New to abstract methods and classes, few issues

Hi there basically I'm having a few issues with this the circle class works fine as I've tried it in a test class. But the problem lies with when I try and inherit the circle get radius method in the comparing class. I keep getting the error "cannot invoke getRadius() from Circle". I'm not quite sure where I'm going wrong here and spent a few hours on it. The only thing I've managed to overload so far is my brain :P:

Many thanks for any suggestions/ help,
Matt

Code:

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public class Circle extends GeometricObject {

    private double radius;

    public Circle() {
        this(1.0);
    }

    public Circle(double radius) {
        this(radius, "white", false);
    }

    public Circle(double radius, String colour, boolean filled) {
        super(colour, filled);
        this.radius = radius;
    }

 

    public void setRadius(double radius) {
        this.radius = radius;
    }
    public double getRadius(double radius) {
        return this.radius;
    }

    public double findArea() {
        return radius * radius * Math.PI;
    }

    public double findPerimeter() {
        return 2 * radius * Math.PI;
    }

    public String toString() {
        return "Circle radius " + radius;
    }


}

---

Code:

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public class ComparableCircle extends Circle implements Comparable
{
 
  public ComparableCircle(double radius)
  {
    super(radius);
   
  }

  public int compareTo(Object o)
  {
    if (super.getRadius() > ((Circle)o).getRadius())
    {
      return 1;
    }
    else if (super.getRadius() < ((Circle)o).getRadius())
    {
      return -1;
    }
    else
    {
      return 0;
    }
  }
 
 
    public static void main(String[] args)
    {
      ComparableCircle circle1 = new ComparableCircle(6.0);
      ComparableCircle circle2 = new ComparableCircle(5.0);

      if (circle1.compareTo(circle2) > 0)
      {
        System.out.println("The larger radius is " + circle1.getRadius(radius));
      }
      else
      {
        System.out.println("The larger radius is " + circle2.getRadius());
      }
    }

 
 
 
}

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For some reason (which is beyond me), your getRadius( ... ) method takes a parameter of type double ... but so be it and you have to call that method with a double typed parameter.

kind regards,

Jos

Thank you, Serves me right for copying and pasting.... :(blush):

Quote:

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Originally Posted by monkeyhead

Thank you, Serves me right for copying and pasting.... :(blush):

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The trouble with copying and pasting code is that you really have to scrutinize the code and completely understand every gory detail of it before you can run it; otherwise it makes you a religious person (just hope for the best and believe the code is correct). Science doesn't work like that ...

kind regards,

Jos