Problem Statement Defining Classes Write and document the definition for the Product class. The Product class represents an item that for sale on a Web site or in a department store (like a toaster). would appear Product Class B Fields description : String price : double productNumber : int B Methods 9 getCost(int aty): double O Product(int pNum, String pDesc, double price) O setDescription(String newDesc): void 9 setPrice(double newPrice) : void * tostring) : String • Each Product object has three instance variables: description, productNumber and price. • The class has one constructor that takes three parameters in the order productNumber, description and price. • The class has one accessor method named getCost(int qty) which returns the price for qty items of the Product. • The class has two mutator methods-setPrice() and setDescription()-that modify the corresponding instance variables. • The class has a toString() method that returns the Product as a String in the form: 34567: Small Toaster, $ 17.95. Note: use concatenation to construct the returned string. Do not use the String.format() method to format the returned value.

Java Program(OOP)

Java please

Don't give me AI generated answer or plagiarised answer. If I see these things I'll give you multiple downvotes and will report immediately.

Write a java program as shown in the following UML class diagram:(read the details below)

java

// The language is java please do question #9

Design, implement and test a class that can be used to hold information about a musical note. Test it with an appropriate driver program. DESIGN REQUIREMENTS A programmer MUST be able to set and retrieve the length of the note and the value of the note. The length of a note may be a sixteenth note, eight note, quarter note, half note, or a whole note.  The note’s value is an integer. it is specified by counting how far the note lies above or below the A note that orchestras use in tuning   ( https://en.wikipedia.org/wiki/A440_(pitch_standard)  if needed to check )   . In counting "how far", you should count every key, both the white and black notes on a piano. So the A note above Middle C would have a value of 0. The A note one octave above that would have a value of 12. The default constructor should set a note to a A440 (an A note of frequency 440Hz) quarter note. Include methods to set a note to a specified length and value. Write methods to retrieve information about a note,…

why might we write public get and set methods for private properties? hint: you may want to do a quick internet search for "java getters and setters pros and cons." 1. these public methods give us a way to read and write the values of these properties in a controlled way 2. they make a program run more efficiently 3. if we didn’t, there would be no way to read or write the values of the properties 4. object-oriented languages require us to do this

Create a short program in Java which contains the below information: - Has one abstract and two regular classes  - Has two interfaces (the two regular classes have to implement at least one interface - At least one regular class must implement both interfaces  - The two classes have to extend the abstract class - The abstract class must have a method - At least one interface must have a method - At least two fields in each class, this includes the superclass - All fields are instantiated within the constructor