[Justawind]

What I need to do is create a toString to show the genre of the DVDs, and also show a 5% restocking fee...Code below

import java.util.Arrays;

public class Inventory3 {

public static void main(String[] args) {
TypedDVD dvd = null;
Inventory inventory = new Inventory(); // Create a new inventory

System.out.println("\nNorman's DVD Inventory\n");

dvd = new TypedDVD(0, "Mother,Jugs and Speed", 1, 15.00f, "Comedy");
inventory.add(dvd);

dvd = new TypedDVD(1, "Clash of the Titans", 10, 12.49f, "Fiction");
inventory.add(dvd);

dvd = new TypedDVD(2, "300", 1, 1.00f, "History");
inventory.add(dvd);

dvd = new TypedDVD(3, "Full Metal Jacket", 2, 20.00f, "War");
inventory.add(dvd);

dvd = new TypedDVD(4, "Jarhead", 5, 5.00f, "War");
inventory.add(dvd);

inventory.display();

System.out.println("That's all, folks!\n");
} // end main method

} // end class Inventory3


class DVD {
private int productNumber;
private String title;
private int numCopies;
private float price;

DVD(int productNumber, String title, int numCopies, float price) {
this.productNumber = productNumber;
this.title = title;
this.numCopies = numCopies;
this.price = price;
}

public String toString() {
return String.format("ProdNum= %3d Title= %-25s numCopies= %3d price= $%6.2f value= $%7.2f",
productNumber, title, numCopies, price, value());
}

public float value() {
return numCopies * price;
}

} // end class DVD


class TypedDVD extends DVD {
private String genre;

TypedDVD(int productNumber, String title, int numCopies, float price, String genre) {
super(productNumber, title, numCopies, price);
this.genre = genre;

public String toString() {
return String.format("ProdNum= %3d Title= %-25s numCopies= %3d price= $%6.2f genre= %-25s value= $%7.2f",
productNumber, title, numCopies, price, genre, value());
}

public float restockingFee() {
return super.value() * 0.05f;
System.out.printf("\nThe restocking fee is $%.2f\n\n", value());


}

public float value() {
return super.value() + restockingFee();
}

} // end TypedDVD class


class Inventory {
private DVD[] dvds;
private int numDVDs;

Inventory() {
dvds = new DVD[10];
numDVDs = 0;
}

// Add a DVD to the collection
public void add(DVD dvd) {
dvds[numDVDs] = dvd;
++numDVDs;
}

public float value() {
float total = 0;
for (int i = 0; i < numDVDs; i++)
total += dvds[i].value();
return total;
}

public void display() {
System.out.println("There are " + numDVDs + " DVDs in the collection\n");
for (int i = 0; i < numDVDs; i++)
System.out.println(dvds[i]);
System.out.printf("\nTotal value of the collection is $%.2f\n\n", value());
}

} //end class Inventory

[Chicon]

Hi Justawind,

In the TypeDVD class, you may replace the following methods :

public String toString() {
    return String.format("ProdNum= %3d Title= %-25s numCopies= %3d price= $%6.2f genre= %-25s       value= $%7.2f", productNumber, title, numCopies, price, genre, value());
}

public float restockingFee() {
    return super.value() * 0.05f;
    System.out.printf("\nThe restocking fee is $%.2f\n\n", value());
}

public float value() {
    return super.value() + restockingFee();
}

by :

public String toString() {
    return genre;
}

public void restockingFee() {
    System.out.printf("\nThe restocking fee is $%.2f\n\n", value() * 1.05f);
}

The toString method of the TypeDVD class will override the toString method of DVD.
In the restockingFee method, value() is inherited from the DVD class, therefore, there's no need to 'super' it.

[Justawind]

Thanks, that did the trick.

[Chicon]

You're welcome !