【Java代码】
import java.util.*;
(1) class Beverage { //饮料
String description = \
public (2) (){return description;}
public (3) ;
}
abstract class CondimentDecorator extends Beverage { //配料
(4) ;
}
class Espresso extends Beverage { //蒸馏咖啡
private final int ESPRESSO_PRICE = 25;
public Espresso() { description=\
public int cost() { return ESPRESSO_PRICE; }
}
class DarkRoast extends Beverage { //深度烘焙咖啡
private finalint DARKROAST_PRICE = 20;
public DarkRoast() { description = \
public int cost(){ rcturn DARKROAST PRICE; }
}
class Mocha extends CondimentDecorator { //摩卡
private final int MOCHA_PRICE = 10;
public Mocha(Beverage beverage) {
this.beverage = beverage;
}
public String getDescription() {
return beverage.getDescription0 + \
}
public int cost() {
return MOCHA_PRICE + beverage.cost();
}
}
class Whip extends CondimentDecorator { //奶泡
private finalint WHIP_PRICE = 8;
public Whip(Beverage beverage) { this.beverage = beverage; }
public String getDescription() {
return beverage.getDescription()+\
}
public int cost() { return WHIP_PRICE + beverage.cost(); }
}
public class Coffee {
public static void main(String args[]) {
Beverage beverage = new DarkRoast();
beverage=new Mocha( 5 );
beverage=new Whip ( 6 );
}
}
编译运行上述程序,其输出结果为:
DarkRoast, Mocha, Whip ¥38