seycileli / LibraryUser

Library Application

LibraryUser

Scenario:

A library needs to develop an online application for two types of users/roles, Adults and children.

Both of these users should be able to register an account.

Any user who is less than 12 years of age will be registered as a child and they can borrow a “Kids” category book for 10 days, whereas an adult can borrow “Fiction” category books which need to be returned within 7 days.

Note: In future, more users/roles might be added to the library where similar rules will be enforced. Develop Interfaces and classes for the categories mentioned above.

Problem Statement 1:

1. Create an interface LibraryUser with the following methods declared

registerAccount requestBook

2. Create 2 classes “KidUsers” and “AdultUser” which implements the LibraryUser interface.

3. Both the classes should have two instance variables as specified below.

Datatypes/ Instance variables: int age, String bookType

4. The methods in the KidUser class should perform the following logic.

    1. registerAccount : if age < 12, a message displaying “You have successfully registered under a Kids Account” should be displayed in the console.  If(age>12), a message displaying, “Sorry, Age must be less than 12 to register as a kid” should be displayed in the console.  
   
    2. requestBook : if bookType is “Kids”, a message displaying “Book Issued successfully, please return the book within 10 days” should be displayed in the console.  else, a message displaying, “Oops, you are allowed to take only kids books” should be displayed in the console.  
   

5. The methods in the AdultUser class should perform the following logic.

    1. registerAccount : if age > 12, a message displaying “You have successfully registered under an Adult Account” should be displayed in the console.  If age<12, a message displaying, “Sorry, Age must be greater than 12 to register as an adult” should be displayed in the console.  
    2. requestBook : if bookType is “Fiction”, a message displaying “Book Issued successfully, please return the book within 7 days” should be displayed in the console.  else, a message displaying, “Oops, you are allowed to take only adult Fiction books” should be displayed in the console.  
   

6. Create a class “LibraryInterfaceDemo.java” with a main method which performs the below functions,

Test case #1: Create an instance of KidUser class. Set the age as 10 and invoke the registerAccount method of the KidUser object

Set the book Type as "kids" and "fiction" and invoke the requestBook method of the KidUser object

Test case #2: Create an instance of AdultUser class. 

Set the age as 18 and invoke the registerAccount method of the AdultUser object Set the book Type as "kids" and "fiction" and invoke the requestBook method of the KidUser object