An interface can have :   instance variables.   only method headings without implementation.   some methods with implementation.   only one constructor.

Q: Create an interface that shall have 2 methods and one string type attribute, also create an…

A: Given: We are given a problem where we have to design an interface that contains 2 methods declared…

Q: Create an interface that shall have 2 methods and one string type attribute, also create an…

A: Here I have first of all created an interface and in the interface, I have defined 2 methods and one…

Q: Define an interface Frame with methods paint, redraw and fields width, height, title. Provide…

A: Falls under Java Programming. To define an Interface Frame along with its methods and also show its…

Q: When a class implements an interface with default methods and overrides them, the class inherits the…

A: When a class implements an interface with default methods and overrides them, the class inherits the…

Q: for the class Student that contains 3 attributes: name, studentNumber and course.     You are to…

A: package anagram;public class Student{    private String name;    private int studentNumber;…

Q: We simply need one method speak() to print out the way that the animal “speaks”. Put the method…

A: public interface Speakable { public void speak(); }

Q: Is it possible for a method within an interface to be marked as final? Why or why not?

A: Access Modifiers that include private, public, protected and default are basically  the keywords…

Q: Is it possible for a method within an interface to be marked as final? Why or why not?

A: Program: Programs are used to read the input from the user and process it accordingly and return the…

Q: Create an interface that shall have 2 methods and one string type attribute, also create an…

A: Here I have first of all created an interface and in this interface, I have declared 2 methods and…

Q: Consider the following class definition: public class MyClass private int value; public void set…

A: Answer: Given Code is: public class MyClass { private int value; public void setValue(int i){ }

Q: Create an interface containing three methods, in its own package. Implement the interface in a…

A: Program   area.java package areas; interface area{    double pi=3.14;    double computecircle(double…

Q: Create an interface containing three methods, in its own package. Implement the interface in a…

A: Save it in p_one.java package p_one;class Declarations{   public void method()   {…

Q: True or False? Interface can be used to store a common method implementation.

A: The question is about whether an interface can have a common method implementation in it or not. Can…

Q: Consider the following class definition: public class MyClass private int value; public void…

A: We need to assign the value of i to the variable value. But in the option c, the operator is not…

Q: Consider the following class definition: public class MyClass private int value; public void set…

A: Lets discuss the solution in the next steps

Q: 2. Is it possible for a method within an interface to be marked as final? Why or why not?

A: In the Java programming an interface is an abstract type that specifies a behavior that classes must…

Q: Write the implementation of the methods of the StaticDemo class. In its constructor, the id value of…

A: 1. create a class StaticDemo 2. create static idGenerator, id as private variables 3. create the…

Q: True or False An interface can contain only abstract methods and constants.

A: solution:True

Q: Answer By True or False , JAVA LANGUAGE A Java interface can contain only constants and abstract…

A: Object oriented programming also abbreviated as OOPS as a programming pattern based on the concept…

Q: Question 4: You have an interface ICar, with a method drive(); a. You have classes BMW, and Mercedes…

A: An interface in the Java programming language is an abstract type that is used to specify a behavior…

Q: Question 4: You have an interface ICar, with a method drive(); a. You have classes BMW, and Mercedes…

A: I give the code in java as per your requirement along with code screenshot and output screenshot

Q: An interface must meet which of these restrictions? I. It must not have any fields. II. Methods…

A: NOTE Below is the answer for the given question.  Hope you understand it well. If you have any…

Q: Assume you have three interfaces I1, I2 & I3. The definition of these three interfaces is given…

A: The Following scenario is implemented in Java. The user can use any other language just change the…

Q: Create a class, CallClass, with two methods to show call by value and call by reference. One method…

A: Java Code: Java code that has a class which have two methods. One method takes call by value and…

Q: The Factory method design pattern is advantageous since it enables dynamically creating new objects…

A: Answer: The answer is TRUE

Q: 1. A Java interface can contain only constants and abstract methods. 2. A class that implements an…

A: Java is a programming language. It contains extensive libraries (package). It can be used to create…

Q: In many card games, cards are either face up or face down. Add a new instance variable named faceup…

A: Programming is a way to instruct the computer devices to operate. Every computer needs a set of…

Q: Given the following class diagram, write an anonymous class to override the toString0 method of the…

A: Objective: This program develops a class called "Engine" by using given specifications. The method…

Q: What is fundamental difference/s between an abstract classes and interface (Write in maximum 5…

A: Note As per BNED rules we are allowed to answer 1 question at a time if you want the response of…

Q: What is fundamental difference/s between an abstract classes and interface (Write in maximum 5…

A: In the below  sections,  the basic differences between an abstract class and interface are…

Q: To implement an interface, a concrete class must implement AT LEAST ONE method headings listed in…

A: Required: To implement an interface, a concrete class must implement AT LEAST ONE method headings…

Q: What is dynamic method lookup? Question options: Dynamic method lookup is the process of…

A: Dear learner, hope you are doing well, I will try my best to answer this question. Thank You!!

Q: Draw the UML diagram for the class and then implement the class. For more details about UML diagrams…

A: It is defined as the graphical representation of the class. It appears in the topmost compartment. A…

Q: Draw the UML diagram for the class and then implement the class. For more details about UML diagrams…

A: To test the written Square class methods we need to create an instance and it is always best…

Q: When we want to add new methods to superclass that don’t necessarily make sense to every subclass.…

A: In the given statement instance variable functionality is defined. So, the design pattern for…

Q: A class can have how many constructor methods?     Only one constructor without parameters.…

A: d.) Many constructors with different signatures

Q: In Java, which of the following is false? An abstract class may implement an interface. A class…

A: Correct option is TRUE because an abstract class can provide the implementation of interface.

Q: What methods are polymorphic in the Employee Hierarchy? How could we build a method like…

A: Implemented the Circle and Square subclasses. And modified the PolyDemo class to use them. Use the…

Q: Define an interface named shape with a single method named area that calculates the area of the…

A: An interface contains variables and methods like a class but the methods in an interface are…

Q: Explain through each question about Classes and Objects in Java.  What is encapsulations and why is…

A: Encapsulation- Encapsulation is a process of wrapping up of data and code into a single unit. An…

Q: The behaviour of the instances present of a class inside a method is defined by

A: Question. The behaviour of the instances present of a class inside a method is defined by _____.

Q: The behaviour of the instances present of a class inside a method is defined by

A: Question. The behaviour of the instances present of a class inside a method is defined by…

Q: 1/ Write a BankAccountTester class whose main method constructs a bank account, deposits $1,000,…

A: 1. BankAccountTester.java public class BankAccountTester {     public static void main(String…

Q: s has a subclass encapsulating a parallelepiped, or box. A parallelepiped has a rectangle as its…

A: gIVEN 2-) Write a superclass encapsulating a rectangle. A rectangle has two attributes representing…

Q: Look carefully at how messages and mailboxes are represented in the email system that you use. Model…

A: Ans:) The system representation along with object classes is explained below.

Q: In the following code: public interface Shape extends Comparablel double getArea0: We have: Select…

A: Given, public interface Shape extends Comparable<Circle>{ double getArea(); } In Java when an…

Q: Write a class called widget with an dollars; those values are passed in when a widget is created.…

A: class Widget:    name = ""    cost = 0        def __init__(self, name, cost):        self.name =…

Q: A class called MyPoint, which models a 2D point with x and y coordinates, is designed as shown in…

A: A class called MyPoint, which models a 2D point with x and y coordinates, is designed as shown in…

Q: A class called MyPoint, which models a 2D point with x and y coordinates, is designed as shown in…

A: According to the information given:- We have to create a class named MyPoint, Models a 2D point with…

Q: In programming, there are two ways of creating classes, interfaces, and abstract classes. Contrast…

A: - The question is to know about the Differences in interface and abstract classes.