Помогите мне исправить код.

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Привет, кодеры. У меня тут есть несколько кодов. Я попытался решить этот вопрос в книге "как программировать Java". Я суммировал этот вопрос ниже:

You are required to implement the following design as well as a main() method in another class to test your implementation:
Implement the hierarchy below where
- MyShape is an abstract class with an abstract Draw method,
- MyBoundedShape is an abstract class with an abstract GetArea method,
- MyLine, MyOval, MyRectangle are concrete classes
In the main() method,
- Ask the user to select 5 shapes and input their dimension
- Draw selected shapes
- Compute and show the area of selected shapes if they are a bounded shape

Когда я запустил код, он не показывал область или вычисленную область. Помоги мне это исправить. Кстати, спасибо.

Что я уже пробовал:

Класса MyShape

public abstract class MyShape 
{
	public abstract void Draw();
	

}

Класс функцию myline

public class Myline extends MyShape 
{
private int length;
public Myline (int length)
{
	length=0;
}
public void setlength( int length )
 {
 length = 0; 
 } 


 public int getlength()
 {
 return length;
 } 
public void Draw()
{
	System.out.printf("Drawing a line with the length",getlength());
}
}

Класс Myextendedshape

public abstract class MyextendedShape extends MyShape 
{
	protected double area;
	public abstract double getArea();

}

Класс Myoval

public class Myoval extends MyextendedShape
{
	private double Line1;
	private double Line2;
	public void Draw() {
        System.out.println("I am drawing  a Oval");
    }

     Myoval()
    {
        Line1= 0.0;
        Line2 = 0.0;        
    }

    Myoval(double Line1, double Line2){
        this.Line1 =Line1;
        this.Line2 = Line2;
    }



    public double getLine1() {
        return Line1;
    }

    public void setLine1(double Line1) {
        this.Line1 = Line1;
    }

    public double getLine2() {
        return Line2;
    }

    public void setLine2(double Line2) {
        this.Line2 = Line2;
    }

    @Override
    public double getArea() {
        return calculateArea();
    }

    
    private double calculateArea(){
        return area = 3.14*Line1 * Line2;
    }

    public String toString(){
        return "The Line number 1 of the oval is: " + Line1 + " and the Line number 2 is: " + Line2 + ", "
                + "and the area is: " + getArea();
    }

}

Мой класс прямоугольника

public class MyRectangle extends MyextendedShape {
    private double length, width;

    public void Draw() {
        System.out.println("I am drawing  a Rectangle");
    }

    MyRectangle()
    {
        length= 0.0;
        width = 0.0;        
    }

    MyRectangle(double length, double width){
        this.length =length;
        this.width = width;
    }



    public double getLenght() {
        return length;
    }

    public void setLength(double length) {
        this.length = length;
    }

    public double getWidth() {
        return width;
    }

    public void setWidth(double width) {
        this.width = width;
    }

    @Override
    public double getArea() {
        return calculateArea();
    }

   
    private double calculateArea(){
        return area = width * length;
    }

    public String toString(){
        return "The width of the rectangle is: " + width + " and the length is: " + length + ", "
                + "and the area is: " + getArea();
    }

}

Тест

public class test {
	 public static void main(String [] args) {
		 
		 MyShape s = new Myline(6);
		 s.Draw();
		 
		 s =  new Myoval(4.0, 5.0);
		 s.Draw();

	        s = new MyRectangle(4.0,6.0);
                s.Draw();

	    }
}

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