoice t){
ticket = t;
}
public void printInvoice(){
if(ticket != null)
（1）ticket.printInvoice() ;
}
}
class HeadDecorator extends Decorator{
public HeadDecorator(lnvoice t){
super(t);
}
public void printInvoice (){
Systent.out.println( "This is the header of the invoice! ");
（2） ticket.printInvoice();
}
}
class FootDecorator extends Decorator {
public FootDecorator(Invoice t){
super(t);
}
public void printlnvoice(){
（ 3） ticket.printInvoice();
Systent.out.println( "This is the footnote of the invoice! ");
}
}
Class test {
public static void main(String[] args){
Invoice t =new Invioce();
Invoice ticket;
ticket= （4） new FootDecorator(new HeadDecorator(t));
ticket.printInvoice();
Systent.out.println(“------------------“);
ticket= （5） new FootDecorator(new HeadDecorator(new Decorator(null)));
ticket.printInvoice();
}
}
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1. Abstract
2. String getDescription()
3. Abstract int cost().
4. Beverage beverage.
5. beverage.
6. Beverage
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class Pizza {
private String parts；
public void setParts(String parts) { this.parts = parts;}
public String toString() { return this.parts; }
}
abstract class PizzaBuilder {
protected Pizza pizza;
public Pizza getPizza() { return pizza; }
public void createNewPizza() { pizza = new Pizza(); }
public (1) ;
}
class HawaiianPizzaBuilder extends PizzaBuilder {
public void buildParts() { pizza.setParts("cross + mild +ham&pineapp1e”};
}
class SpicyPizzaBuilder extends PizzaBuilder {
public void buildParts() { pizza.setParts("pan baked + hot +pepperoni&salami"); }
}
class Waiter {
private PizzaBuilder pizzaBuilder;
public void setPizzaBuilder(PizzaBuilder pizzaBuilder) { /*
设置构建器*/
(2) ;
}
public Pizza getPizza(){ return pizzaBuilder.getPizza(); }
public void construct() { /*构建*/
pizzaBuilder.createNewPizza();
(3) ;
}
}
Class FastFoodOrdering {
public static viod mainSting[]args) {
Waiter waiter = new Waiter();
PizzaBuilder hawaiian_pizzabuilder = new
HawaiianPizzaBuilder();
(4) ;
(5) ;
System.out.println("pizza: " + waiter.getPizza());
}
}
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