1. What are getters and setters? Give an example of each. 2. What is encapsulation? 3. What is a constructor and when is it executed? What does it usually do?
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OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
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- Define the following terms with the help of examples: Encapsulation Constructor.Java- Suppose that Vehicle is a class and Car is a new class that extends Vehicle. Write a description of which kind of assignments are permitted between Car and Vehicle variables.I have multiple constructors defined in a class. Is it possible to call a constructor from another constructor’s body?
- What happens if you try to override a non-virtual or final method in a derived class?Can we make constructor STATIC?Create a deck of cards class. Internally, the deck of cards should use another class, a card class. Your requirements are: The Deck class should have a deal method to deal a single card from the deck After a card is dealt, it is removed from the deck. There should be a shuffle method which makes sure the deck of cards has all 52 cards and then rearranges them randomly. The Card class should have a suit (Hearts, Diamonds, Clubs, Spades) and a value (A,2,3,4,5,6,7,8,9,10,J,Q,K)
- Make sure you know the difference between an abstract class and an interface and constructors.Person and Customer Classes Write a class named (Person) with data attributes for a person’s name, address, and telephone number. Provide accessors/getters and mutators/setters for each attribute. Write a displayPerson() to print out the attributes of the Person. Next, write a class named (Customer) that is a subclass of the (Person) class. The (Customer) class should have a data attribute for a customer number, and a Boolean data attribute indicating whether the customer wishes to be on a mailing list. Provide accessors/getters and mutators/setters for each attribute. Write a display customer() to print out the attributes of the Customer. Demonstrate an instance of the (Customer) class in a simple program.Can we declare a class as Abstract without having any abstract method?
- 1. What is the purpose of constructors? 2. Can you freely choose the identifier (i.e., name) of a constructor (like, for example, for methods)? 3. Write a possible constructor declaration for class School. Note that its body may even be emtpy. 4. How many constructors can a class have? 5. Do all classes have at least one constructor?1. Why do you need to implement all the methods of an interface in class which implements an interface?Define a constructor to display a message?