装饰者模式

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ICar.java

public interface ICar {void move();}//ConcreteComponent 具体构件角色(真实对象)class Car implements ICar {@Overridepublic void move() {System.out.println("陆地上跑！");}}//Decorator装饰角色class SuperCar implements ICar {protected ICar car;public SuperCar(ICar car) {super();this.car = car;}@Overridepublic void move() {car.move();}}//ConcreteDecorator具体装饰角色class FlyCar extends SuperCar {public FlyCar(ICar car) {super(car);}public void fly(){System.out.println("天上飞！");}@Overridepublic void move() {super.move();fly();}}//ConcreteDecorator具体装饰角色class WaterCar extends SuperCar {public WaterCar(ICar car) {super(car);}public void swim(){System.out.println("水上游！");}@Overridepublic void move() {super.move();swim();}}//ConcreteDecorator具体装饰角色class AICar extends SuperCar {public AICar(ICar car) {super(car);}public void autoMove(){System.out.println("自动跑！");}@Overridepublic void move() {super.move();autoMove();}}

Client.java

public class Client {public static void main(String[] args) {Car car  = new Car();car.move();System.out.println("增加新的功能，飞行----------");FlyCar flycar = new FlyCar(car);flycar.move();System.out.println("增加新的功能，水里游---------");WaterCar  waterCar = new WaterCar(car);waterCar.move();System.out.println("增加两个新的功能，飞行，水里游-------");WaterCar waterCar2 = new WaterCar(new FlyCar(car));waterCar2.move();//Reader r = new BufferedReader(new InputStreamReader(new FileInputStream(new File("d:/a.txt"))));//io流也用到了装饰模式}}

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