You only can instantiate concrete classes, not abstract ones. But you can extend abstract classes as well as interfaces. (True/False)
Q: How do you define an interface and how do you use it in Java. what happens if an abstract class…
A: An interface is like a blueprint of a class. It consists of static variables and abstract methods.…
Q: True or False: An anonymous inner class must implement an interface or extend another class.
A: It can extend exactly one class and implement exactly one interface. It can extend exactly one class…
Q: How do you define a class that extends a superclass? What is super()? How do you invoke the…
A: Super() : The concept of inheritance is achieved in python through the super() function. The super()…
Q: hat is a default constructor, and how does it work? Is there a default constructor for every kind of…
A: Here I have given the default constructer and work of it.
Q: Describe what advantages interfaces have over abstract classes.
A: Computer Programming: Programming is the procedure of forming a set of instructions that directs a…
Q: What are the differences between abstract classes and concrete classes?
A: Abstract Class: Abstract class in java is declared by using keyword abstract. An object of abstract…
Q: Differentiate between abstract and concrete classes. Give examples from the scenario above
A: Please refer below for your reference: abstract and concrete classes differences are below:…
Q: Fill in the missing keyword to indicate a class inheriting from a interface: public class MyClass…
A: Here, I have to provide an answer to the above question.
Q: When dealing with objects inherited from other classes, when does explicit casting need to be used?
A: Explanation: Give an example of when it is required to utilise explicit casting when dealing with…
Q: Can a derived class (i.e., Subclass) directly invoke a private method of the base class (i.e., Super…
A: No. We can't derive a private method directly from it's base class Private access specifier allow…
Q: Abstract classes and interfaces can both be used to specify common behavior of objects. How do you…
A: Abstract class and interfaces both are features of object-oriented programming languages. These are…
Q: What is polymorphism? A: It is a way to allow subclasses inherit properties and functions from super…
A: Note: we are only allowed to solve one question in one post. I am solving the first on here. To get…
Q: You need a means of guarding against unintentional corruption of class fields.
A: Introduction Field protection: There are primarily two methods for field protection against…
Q: When would you utilize an abstract class? when you require a super class that shouldn't be…
A: An abstract class can be defined as a class that is not supposed to have objects of it's own. The…
Q: useful to use extension methods?
A: For Useful to use extension methods
Q: an a derived class (i.e., Subclass) directly invoke a private method of the base class (i.e., Super…
A: The given problem is related to Object-oriented programming where the Inheritance feature is being…
Q: For your application, explain the benefits of interfaces over abstract classes.
A: To accomplish abstraction, where we can declare the abstract methods, both abstract classes and…
Q: Is this statement true or false? The fields, attributes, and methods of the derived class are passed…
A: Derived class is also called as child class which is derived from another class which is called as a…
Q: Anonymous inner classes must implement interfaces or extend other classes in order to be considered…
A: Regular classes can implement any number of interfaces, while anonymous inner classes can only…
Q: Explain the advantages of interfaces versus abstract classes.
A: Introduction: Computer programming is the process of creating a set of instructions that tells a…
Q: Abstraction is the basis for good Object-Oriented design that is modular, reusable, and…
A: Interfaces may look like incomplete versions of abstract classes but they provide a flexible way of…
Q: Create java classes for concrete geometric shapes such as Circle, Rectangle, Triangle, etc. with…
A: It is defined as the programs can be asked from control statements, array, string, oops etc. Java…
Q: Why do you need to implement all the methods of an interface in class which implements an interface?
A: 1. In java Interface is nothing but a blue print of class has abstract methods and static final…
Q: I need help with this problem. Define objects for the Donkey Pong game, e.g. Mario, Gorilla, Cask,…
A: The answer is as follows.
Q: your class inherits from abstract classes or interfaces?
A: An interface contains a set of methods that haven’t been implemented. A class that references the…
Q: 1. Can you declare a class that contains abstract methods a non-abstract class? 2. Can you declare…
A: 1. No, the abstract methods can't be declared in non abstract class, it is the same reason you can't…
Q: Describe one advantage of requiring a class to implement an interface.
A: Interface is a user-defined data type which consists of abstract methods. It is used when different…
Q: Write the difference between interface and abstract class
A: Interfaces and abstract classes are features of object-oriented programming languages (Java, C#) The…
Q: To implement an interface, a concrete class must implement AT LEAST ONE method heading
A: The answer:
Q: Answer with True or False for the following. Explain your answers. -It is legal to write a method…
A: While overriding only occurs in an inheritance relationship, overloading can occur within the same…
Q: Can abstract classes also contain abstract properties?
A: “Yes”, an abstract class can also contain abstract properties. Justification: An abstract property…
Q: What is fundamental difference's between an abstract classes and interface (Write in maximum 5…
A: The answer has given below:
Q: You cannot instantiate an interface but you can do so to an abstract class. True False
A: Abstract Class: An abstract class is a class that is declared abstract. It may or may not contain…
Q: Describe how you can use an interface as an alternative to a class to specify the type for a…
A: Given:- Describe how you can use an interface as an alternative to a class to specify the type for a…
Q: Explain why you prefer interfaces over abstract classes.
A: Introduction: Interface: It is a blueprint/template of the class that has abstract methods and…
Q: s there any difference between abstract and concrete class? Give proper justification.
A: Abstract Class: An abstract class is a type of class in Java that is presentby abstract keyword. An…
Q: What is the output of the following code? Convert the abstract class into an interface and modify…
A: To do: Output of the given code
Q: Dilowing code shippet oI Object public interface Measurer { double measure (_?. anobject); Complete…
A: 11. Consider the following code snopet of a function object public interface Measurer{ double…
Q: Anonymous inner classes must implement interfaces or extend other classes.
A: Anonymous inner classes are required to implement interfaces or extend super classes at all times.…
Q: s it true or false? The base class inherits the derived class's fields, properties, an
A: Required: Is it true or false? The base class inherits the derived class's fields, properties, and…
Q: State a circumstance in which you would prefer an interface over an abstract class. Also, State a…
A: Since Interfaces doesn't exist in C++ but in Java, they do. in Java, I would use an interface when…
Q: Write a class about Aeroplane. Obviously, you will require other helper classes to complement your…
A: Code :- class AeroplaneService { public void startService() {…
Q: When should you use an abstract class? Group of answer choices 1. All options are correct. 2.…
A: Answer: when abstract class use then two or more classes can share identical method so option 2 is…
Please answer both. Thank you.
Step by step
Solved in 2 steps
- Differentiate between abstract and concrete classes. Give examples from the scenario above(Java) Question 5 Explain the answer step-by-step and include verbal explanation. Thank you! Write an interface as follows: The interface is named ServiceReminder It has one method named timeForService that has no parameters and returns a boolean variable. Now, update the below class so that is inherits from ServiceReminder Note that the next service date should be 90 days from the last service public abstract class Car { private double gasGauge; private double currMileage; private String color; private String make; private String model; private int daysLastService; public Car(String color, String make, String model, int daysLastService) { this.color = color; this.make = make; this.model = model; gasGauge = 0.0; currMileage = 0.0; this.daysLastService = daysLastService; } @Override public String toString() { return "Make: " + make + "\nModel: " + model + "\nColor: " + color…Abstract classes and interfaces may be used interchangeably to specify the behavior of objects.How do you know whether you need an interface or an abstract class?
- 1. Why do you need to implement all the methods of an interface in class which implements an interface?Answer By True or False , JAVA LANGUAGE A Java interface can contain only constants and abstract methods. A class that implements an interface can define only the methods that are included in the interface. A static variable can be referenced only from a static method. Static variables are also called class variables.Make 3 choices. Which of the following are incorrect? Select 3 correct answer(s) An abstract class contains constructors. The constructors in an abstract class should be protected. The constructors in an abstract class are private. You may declare a final abstract class. An interface may contain constructors.
- Explain why you prefer interfaces over abstract classes.Explain why accessors to private types are preferable than make the types public for the following three reasons.Which of the following statements are true. a) An abstract method contains a signature but no code implementation. b) We cannot create an instance of an abstract class by using the new operator. c) We can derive classes from an abstract class, but we must provide code to implement all of the abstract methods. d) All of the above statements are true.
- Description: Create a class named ComparableDog that extends Animal and implements Comparable interface. Implement the compareTo method to compare the Dogs on the basis of age. Write a test class to find the bigger age of two instances of ComparableDog Objects, and complement the ComparableDog class with the missing part. 1) The test program, the ComparableDog class, and its super class Animal are given as follows. // Main method public static void main(String[] args) { // Create two comparable Dogs ComparableDog dog1 = new ComparableDog(3); ComparableDog dog2 = new ComparableDog(4); System.out.println("Dog1:" + dog1); System.out.println("Dog2:" + dog2); if(dog1.compareTo(dog2) == 1) System.out.println("Dog1 is older than Dog2"); else if(dog1.compareTo(dog2) == -1) System.out.println("Dog1 is younger than Dog2"); else System.out.println("Dog1 and Dog2 have the same age"); }…Differentiate between static and instance class members. Explain with proper example when you should make members static?Example in Java Write and use classes with instance variables and their getters and setters. static and/or constant data default and overloaded constructors methods and overloaded methods toString() equals() 7. aggregation