Question

Write a java application that should have a menu system along the following lines (you can have sub-menus if you deem that to be necessary)

1) Ask the user how many books their application should store • The application then creates a suitable storage component for the books (i.e. an array of Book objects)

2) Add book details • You as the reader can add details of a book here (i.e. a Book object’s properties are given values).

3) Display details of a book • The application should output the details of a book based on the user entering in the title of the book

4) Display all the Books • All the books should be displayed

5) End application • The user can exit the application

Functional Requirements Your Java program must have the following:

• A Book class with appropriate properties and methods (including get and set)

• Appropriate use of methods for the menu system • Appropriate use of loops 3 • Appropriate use of a toString method in the Book class

• Appropriate use of validation of user entry

• Appropriate use of comments

• An application class that will run the menu described in the scenario

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
=================================

// Book.java

public class Book {
   // Instance data
   private int pages;
   private String title;

   // Constructor with parameters
   public Book(int p, String t) {
       pages = p;
       title = t;
   }

   // Getter methods
   public int getPages() {
       return pages;
   }

   public String getTitle() {
       return title;
   }

   // Setter methods
   public void setPages(int myPages) {
       pages = myPages;
   }

   public void setTitle(String myTitle) {
       title = myTitle;
   }

   // Printing method
   public String toString() {
       return "Title: \"" + title + "\" Pages: " + pages + " pages";
   }

   // Comparison methods
   public boolean equals(Book b) {
       if (pages == b.getPages() && title.equals(b.getTitle())) {
           return true;
       } else {
           return false;
       }
   }

   public int compareTo(Book b) {
       if (pages < b.getPages()) {
           return -1;
       } else if (pages > b.getPages()) {
           return 1;
       } else {
           return 0;
       }
   }
}

=====================================

// Test.java

import java.util.Scanner;

public class Test {

   public static void main(String[] args) {
       int size, cnt = 0;
       /*
       * Creating an Scanner class object which is used to get the inputs
       * entered by the user
       */
       Scanner sc = new Scanner(System.in);

       System.out.print("How many books you wnt to add ? ");
       size = sc.nextInt();

       Book b[] = new Book[size];

       while (true) {
           System.out.println("\nMenu");
           System.out.println("1.Add Book");
           System.out.println("2.Display Book");
           System.out.println("3.Display All");
           System.out.println("4.Quit");
           System.out.print("Enter Choice :");
           int choice = sc.nextInt();
           switch (choice) {
           case 1: {
               sc.nextLine();
               if (size != cnt) {
                   System.out.print("Enter Book title :");
                   String title = sc.nextLine();
                   System.out.print("Enter no of pages :");
                   int noOfPages = sc.nextInt();

                   Book bk = new Book(noOfPages, title);
                   b[cnt] = bk;
                   cnt++;
                   System.out.println("\n** Book Added Successfully **");
               } else {
                   System.out.println("\n** Array is full **");
               }

               continue;
           }
           case 2: {
               sc.nextLine();
               System.out.print("\nEnter Book title to search for :");
               String title = sc.nextLine();
               int pos = search(b, cnt, title);
               if(pos==-1)
               {
                   System.out.println("** Book not found **");
               }
               else
               {
                   System.out.println(b[pos]);
               }
               continue;
           }
           case 3: {
               System.out.println("\nDisplaying all books info :");
               for(int i=0;i<cnt;i++)
               {
                   System.out.println(b[i]);
               }
               continue;
           }
           case 4: {
               break;
           }
           default: {
               System.out.println("** Invalid Choice **");
               continue;
           }

           }
           break;
       }

   }

   private static int search(Book[] b, int cnt, String title) {
       for (int i = 0; i < cnt; i++) {
           if (b[i].getTitle().equalsIgnoreCase(title)) {
               return i;
           }
       }
       return -1;
   }

}

====================================

Output:

How many books you wnt to add ? 5

Menu
1.Add Book
2.Display Book
3.Display All
4.Quit
Enter Choice :1
Enter Book title :Database Management
Enter no of pages :450

** Book Added Successfully **

Menu
1.Add Book
2.Display Book
3.Display All
4.Quit
Enter Choice :1
Enter Book title :Ansi C
Enter no of pages :450

** Book Added Successfully **

Menu
1.Add Book
2.Display Book
3.Display All
4.Quit
Enter Choice :3

Displaying all books info :
Title: "Database Management" Pages: 450 pages
Title: "Ansi C" Pages: 450 pages

Menu
1.Add Book
2.Display Book
3.Display All
4.Quit
Enter Choice :2

Enter Book title to search for :Ansi C
Title: "Ansi C" Pages: 450 pages

Menu
1.Add Book
2.Display Book
3.Display All
4.Quit
Enter Choice :4

=====================Could you plz rate me well.Thank You