Need help with Car Inventory Program part 3

[Kevin Quarles]

Here is what I am supposed to have:

Modify the Inventory Program by creating a subclass of the product class that uses one additional unique feature of the product. This subclass must be "SUV" In the subclass, create a method to calculate the value of the inventory of a product with the same name as the method previously created for the product class. The subclass method should also add a 5% restocking fee to the value of the inventory of that product.
Modify the output to display this additional feature you have chosen and the restocking fee. The subclass of your product will be SUVs. This means that your subclass must be called “SUV”, and it will extend your “Car” class. The additional feature will be “mpg” which stands for the Miles Per Gallon. This data member should be of type “double” or “float”. The rest of the program will function the way it is described in the syllabus.

I get the following errors:

Inventory3.java:5: cannot find symbol
symbol : class Inventory
location: class Inventory3
private static Inventory i;
^
Inventory3.java:10: cannot find symbol
symbol : variable Suvcar
location: class Inventory3
Suvcar = new SuvCar(1, "Escape", 3, 34714.99);
^
Inventory3.java:10: cannot find symbol
symbol : class SuvCar
location: class Inventory3
Suvcar = new SuvCar(1, "Escape", 3, 34714.99);
^
Inventory3.java:11: cannot find symbol
symbol : variable Suvcar
location: class Inventory3
Suvcar = new SuvCar(2, "Taurus", 5, 24999.99);
^
Inventory3.java:11: cannot find symbol
symbol : class SuvCar
location: class Inventory3
Suvcar = new SuvCar(2, "Taurus", 5, 24999.99);
^
Inventory3.java:12: cannot find symbol
symbol : variable Suvcar
location: class Inventory3
Suvcar = new SuvCar(3, "Vue", 4, 32799.99);
^
Inventory3.java:12: cannot find symbol
symbol : class SuvCar
location: class Inventory3
Suvcar = new SuvCar(3, "Vue", 4, 32799.99);
^
Inventory3.java:15: cannot find symbol
symbol : class Inventory
location: class Inventory3
i = new Inventory(3);
^
Inventory3.java:16: cannot find symbol
symbol : variable p1
location: class Inventory3
i.add(p1, 0);
^
Inventory3.java:17: cannot find symbol
symbol : variable p2
location: class Inventory3
i.add(p2, 1);
^
Inventory3.java:18: cannot find symbol
symbol : variable p3
location: class Inventory3
i.add(p3, 2);
^
11 errors


Here is what I have come up with:

Inventory3:

  // Inventory3

public class Inventory3 
{
	private static Inventory i;

	public static void main(String[] args) {

		// create 3 products
		Suvcar  = new SuvCar(1, "Escape", 3, 34714.99);
		Suvcar  = new SuvCar(2, "Taurus", 5, 24999.99);
		Suvcar  = new SuvCar(3, "Vue", 4, 32799.99);
		
		// make inventory
		i = new Inventory(3);
		i.add(p1, 0);
		i.add(p2, 1);
		i.add(p3, 2);
		
		// sort
		i.sort();

		// output
		for (int k = 0; k < 3; k++) {
			System.out.println(i.get(k));
		}
		
		System.out.println();
		
		// total val
		System.out.printf("Total value = $%.2f", i.totalValue());
	}

}  

Car class:

  // Car Class

public class Car
{
	int CarNumber;
	String CarName;
	int quantity;
	double price;

	
	public Car(int number, String name, int quantity, double MSRP)
	{
		CarNumber = number;
		CarName = name;
		this.quantity = quantity;
		price = MSRP; 
	}
//	getCarNumber: returns the identifier for the item
	public int getCarNumber()
	{
		return CarNumber;
	}
//	setCarNumber: sets the identifier for the item
	public void setCarNumber(int value)
	{
		CarNumber = value; 
	}
//	getCarName: returns the item name for the item
	public String getCarName()
	{
		return CarName;
	}

//	getQuantity: returns the quantity of Cars in stock
	public int getQuantity()
	{
		return quantity;
	}
//	setQuantity: sets the number of Cars in stock
	public void setQuantity(int value)
	{
		quantity = value;
	}
//	getPrice: returns the price for the car
	public double getPrice()
	{
		return price;
	}
//	setPrice: sets the price for the car
	public void setPrice(double value)
	{
		price = value;
	}
//	getInventoryValue: calculates the total value of the inventory for the item
	public double getInventoryValue()
	{
		return getPrice() * getQuantity();
	}
//	toString returns the printout of the individual item for display to the screen
	public String toString()
	{
		return String.format("\nINVENTORY INFO\n%s %s\n%s\t %s\n%s\t %d\n%s\t $%,.2f\n%s\t $%,.2f","Product Number: ", getCarNumber(),
				"Product Name: ", getCarName(), "Units In Stock:", getQuantity(),
				"Price per Unit:", getPrice(), "Total Inventory Value:", getInventoryValue());
	}
}
  

Suv class:

  // Suv class

class Suv extends InventoryProgram3

{
	
	private String MPG = "";
	
	public ExtendedCar(int item, String name, int units, double price, String studio) {
		super(item, name, units, price);
		this.MPG = MPG;
	}

	public String getMPG() {
		return MPG;
	}

	public void setMPG(String time) {
		this.MPG = MPG;
	}
	
//	total value
	public double getInventoryValue() {
		return 1.05*getQuantity()*getPrice();
	}
	
//	fee
	public double fee() {
		return 0.05*getQuantity()*getPrice();
	}
	
//	toString returns the printout of the individual item for display to the screen
	public String toString()
	{
		return String.format("\nINVENTORY INFO\n%s %s\n%s\t %s\n%s\t %d\n%s\t $%,.2f\n%s\t%s\n%s\t $%,.2f \n%s\t$%,.2f","Product Number: ", getCarNumber(),
				"Product Name: ", getCarName(), "Units In Stock:", getQuantity(),
				"Price per Unit:", getPrice(), 
				"Running time:", getTime(),
				"Fee:", fee(), "Total Inventory Value:", getInventoryValue());
	}
	
}  

MPG class:

  public class MPG {

	private Suv[] list;

	// constructor
	public Inventory(int size) {
		list = new Suv[size];
	}

	// complete value
	public double totalValue() {
		double val = 0.0;
		for (int i = 0; i < list.length; i++) {
			val += list[i].getInventoryValue();
		}
		return val;
	}

	// add an item
	public void add(Suv d, int p) {
		list[p] = d;
	}

	// get an item
	public Car get(int i) {
		return list[i];
	}

	// sort by name
	public void sort() {
		// bubble sort
		int n = list.length;
		for (int search = 1; search < n; search++) {
			for (int i = 0; i < n-search; i++) {
				if (list[i].getCarName().compareToIgnoreCase(list[i+1].getCarName()) > 0) {
					// swap
					Suv temp = list[i];
					list[i] = list[i+1];
					list[i+1] = temp;
				}
			}
		}
	}
}

  

[Henry Wong]

You seem to be missing a few classes...

Inventory3.java:5: cannot find symbol
symbol : class Inventory
location: class Inventory3
private static Inventory i;
^
Inventory3.java:10: cannot find symbol
symbol : class SuvCar
location: class Inventory3
Suvcar = new SuvCar(1, "Escape", 3, 34714.99);
^

Where is the Inventory class, and the SuvCar class?

Henry

[Kevin Quarles]

Should both of them be named Car and Suv respectively?

[Kevin Quarles]

Henry Wong wrote:You seem to be missing a few classes...

Inventory3.java:5: cannot find symbol
symbol : class Inventory
location: class Inventory3
private static Inventory i;
^
Inventory3.java:10: cannot find symbol
symbol : class SuvCar
location: class Inventory3
Suvcar = new SuvCar(1, "Escape", 3, 34714.99);
^

Where is the Inventory class, and the SuvCar class?

Henry

The 4 files I have are Inventory3, Car, Suv, and MPG. Is there any way to simplify this? I tried to play around with the classes in the Inventory3 part of it, but I am just getting more confused

[Campbell Ritchie]

That sounds as simple as you can get: Car in Car.java, Suv in Suv.java, etc. One class, one file. Remember a "public top-level class" usually must have the same name as its file, so you can't fit two public top-level classes into one file.

And something else: don't use \n in String#format, Formatter#format, PrintStream#format and PrintStream#printf. Use %n instead. From the Formatter API documentation:

'n' line separator The result is the platform-specific line separator

This might be \n (*nix) \r (older Macs) or \r\n (DOS/Windows).

[Kevin Quarles]

Ok, I have made a few changes, but I am still getting the errors from before.

Inventory3.java:10: cannot find symbol
symbol : variable Car
location: class Inventory3
Car = new Car(1, "Escape", 3, 34714.99);
^
Inventory3.java:11: cannot find symbol
symbol : variable Car
location: class Inventory3
Car = new Car(2, "Taurus", 5, 24999.99);
^
Inventory3.java:12: cannot find symbol
symbol : variable Car
location: class Inventory3
Car = new Car(3, "Vue", 4, 32799.99);
^
Inventory3.java:15: cannot find symbol
symbol : class Inventory
location: class Inventory3
i = new Inventory(3);
^
Inventory3.java:16: cannot find symbol
symbol : variable p1
location: class Inventory3
i.add(p1, 0);
^
Inventory3.java:17: cannot find symbol
symbol : variable p2
location: class Inventory3
i.add(p2, 1);
^
Inventory3.java:18: cannot find symbol
symbol : variable p3
location: class Inventory3
i.add(p3, 2);
^
Inventory3.java:21: cannot find symbol
symbol : method sort()
location: class Inventory3
i.sort();
^
Inventory3.java:25: cannot find symbol
symbol : method get(int)
location: class Inventory3
System.out.println(i.get(k));
^
Inventory3.java:31: cannot find symbol
symbol : method totalValue()
location: class Inventory3
System.out.printf("Total value = $%.2f", i.totalValue());
^

What am I doing wrong? I have been on this again since 6am this morning

[Henry Wong]

The compiler messages are pretty clear. What is it that you don't understand?

Inventory3.java:10: cannot find symbol
symbol : variable Car
location: class Inventory3
Car = new Car(1, "Escape", 3, 34714.99);
^

Line 10 of Inventory3.java, you are using a variable name "Car", but the compiler can't find it -- either you forgot to declare it, or it is not in scope.

Inventory3.java:11: cannot find symbol
symbol : variable Car
location: class Inventory3
Car = new Car(2, "Taurus", 5, 24999.99);
^

Line 11 of Inventory3.java, you are using a variable name "Car", but the compiler can't find it -- either you forgot to declare it, or it is not in scope.


And BTW, it is generally a good idea to only fix one or two problems, then recompile -- as some compile problems can be caused by or hidden by, other compile problems... which is why I only explained the first two.

Henry

[Kevin Quarles]

Ok, I spent the day rewriting the whole thing and I think I made things worse.

Here are the errors when trying to compile the program:

InventoryProgramPart3.java:33: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
public static double calculateInventory(Car2[] cars) {
^
InventoryProgramPart3.java:8: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 cars[] = new Car2[5];
^
InventoryProgramPart3.java:8: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 cars[] = new Car2[5];
^
InventoryProgramPart3.java:12: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 Escape = new Car2(1, "Escape", 24, 44675.75);
^
InventoryProgramPart3.java:12: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 Escape = new Car2(1, "Escape", 24, 44675.75);
^
InventoryProgramPart3.java:14: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 Vue = new Car2(2, "Vue", 20, 29457.99);
^
InventoryProgramPart3.java:14: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 Vue = new Car2(2, "Vue", 20, 29457.99);
^
InventoryProgramPart3.java:16: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 F150 = new Car2(3, "F-150", 12, 45233.25);
^
InventoryProgramPart3.java:16: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 F150 = new Car2(3, "F-150", 12, 45233.25);
^
InventoryProgramPart3.java:18: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 Aerostar = new Car2(4, "Aerostar", 6, 5000.00);
^
InventoryProgramPart3.java:18: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 Aerostar = new Car2(4, "Aerostar", 6, 5000.00);
^
InventoryProgramPart3.java:20: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 Caravan = new Car2(5, "Caravan", 15, 24766.50);
^
InventoryProgramPart3.java:20: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 Caravan = new Car2(5, "Caravan", 15, 24766.50);
^
InventoryProgramPart3.java:38: inconvertible types
found : <nulltype>
required: double
sum += cars[i].getUnitPrice();
^
14 errors

And now for the codes:

First one is InventoryProgramPart3:

  public class InventoryProgramPart3 {

// begin main method
    public static void main(String args[]) {

// create array for Car2

        Car2 cars[] = new Car2[5];



        Car2 Escape = new Car2(1, "Escape", 24, 44675.75);

        Car2 Vue = new Car2(2, "Vue", 20, 29457.99);

        Car2 F150 = new Car2(3, "F-150", 12, 45233.25);

        Car2 Aerostar = new Car2(4, "Aerostar", 6, 5000.00);

        Car2 Caravan = new Car2(5, "Caravan", 15, 24766.50);



        for (int i = 0; i < cars.length; i++) {

            System.out.println("Car Number: /t" + cars[i].getItemName());

        }

    } // end method main

    // call calculateInventory method
    public static double calculateInventory(Car2[] cars) {

        double sum = 0;
        for (int i = 0; i < cars.length; i++) {

            sum += cars[i].getUnitPrice();

        }

        return sum;

    }
} // end class InventoryProgramPart3  

The second one is Car2

  
class Car2

{

public int itemNumber;

public String itemName;

public int units;

public double unitPrice;

 

 

public void setItemNumber( int itemNumber )

{

this.itemNumber = itemNumber;

}

 

public int getItemNumber()

{

return itemNumber;

}

 

public void setItemName( String itemName )

{

this.itemName = itemName;

}

 

public String getItemName()

{

return itemName;

}

 

public void setUnits( int units )

{

this.units = units;

}

 

public int getUnits()

{

return units;

}

 

 

public void setUnitPrice( double unitPrice )

{

this.unitPrice = unitPrice;

}

 

public double getUnitPrice()

{

return unitPrice;

}

 

// calculate supplies inventory value

public double calculateValue()

{

return units * unitPrice;

} // end method inventory value

 

// initialize constructor

public Car2( int itemNumber, String itemName, int units, double unitPrice )

{

itemNumber = itemNumber;

itemName = itemName;

units = units;

unitPrice = unitPrice;

} // end constructor

 

 

// display inventory

public void displayInventory()

{

System.out.println(); // outputs blank line

 

System.out.println( "Car Number: "+itemNumber );

System.out.println( "Car Name: "+itemName );

System.out.println( "Quantity Available: "+ units );

System.out.printf( "Unit Price: $%.2f", unitPrice );

 

SUV Car = new SUV2

 

System.out.println( "\nSUV2: "+ Car.getSUV2() );

 

// value() method and display the value

System.out.printf( itemName + "\nInventory value" + "is = $%.2f\n",

calculateValue() );

 

} // end display inventory

 

} // end class Car2  

The last one is SUV2. On this one, I have to use SUV and the extender, and I have to show MPG's (miles per gallon) I think I may have screwed up here, but I have so many things going on here, I am not quite sure what to do.

  
class SUV2 extends Car2

{



private String suppliesMPG;

 

// initialize constructor

MPG( int itemNumber, String itemName, int units,

double unitPrice, String MPG )

{

super( itemNumber, itemName, units, unitPrice );

Car SUV2 = SUV2;

} // end constructor

 

// set Car MPG

public void setMPG( String MPG )

{

this.CarMPG = MPG;

} // end method

 

// return Car MPG

public String getMPG()

{

return productMPG;

} // end method

 

// add 5% restocking fee

public double calculateValue()

{

return super.calculateValue() * 1.05;

} // end method

 

// calculate restock fee

public double calculateRestockFee()

{

return super.calculateValue() * .05;

} //end method

 

// String format

public String toString()

{

String formatString = "MPG: %s";

formatString += "Restock Fee: $%.2f";

formatString = String.format( formatString, CarMPG,

super.calculateValue() * 0.05 );

return( formatString + super.toString() );

}

 

// display inventory

public void displayInventory()

{

super.displayInventory();

System.out.println( toString() );

 

// Display total value plus reStock fee

System.out.printf(itemName+ "\nInventory value" +" is: $%.2f\n",

calculateRestockingFee() );

 

} // end method display inventory

 

} // end class Suv  

[Larry Robinson]

It seems to me that you are forgetting the main principle behind java, Make each part work. You can take the main then one part and make it work when you are done with it start the next part and make it work, of course with the first part.
Hopefully I am not insulting here. Just trying to help. I to will copy it and see if I can be more help
I would say "Good luck" but there is no such thing just hard work and good beliefs.

[Kevin Quarles]

Not insulted. But Frustrated...yes. Most of the mistakes I have made in the past ave been absolutely dumb. This one though takes the cake, if only I could figure out what I am doing wrong. Adding another class with the MPG requirement is throwing me off big time.

Thank you in advance. I can take any help I can get at this point.

[Campbell Ritchie]

Welcome to the Ranch ( ) Larry Robinson.

The advice to do things in tiny stages is very useful.

[Kevin Quarles]

Ok, after some sleep last night, I made a few changes. Some of which were stupid mistakes on my part, and some of which I would have never found on my own. The first problem was the "MPG" in my SUV2 class. Another is that I found out that I was not using an array at all in the InventoryProgramPart3 class. Now I am getting 14 errors. I am wondering if I even did that array right. Am I on the right track to assume that all my problems are within the Car array?

Here is the code for InventoryProgramPart3:

  public class InventoryProgramPart3 {

// begin main method
    public static void main(String args[]) {

// create array for Car2

        cars cars[] = new Car2[5];



        Cars[0] = new Car2 (1, "Escape", 24, 44675.75);

        Cars[1] = new Car2 (2, "Vue", 20, 29457.99);

        Cars[2] = new Car2 (3, "F-150", 12, 45233.25);

        Cars[3] = new Car2 (4, "Aerostar", 6, 5000.00);

        Cars[4] = new Car2 (5, "Caravan", 15, 24766.50);



        for (int i = 0; i < cars.length; i++) {

            System.out.println("Car Number: /t" + cars[i].getItemName());

        }

    } // end method main

    // call calculateInventory method
    public static double calculateInventory(Car2[] cars) {

        double sum = 0;
        for (int i = 0; i < cars.length; i++) {

            sum += cars[i].getUnitPrice();

        }

        return sum;

    }
} // end class InventoryProgramPart3  

[Campbell Ritchie]

So what were the errors? Try to correct the first one you can see at the top of the list, then repeat the compilation. You may find correcting one error will clear several more, so you reduce the error count quickly.

The bit you are doing wrong about the array is declaring its type incorrectly. Have you been through the Java Tutorials about for loops and arrays? That would allow you to check, and also show you the enhanced for loop, which may be easier to use here.

[Kevin Quarles]

  public class InventoryProgramPart3 {

// begin main method
    public static void main(String[] args) {

// create array for Car2

        Car2 cars[] = new Car2[5];



        cars[0] = new Car2(1, "Escape", 24, 44675.75);

        cars[1] = new Car2(2, "Vue", 20, 29457.99);

        cars[2] = new Car2(3, "F-150", 12, 45233.25);

        cars[3] = new Car2(4, "Aerostar", 6, 5000.00);

        cars[4] = new Car2(5, "Caravan", 15, 24766.50);



        for (int i = 0; i < cars.length; i++) {

            System.out.println("Car Number: /t" + cars[i].getItemName());

        }

    } // end method main

    // call calculateInventory method
    public static double calculateInventory(Car2[] cars) {

        double sum = 0;
        for (int i = 0; i < cars.length; i++) {

            sum += cars[i].getUnitPrice();

        }

        return sum;

    }
} // end class InventoryProgramPart3  

Now I am only down to 9 errors. It seems like I am going around is circles. The last couple of errors are something that I have no idea what is wrong.

[Campbell Ritchie]

Ignore the last error. Sort out the first error, and maybe the last error will go away. Look at this list of error messages. You probably want those in the "compiler" link. I found a second link which looks promising.

[Kevin Quarles]

Here is what I got. I have been over and over this....reading the textbook over and over again, and still nothing! I am about ready to throw my computer out the darn window! I can't believe I have wasted the whole weekend trying to figure this out!

InventoryProgramPart3.java:46: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
public static double calculateInventory(Car2[] cars) {
^
InventoryProgramPart3.java:21: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 cars[] = new Car2[5];
^
InventoryProgramPart3.java:21: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
Car2 cars[] = new Car2[5];
^
InventoryProgramPart3.java:25: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
cars[0] = new Car2(1, "Escape", 24, 44675.75);
^
InventoryProgramPart3.java:27: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
cars[1] = new Car2(2, "Vue", 20, 29457.99);
^
InventoryProgramPart3.java:29: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
cars[2] = new Car2(3, "F-150", 12, 45233.25);
^
InventoryProgramPart3.java:31: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
cars[3] = new Car2(4, "Aerostar", 6, 5000.00);
^
InventoryProgramPart3.java:33: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
cars[4] = new Car2(5, "Caravan", 15, 24766.50);
^
InventoryProgramPart3.java:51: inconvertible types
found : <nulltype>
required: double
sum += cars[i].getUnitPrice();
^
9 errors

InventoryProgramPart3 class:

  
import java.util.Scanner;
import java.util.Arrays;

public class InventoryProgramPart3
{

// main method begins program execution
public static void main(String args[] )
{
// create Scanner to obtain input from command window
Scanner input = new Scanner( System.in );

}
// begin main method

{
        
// create array for Car2

        Car2 cars[] = new Car2[5];



        cars[0] = new Car2(1, "Escape", 24, 44675.75);

        cars[1] = new Car2(2, "Vue", 20, 29457.99);

        cars[2] = new Car2(3, "F-150", 12, 45233.25);

        cars[3] = new Car2(4, "Aerostar", 6, 5000.00);

        cars[4] = new Car2(5, "Caravan", 15, 24766.50);



        for (int i = 0; i < cars.length; i++) {

            System.out.println("Car Number: /t" + cars[i].getItemName());

    }

    } // end method main

    // call calculateInventory method
    public static double calculateInventory(Car2[] cars) {

        double sum = 0;
        for (int i = 0; i < cars.length; i++) {

            sum += cars[i].getUnitPrice();

        }

        return sum;

    }
} // end class Inventory3  

Car2 class:

  
public class Car2

{

public Car2(int itemNumber, String itemName, int units, double unitPrice) {
        this.itemNumber = itemNumber;
        this.itemName = itemName;
        this.units = units;
        this.unitPrice = unitPrice;

    } // end constructor

    // display inventory
    public void displayInventory() {

        System.out.println(); // outputs blank line
        System.out.println("Car Number: " + itemNumber);
        System.out.println("Car Name: " + itemName);
        System.out.println("Quantity Available: " + units);
        System.out.printf("Unit Price: $%.2f", unitPrice);
        System.out.printf(itemName + "\nInventory value" + "is = $%.2f\n",
                calculateValue());
    } // end display inventory
}
  

SUV2 code:

  
public class Car2

{

public Car2(int itemNumber, String itemName, int units, double unitPrice) {
        this.itemNumber = itemNumber;
        this.itemName = itemName;
        this.units = units;
        this.unitPrice = unitPrice;

    } // end constructor

    // display inventory
    public void displayInventory() {

        System.out.println(); // outputs blank line
        System.out.println("Car Number: " + itemNumber);
        System.out.println("Car Name: " + itemName);
        System.out.println("Quantity Available: " + units);
        System.out.printf("Unit Price: $%.2f", unitPrice);
        System.out.printf(itemName + "\nInventory value" + "is = $%.2f\n",
                calculateValue());
    } // end display inventory
}
  

[Henry Wong]

InventoryProgramPart3.java:46: cannot find symbol
symbol : class Car2
location: class InventoryProgramPart3
public static double calculateInventory(Car2[] cars) {
^

This error is saying that the compiler can't find the Car2 class. This is most likely due to the fact that Car2 failed to compile. Try to compile and fix all the problems with the Car2 class first.

Henry

[Kevin Quarles]

Now this is more like it!!! I finally figured out what I needed. Now, When I compile, the program compiles, however the SUV class does not compile with it, and when I go to run the program, it kicks me right back out to the c: prompt.

InventoryProgramPart3 class:

  import java.util.Scanner;
import java.util.Arrays;

public class InventoryProgramPart3
{
private static InventoryProgramPart3 i;
// main method begins program execution
public static void main(String args[] )
{
// create Scanner to obtain input from command window
Scanner input = new Scanner( System.in );

}
// begin main method

{

// create array for Car2

        Car2 cars[] = new Car2[5];



        cars[0] = new Car2(1, "Escape", 24, 44675.75);

        cars[1] = new Car2(2, "Vue", 20, 29457.99);

        cars[2] = new Car2(3, "F-150", 12, 45233.25);

        cars[3] = new Car2(4, "Aerostar", 6, 5000.00);

        cars[4] = new Car2(5, "Caravan", 15, 24766.50);



        for (int i = 0; i < cars.length; i++) {

            System.out.println("Car Number: /t" + cars[i].getitemName());

    }

    } // end method main

    // call calculateInventory method
    public static double calculateInventory(Car2[] cars) {

        double sum = 0;
        for (int i = 0; i < cars.length; i++) {

            sum += cars[i].getunitPrice();

        }

        return sum;

    }
} // end class InventoryProgramPart3  

Car2 class:

  // The Car Class

public class Car2 {
    int itemNumber;
	String itemName;
	int units;
	double unitPrice;
 public Car2(int itemNumber, String itemName, int units, double unitPrice) {
        this.itemNumber = itemNumber;
        this.itemName = itemName;
        this.units = units;
        this.unitPrice = unitPrice;

    } // end constructor

 //	getdvdNumber: returns the identifier for the item
	public int getitemNumber()
	{
		return itemNumber;
	}
//	setdvdNumber: sets the identifier for the item
	public void setitemNumber(int value)
	{
		itemNumber = value; 
	}
//	getdvdName: returns the item name for the item
	public String getitemName()
	{
		return itemName;
	}

//	getQuantity: returns the quantity of dvds in stock
	public int getunits()
	{
		return units;
	}
//	setQuantity: sets the number of dvds in stock
	public void setunits(int value)
	{
		units = value;
	}
//	getPrice: returns the price for the dvd
	public double getunitPrice()
	{
		return unitPrice;
	}
//	setPrice: sets the price for the dvd
	public void setPrice(double value)
	{
		unitPrice = value;
	}
//	getInventoryValue: calculates the total value of the inventory for the item
	public double getInventoryValue()
	{
		return getunitPrice() * getunits();
	}
//	toString returns the printout of the individual item for display to the screen
	public String toString()
	{
		return String.format("\nINVENTORY INFO\n%s %s\n%s\t %s\n%s\t %d\n%s\t $%,.2f\n%s\t $%,.2f","Product Number: ", getitemNumber(),
				"Product Name: ", getitemName(), "Units In Stock:", getunits(),
				"Price per Unit:", getunitPrice(), "Total Inventory Value:", getInventoryValue());
	}
}  

And SUV2 class

  public class SUV2 extends Car2 
{

    private String mpg;

// initialize constructor
    SUV2(int itemNumber, String itemName, int units,
            double unitPrice, String MPG) {

        super(itemNumber, itemName, units, unitPrice);

        mpg = MPG;

    } // end constructor

// set Car MPG
    public void setMPG(String MPG) {
        this.mpg = MPG;
    } // end method

// return Car MPG
    public String getMPG() {
        return mpg;
    } // end method


    public double calculateRestockFee() {
        return super.calculateValue() * .05;
    }

    public String toString() {

        String formatString = "MPG: %s";
        formatString += "Restock Fee: $%.2f";
        formatString = String.format(formatString, mpg,
                calculateRestockFee());

        return (formatString + super.toString());
    }

    public void displayInventory() {

        super.displayInventory();
        System.out.println(toString());

        // Display total value plus reStock fee
        System.out.printf(itemName + "\nInventory value" + " is: $%.2f\n",
                calculateRestockFee());
    } // end method display inventory
} // end class SUV2
  

Let me repeat for you, there are no errors showing up when I compile or run the program, I am just getting kicked out of it for some reason

[Henry Wong]

Kevin Quarles wrote:
Let me repeat for you, there are no errors showing up when I compile or run the program, I am just getting kicked out of it for some reason

Let's see what your main() method does, shall we?

// main method begins program execution
public static void main(String args[] )
{
    // create Scanner to obtain input from command window
    Scanner input = new Scanner( System.in );
}
// begin main method

The main method creates a Scanner object named input, and... that is all it does. You have some code after the main method, which you think is part of the main method, but it isn't.

Henry

[Kevin Quarles]

Thank you for your patience. Do I get rid of it? If I do that, I have to get rid of import java.util.Scanner as well, right?

[Kevin Quarles]

Ok, Got rid of both. It still compiles, but as soon as I run it, all I get is the c: prompt. SUV2 does not compile at all.

[Campbell Ritchie]

That last post doesn't make sense. Either it all compiles, or nothing compiles. Do you mean it throws an Exception when you run it? Or does it run and apparently nothing happens?