Here is assignment 3

public abstract class Item { private double price; private long UPC; public Item(double price, long uPC) { this.price = price; this.UPC = uPC; } public double getPrice() { return price; } public void setPrice(double price) { this.price = price; } public long getUPC() { return UPC; } public void setUPC(long uPC) { UPC = uPC; } public String toString() { return " Price=" + price + ", UPC=" + UPC; } }

//Book class

public class Book extends Item { //Declaring instance variables

private String title;

private String ISBN;

// Book constructor

public Book(String title, String iSBN, double price, long UPC) {

super(price, UPC); this.title = title;

this.ISBN = iSBN;

}

//toString method is used to display the contents of an object inside it public String toString() {

return "Book :: Title=" + title + ", ISBN=" + ISBN + super.toString();

}

//Setters and getters public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getISBN() {

return ISBN;

}

public void setISBN(String iSBN) {

ISBN = iSBN;

}

public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((ISBN == null) ? 0 : ISBN.hashCode()); result = prime * result + ((title == null) ? 0 : title.hashCode()); return result; }

public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (!(obj instanceof Book)) return false; Book other = (Book) obj; if (ISBN == null) { if (other.ISBN != null) return false; } else if (!ISBN.equals(other.ISBN)) return false; if (title == null) { if (other.title != null) return false; } else if (!title.equals(other.title)) return false; return true; }

}

// Pen.java

public class Pen extends Item { private String color;

public Pen(double price, long uPC, String color) { super(price, uPC); this.color = color; }

public String getColor() { return color; }

public void setColor(String color) { this.color = color; }

public String toString() { return "Pen :: Color=" + color + super.toString(); }

public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((color == null) ? 0 : color.hashCode()); return result; }

public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (!(obj instanceof Pen)) return false; Pen other = (Pen) obj; if (color == null) { if (other.color != null) return false; } else if (!color.equals(other.color)) return false; return true; }

}

// Test.java

public class Test {

public static void main(String[] args) { //Creating instance of Book class Book b1=new Book("Java Programming","123-345-4567",45.50,123456789); Book b2=new Book("Java Programming","123-345-4567",45.50,123456789); //Displaying the Book class info System.out.println(b1); // Comparing the two Book class objects if(b1.equals(b2)) { System.out.println("Book#1 and Book#2 are same"); } else { System.out.println("Book#1 and Book#2 are not same"); } //Creating Instances of Pen class Pen p1=new Pen(3.45,234567888,"Red"); Pen p2=new Pen(2.45,234567888,"Blue");

//Displaying the Pen class info System.out.println(p1); System.out.println(p2); // Comparing the two Pen class objects if(p1.equals(p2)) { System.out.println("Pen#1 and Pen#2 are same"); } else { System.out.println("Pen#1 and Pen#2 are not same"); } }

}

The purpose of this assignment is to practice using polymorphism, interfaces and the compare To method. Problem Building on the class hierarchy from assignment 3: 1. Create an interface called Discount, which has 2 methods: + a. to calculate the sales discount for items in the store, and b. to set the discount amount for an item. C. Note the discount will not adjust the price variable of an item; it will reduce the price by the discount amount when the toString method is called (so the toString code must be changed). d. Note getPricel) will return the non discounted price.- 2. In the driver program, create an array of Items, containing at least 2 items of each type (Book, Textbook, Novel, and Pen). Using polymorphism display the details of each Item in the array. 3. Use a cast to access a Textbook and Pen in the array to do sets and gets for course and color. Show that the code works by producing suitable outputs. 4. Finally have the item class implement Comparable, and code the compareTo method to test the UPC code of items. Show that the compare To method can generate each of the 3 possible outcomes. You will need to do this through the child objects, since the parent is abstract.+ Notes: Child classes should call parent methods whenever possible to minimize code duplication. The driver program must test all the NEWmethods and functionality (ie see #3 above) in each of the classes and in the array created in the driver program. Include comments in your output to describe what you are testing, for example System.out.println("testing Book toString accessor and mutator); Print out some blank lines in the output to make it easier to read and understand what is being output. Assignment Submission:- Submit a print-out of eachclass file, the driver file and a sample of the output. Include a UML diagram also. Marking Checklist: 1. Does EACH class have all the usual methods? 2. Are all methods in EACH class tested, including child objects calling inherited parent methods? 3. Does the child class call the parent's constructor? 4. Does the child class override the parent's toString? 5. Does the child class override the parent's equals? 6. Have both interfaces been coded and tested correctly? 7. Has the Item array been coded and tested correctly? 8. Does the output produced have lots of comments explaining what is being output? 9. Does each class, and the output have blank lines and appropriate indenting to make them more readable