Decorator mode in Design Mode

Decorator mode in Design Mode

The decorator mode is also called the packaging mode. It is an alternative to the inheritance relationship by extending the object functions in a transparent way to the client. The most typical example of using the decorator mode is the various Java IO streams.

<喎?http: www.bkjia.com kf ware vc " target="_blank" class="keylink"> VcD4KPHA + signature + CjxwPrPpz/PX6bz + signature/O907/Signature + 38zl1 + m8/r3Hyaujus6qs + signature/Signature + m8/Signature/PX6bz + 0 rvWwrXEvdO/Signature + Signature /WwOCho7i61PC + 38zltcTXsMrOoaM8L3A + Cjxicj4KPHA + signature + CjxwPjxzdHJvbmc + s + signature + CjxwPjxwcmUgY2xhc3M9 "brush: java; "> public interface Car {public void show ();}
Specific Component roles:

public class RunCar implements Car {@Overridepublic void show() {this.run();}public void run() {System.out.println("Run...");}}

Abstract decoration role:

public abstract class CarDecorator implements Car {private Car car;public CarDecorator(Car car) {this.car = car;}public Car getCar() {return car;}@Overridepublic abstract void show(); }

Specific decorative role 1:

public class FlyCarDecorator extends CarDecorator {public FlyCarDecorator(Car car) {super(car);}@Overridepublic void show() {this.getCar().show();this.fly();}public void fly() {System.out.println("Fly...");}}

Specific decorative role 2:

public class SwimCarDecorator extends CarDecorator {public SwimCarDecorator(Car car) {super(car);}@Overridepublic void show() {this.getCar().show();this.swim();}public void swim() {System.out.println("Swim...");}}

Client call test class:

public class ClientApp {public static void main(String[] args) {Car car = new RunCar();car.show();System.out.println("----------------");CarDecorator swimCar = new SwimCarDecorator(car);swimCar.show();System.out.println("----------------");CarDecorator flySwimCar = new FlyCarDecorator(swimCar);flySwimCar.show();}}

Although the above Code has no practical significance, you can also learn how to use the decorator mode.