Error: Cannot find symbol: Help!

Hi there!

I have almost finished my project, but I keep getting the error cannot find symbol error. I don't know why. I made sure everything was spelled correctly. Here is my code maybe you can help! I am getting the error at line 31 in the InventoryAdvanced class.

Code:

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/*
Author: Ben Hartnett
Sources: Java: A Beginner's Guide
Source 2: Monster example posted on student forums
Date Retrieved: 1-26-2012
*/

public class InventoryAdvanced {

public static void main(String args[]){

                //Define the calculation variables
                double c1;
                double c2;
                double c3;

                //Declare the calculation variables
                c1 = 13.00;
                c2 = 5.00;
                c3 = 10.00;

                //Declare the 5% restocking fee
                double fee = .05;

                //Create the objects
                InventoryDefine swordstone = new InventoryDefine("Sword In The Stone Movie", 1, 10, 13.00, 130.00);
                InventoryDefine hercules = new InventoryDefine("Hercules Movie", 2, 20, 5.00, 100.00);
                InventoryDefine mermaid = new InventoryDefine("The Little Mermaid Movie", 3, 30, 10.00, 300.00);
        InventorySort sortThis = new InventorySort();
                InventoryCal cal = new InventoryCal();
                SwordStone movie = new SwordStone();

                //Use an object to store the array
                  InventoryDefine[] inventoryArray = new InventoryDefine[3];

                //Declare the arrays
                  inventoryArray[0] = swordstone;
                  inventoryArray[1] = hercules;
                  inventoryArray[2] = mermaid;

                //Call the method from the sortThis object
                sortThis.Sort(inventoryArray);

                //Call the method from InventoryCal
                cal.calVar(c1, c2, c3);

                //Override the method from InventoryInherit
                movie.calVar(c1, fee);

        }
}

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Code:

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/**
/*
Author: Ben Hartnett
Sources: Java: A Beginner's Guide
Source 2: Monster example posted on student forums
Date Retrieved: 1-26-2012
*/

public class InventoryCal {

        //Create a method that multiplies the variables
        public void calVar(double m1, double m2, double m3){

                //Create the calculation variable
                double calEquals;

                //Create the equation
                calEquals = m1 + m2 + m3;

                //Display the result
                System.out.println("Total inventory value:" + calEquals);

        }

        public class SwordStone extends InventoryCal {

                //Create the calculation method
                public void calVar(double m1, double restockFee){

                //Create the calculation variable
                double calEquals;

                //Create the equation
                calEquals = m1 + 10 * restockFee;

                //Display the result
                System.out.println("Sword In The Stone product value with restocking fee:" + calEquals);

                }

        }
}

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Code:

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/*
Author: Ben Hartnett
Sources: Java: A Beginner's Guide
Source 2: Monster example posted on student forums
Date Retrieved: 1-26-2012
*/

//Create the class while it implements the Comparable
public class InventoryDefine implements Comparable<InventoryDefine> {

        //Define the variables
        private String inventoryName;
        private int inventoryNumber;
        private int inventoryStock;
        private double inventoryPrice;
        private double inventoryValue;

        //Declare the constructor
        public InventoryDefine(String inventoryName, int inventoryNumber, int inventoryStock, double inventoryPrice, double inventoryValue){

                this.inventoryName = inventoryName;
                this.inventoryNumber = inventoryNumber;
                this.inventoryStock = inventoryStock;
                this.inventoryPrice = inventoryPrice;
                this.inventoryValue = inventoryValue;

        }

        //Use the toString method
        public String toString() {

                return inventoryName + ", " + inventoryNumber + ", " + inventoryStock + ", " + inventoryPrice + ", " + inventoryValue; //Return values

  }

        //Use the compareTo method
        public int compareTo(InventoryDefine id){

                return this.inventoryNumber - id.inventoryNumber; //Return values

        }
}

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Code:

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/*
Author: Ben Hartnett
Sources: Java: A Beginner's Guide
Source 2: Monster example posted on student forums
Date Retrieved: 1-26-2012
*/

import java.util.Arrays;

public class InventorySort {

        public void Sort(InventoryDefine[] array){

            Arrays.sort(array);

            for (int i = 0; i < 3; i++){

            System.out.println(array[i]);

            }

          }
}

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Your SwordStone class is defined inside of InventoryCal for no good reason that I can see and because of this, the compiler can't find it. Get it into its own Java class.

Quote:

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Originally Posted by Fubarable

Your SwordStone class is defined inside of InventoryCal for no good reason that I can see and because of this, the compiler can't find it. Get it into its own Java class.

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This is for a school assignment. I am supposed to create a subclass of the InventoryCal class. I am supposed to show my knowledge of inheritance. Did I not do it correctly?

Quote:

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Originally Posted by BenH

This is for a school assignment. I am supposed to create a subclass of the InventoryCal class. I am supposed to show my knowledge of inheritance. Did I not do it correctly?

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No you didn't. Again, it's not supposed to be an inner class. Give it its own file (again!).