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| interface Shape {
void draw();
}
class Rectangle implements Shape {
@Override
public void draw() {
System.out.println("Shape: Rectangle");
}
}
class Circle implements Shape {
@Override
public void draw() {
System.out.println("Shape: Circle");
}
}
abstract class ShapeDecorator implements Shape {
protected Shape decoratedShape;
public ShapeDecorator(Shape decoratedShape) {
this.decoratedShape = decoratedShape;
}
public void draw() {
decoratedShape.draw();
}
}
class RedShapeDecorator extends ShapeDecorator {
public RedShapeDecorator(Shape decoratedShape) {
super(decoratedShape);
}
@Override
public void draw() {
decoratedShape.draw();
setRedBorder(decoratedShape);
}
private void setRedBorder(Shape decoratedShape) {
System.out.println("Border Color: Red");
}
}
public class DecoratorPatternDemo {
public static void main(String[] args) {
Shape circle = new Circle();
ShapeDecorator redCircle = new RedShapeDecorator(new Circle());
ShapeDecorator redRectangle = new RedShapeDecorator(new Rectangle());
System.out.println("Circle with normal border");
circle.draw();
System.out.println("\nCircle of red border");
redCircle.draw();
System.out.println("\nRectangle of red border");
redRectangle.draw();
}
}
|