外观模式 -- 设计模式

package day0319.FacadePattern;

public class Demo{

    public static void main(String[] args){

        ShapeMaker shapeMaker = new ShapeMaker();

        shapeMaker.drawCircle();
        shapeMaker.drawRectangle();
        shapeMaker.drawSquare();
    }
}

class ShapeMaker {

    Circle circle;
    Rectangle rectangle;
    Square square;

    public ShapeMaker(){
        circle = new Circle();
        rectangle = new Rectangle();
        square = new Square();
    }

    public void drawCircle() {
        circle.draw();
    }

    public void drawSquare() {
        square.draw();
    }

    public void drawRectangle() {
        rectangle.draw();
    }
}

interface Shape {
    void draw();
}

class Circle implements Shape {

    @Override
    public void draw(){
        System.out.println("画了一个圆");
    }
}
class Rectangle implements Shape {

    @Override
    public void draw(){
        System.out.println("画了一个四边形");
    }
}

class Square implements Shape {

    @Override
    public void draw(){
        System.out.println("画了一个矩形");
    }
}