public class ShapeFactory{
	public Shape getShape(String shapeType){
		if (shapeType == null) {
			return null;
		}
		switch(shapeType.toLowerCase()){
			case "circle":
				return new Circle();
			case "rectangle":
				return new Rectangle();
			case "square":
				return new Square();
		}
		
		return null;
	}
}