In Java:

Task 1

I. To compile an ILibraryBook interface for library service maintenance:

Methods:

o The book is borrowed by the reader argument: void get (Reader rdr);

o Book returns: void ret ();

II. To compile an IReader interface for reader service: The reader borrows (ret) the book (argument)

III. To compile a class Applicant hidden articles:

1. Hidden (Protected) members name, date of admission to university, success:

Name: String

date of birth:

success: double

Constructor:

o public Applicant (Date of birth, String name, double success)

Methods: get / set toString

IV. To compile a Student class, successor to the Applicant implementing Comparable hidden articles:

faculty number: String

Constructors:

o public Student (String name, String f_nom)

o public Student (Date date, String name, double success, String f_nom) {

Methods:

o get / set toString equals

V. To compile a Reader class, a successor to Student, implementing the IReader interface, Comparable:

1. Private members: LibraryBook

Collection of books

2. Explicit constructors:

public Reader (String nm, String fn)

public Reader (Date date, String name, double success, String f_nom)

3. Methods of reading / writing equivalence and string interpretation:

get / set, toString (), equals ()

VI. Create a LibraryBook class that implements ILibraryBook, Comparable:

public class LibraryBook implements ILibraryBook, Comparable

2. Private members:

Reader: Reader

Book name: String

Status: boolean

3. Explicit constructors

public LibraryBook (String bn)

public LibraryBook (String bn, boolean st)

4. Reading / writing, comparison and string interpretation methods:

VII. To compile a Main class with main function:

1. Creates a List of objects from VI

2. Simulates borrowing1 from a library, Displays;

3. Simulates borrowing2 from a library, Displays;

4. Sorts, displays

5. Checks for equivalence, outputs

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Task 2

I. Define classes for exceptions, null object and missing data for classes II

and III, IV. Apply them at your own discretion.

II. To compile a "Stock" class, packet access implementing Comparable

Private fields:

manufacturer

availability (count)

price

Constructors:

II.1 Implicit Explicit:

II.2. By manufacturer and availability;

II.3. Manufacturer.

Methods:

II. 4 Read and rewrite fields

II.5 Implementing the interface (optional)

II.6. Equivalence comparison

II.7 For string interpretation

III. Create an "InternalComponent" class that implements Stock.

Private fields:

frequency

Constructor:

III.1 Explicit

Methods:

III.2. String implementation

IV. To compile an "ExternalComponent" class inherits Stock.

Private fields:

inches

Constructor:

IV.1 Explicit

Methods:

IV.2. String implementation

V. To compile a class "Shop"

Private fields:

List of products, type Set, of objects of class I.

Constructor:

V.1 Default:

V.2. String implementation

V.3. Method of adding a new class I or class II product

V.4. Finding the manufacturer with the most products returns the name (s) of

manufacturer (s)

V.5. Finding the item with the best frequency returns the frequency

VI. Main function

VI.1 Creates a Class V object

VI.2 Finding the manufacturer with the most products

VI.3 Finding the item with the best frequency

VI.4 Handling exceptions