getMethod question

Posted 09 March 2013 - 02:58 AM

Here is a simple class I wrote for an upcoming programming assignment. The assignment description states that we are required to include mutator & accessor methods as well as the calcCost() and display() methods.

Now, everything in my code works correctly. Everything displays as it should and the cost is calculated correctly. I am just curious as to the point of the accessor methods in this particular class. Perhaps I am missing something and my code is just wrong but it seems that the display() method takes care of 'accessing' the variables.

Pizza Class

public class Pizza {
   private String size; // small, medium, large
   private int cheese;  // number of cheese toppings
   private int pepp;    // number of pepperoni toppings
   private int ham; // number of ham toppings
   private double cost;

// constructor
   public Pizza() {
       size = "";
       cheese = 0;
       pepp = 0;
       ham = 0;
    }

// set methods

   public void setSize(String s) {
       size = s;
    }
   public void setToppings(int c, int p, int h) {
       cheese = c;
       pepp = p;
       ham = h;
    }

// get methods

   public String getSize() {
       return size;
    }
   public int getCheese() {
       return cheese;
    }
   public int getPepp() {
       return pepp;
    }
   public int getHam() {
       return ham;
    }

// cost method

   public double calcCost() {
    
    if(size == "small") {
        cost = 10 + (2 * cheese) + (2 * pepp) + (2 * ham);
       }
    else if(size == "medium") {
        cost = 12 + (2 * cheese) + (2 * pepp) + (2 * ham);
       }
    else if(size == "large") {
        cost = 14 + (2 * cheese) + (2 * pepp) + (2 * ham);
       }
    return cost;
    }

// print method

   public void display() {
       System.out.printf("Pizza Size: %s ", size);
       System.out.printf("Toppings: %d cheese, %d pepperoni, %d ham ", cheese, pepp, ham);
       System.out.printf("Total Cost: $%.2f", cost);
       System.out.println();
    }
}

and the PizzaDriver class to test it

public class PizzaDriver {

    /**
     * Tests the methods of the Pizza class
     */
    public static void main(String[] args) {
        
        Pizza pizza1 = new Pizza();
        Pizza pizza2 = new Pizza();       
        Pizza pizza3 = new Pizza();
        
        pizza1.setSize("small");
        pizza1.setToppings(1, 0, 1);
        
        pizza2.setSize("medium");
        pizza2.setToppings(1, 1, 1);
     
        pizza3.setSize("large");
        pizza3.setToppings(1, 1, 2);
        
        pizza1.calcCost();
        pizza1.display();
        System.out.println();
      
        pizza2.calcCost();
        pizza2.display();
        System.out.println();
        
        pizza3.calcCost();
        pizza3.display();
        System.out.println();
    }
}