Estoy intentando que una clase devuelva una cadena de otra clase, aunque el retorno que obtengo es nulo. Tengo un método set que funciona al configurar la cadena en la clase original, pero cuando llamo al método en mi segunda clase, obtengo un retorno de nulo.

Aquí está la primera clase;

public class IceCream
{
    // instance variables - replace the example below with your own
    private String flavour;
    public static double price;


    /**
     * Constructor for objects of class IceCream
     */
    public IceCream()
    {
        // initialise instance variables
        String flavour = getFlavour();
        price = 0.50;

    }

    /**
     * Gets price in pence.
     * 
     * 
     * @returns the price of the ice cream.
     */
    public static double getPrice()
    {
        // put your code here
        return price;
    }

    public int getScoops()
    {
        return scoop;
    }

public void setPrice(int newPrice)
{
    price = newPrice;
}

public void setScoops(int scoopNumber)
{
    scoop = scoopNumber;
}

public double totalCost()
{
    double cost;
    cost = scoop * price;
    return cost;

}

public String getFlavour()
{
  return flavour; 
}

public void setFlavour(String whatFlavour)
{
    flavour = whatFlavour;
}

}

Y la segunda clase, en la que estoy tratando de llamar a la cadena que ingresé en el método setFlavour en el println del método sundaeDetails.

import java.util.ArrayList;
/**
 * Write a description of class Sundae here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class Sundae
{
    // instance variables - replace the example below with your own
    private IceCream flavour;
    private Topping SundaeTopping;
    private int scoops;


    /**
     * Constructor for objects of class Sundae
     */
    public Sundae()
   {
     flavour = new IceCream();
     SundaeTopping = new Topping();
     scoops = 0;
   }
   /**
    * Set scoop number.
    */

    public void setScoops(int scoopNumber)
   {
    scoops = scoopNumber;
   }
   /**
    * Return scoop variable.
    */
   public int getScoops()
   {
       return scoops;
   }
   /**
    * Get the price of the sundae.
    */ 
   public void getPrice()
   {
        double cost;
        double scoopPrice = scoops * IceCream.getPrice();
        if ( scoops > 0) {
            cost = scoopPrice * Topping.getToppingPrice();
            System.out.println("Cost of Sundae: " + cost);
         }
        else {
        System.out.println("Need to have a scoop of ice cream in your Sundae.");
    }
    }

    /**
     * Return the details of the sundae; price, flavour, scoops etc.
     */
   public void sundaeDetails()
   {
       System.out.println("You have " + scoops + " scoops of " + flavour.getFlavour() + "ice cream");
   }
}