Given the following interfaces: public interface Inter1 { public abstract void m10%3; public abstract void m20; public interface Inter2 extends Inter1 { public abstract void m30; public interface Inter3 extends Inter1 { public abstract void m40; If you are asked to define a concrete class caller
Q: What is the output of the following code? public interface finalExam { int x = 10; void…
A: The code snippet declares an interface finalExam with x=10 and two abstract methods finalMethod()…
Q: A subclass of an abstract class must implement all of the parent class's abstract methods. Is it…
A: When an abstract class is subclassed, the subclass usually provides implementations for all of the…
Q: Describe the advantages of using interfaces over abstract classes.
A: Programming: Programming is the methodology of framing a bunch of guidelines that guide a computer…
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.
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: Explain the following Java Interface code in details. interface A { public void m1(); } abstract…
A: CODE :- interface A{public void m1();}abstract class B{public B(){System.out.println("Inside the…
Q: with an abstract method ‘fareCharged()’. $10, $15 and $20 are the fares charged by Bus, Auto and Cab…
A: Create an abstract class ‘Fares’ with an abstract method ‘fareCharged()’. $10, $15 and $20 are…
Q: Create an abstract class ‘Fares’ with an abstract method ‘fareCharged()’. $10, $15 and $20 are the…
A: Note: since programming languages is not specified. we are providing solution in java. please repost…
Q: An interface can have : instance variables. only method headings without implementation.…
A: Refer to step 2 for the answer.
Q: An abstract class can extend another abstract class and implement multiple interfaces.
A: Because Classes can only extend from one other class, but can implement multiple interfaces.
Q: To implement an interface, a concrete class must implement AT LEAST ONE of the method headers…
A: A concrete class is one in which all of its methods have been implemented. They can't have any…
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 should an abstract class be used, when should an interface be used, and when should both be…
A: According to the provided information: We need to define the use of an abstract class, interface…
Q: You can make a class abstract by declaring it with keyword abstract. An abstract class normally…
A: An abstract class is a class which can have 0 or more abstract methods An abstract class is declared…
Q: What is the output of the following code? public interface finalExam { int x = 10; void…
A: Hello student. Warm welcome from my side. Hope you are doing great. I will try my best to answer…
Q: lollowiing 1isw ic interface T1 { public static final int z =1; public abstract void q(); c…
A: 1. Yes both are correct both are working well static means that instead of each instance of the…
Q: Given the following definitions: public abstract class Manager extends Employee { ... } public class…
A: Introduction: Class is one of the concepts in the object-oriented programming paradigm and it’s…
Q: In Java 1. Can you have a variable of an interface type? Can you have a parameter of an interface…
A: Can you have a variable of an interface type? Can you have a parameter of an interface type?…
Q: A subclass of an abstract class is required to implement all of the abstract methods of the parent…
A: Abstract class :- Class that is declared abstract is known as abstract class it can have both…
Q: Given the following definitions: public abstract class Manager extends Employee { } public class…
A: Answer: We have explain some classes in java in brief explanation
Q: Modify the given codes to remove the compilation errors. 1. public interface Carnivore {…
A: Answer: Ans-1: The code will not compile and it will be given you the two compile-time errors…
Q: choose the right answer to overcome the error public abstract class LabFinalExam 3 { public static…
A:
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: An abstract class's parent class's abstract methods must all be implemented by its subclasses. Is it…
A: Abstract class's parent class's abstract methods: An abstract class is a class that is declared…
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: public abstract class Landmark { public abstract int countVisitors(); } Consider the class shown…
A: Data Abstraction is an OOP concept that hides the background details. It shows only those…
Q: What is fundamental difference/s between an abstract classes and interface
A: Note- since you did not mention, we assume that you asked question in reference to java programming…
Q: Find the Error. interface DAO{ public double getMax(); public abstract double getAverage(); }…
A: In the above program we will get an error at double res=h.getMax(); this is because in human h=new…
Q: A subclass of an abstract class must implement all abstract methods of the parent class. True or…
A: A class that is declared using “abstract” keyword is called abstract class. It can have abstract…
Q: The top level class of creators in the abstract factory is a(n) Select one: O a. concrete class b.…
A: The top level class of creator in the abstract factory is a(n)
Q: To implement an interface, a concrete class must implement AT LEAST ONE method heading
A: The answer:
Q: An object can be created from an abstract class is it true or false
A: Ans : False that An object can be created from an abstract class.
Q: What is fundamental difference's between an abstract classes and interface (Write in maximum 5…
A: The answer has given below:
Q: An abstract class's parent class's abstract methods must all be implemented by its subclasses. Is it…
A: Abstract class is a restricted class that cannot be used to create objects.
Q: 1. Define an interface Measurable. It has a single abstract method: double getArea(); 2. Define an…
A: PROGRAM EXPLANATION: Create an interface Measurable. Declare an abstract method in this interface.…
Q: 4. public abstract class Test2 { private int x private int y; public abstract void display(); public…
A: Abstract class containing abstract method doesn't contain method body. Abstract class can't…
Q: In the following statement: public abstract class Vehicle extends DD implements Car{ ...} DD can…
A: The correct answer of the questions is option "TRUE"
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: 2. In a Java class, toString method is implicitly inherited from: Object class interface abstract…
A: toString() method is used to get string representation of object. It gives classname followed by a @…
Q: ds in an abstract class must be overriden and implemented classes only become useful when we create…
A: Answer is given below.
Q: What are the differences between abstract classes and interfaces?
A: Abstract class and interface both are utilized to accomplish deliberation where we can proclaim the…
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: Please define two interface Auto and Sprinkler, and three classes Car, Truck and FireTruck. Car and…
A: Code: interface Auto{ public abstract void move(); public abstract void stop(); public…
Q: public abstract class Landmark { public abstract int countVisitors(); Consider the class shown…
A: The answer is given below.
Q: This example asks you to write an interface. Then define three classes that implement this…
A: Program that defines three classes that implement the given interfaces in the question. Class: A…
Q: 1- public class Student { 2 3 public abstract double calcScore(); 4 5 } Which of the following is…
A: The given code is a java code snippet where a Student class is created. The student class has method…
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- The interface Range is defined below:public interface Range{ void setLimits(int x, int y); int getNumber();}Implementations of Range should exhibit the following behaviour:• The setLimits method should store its parameter values somewhere to serve as the lower and upper limits of the range appropriately.• A call to getValue should return an integer that is always greater than or equal to the lower limit and less than or equal to the upper limit.The class RandomInteger is an implementation of the interface Range. It also has the following features:• It has two fields of int type, low and high, to record the lower and upper limits of the range, respectively.• It has single constructor method that takes two integers and stores them in the appropriate fields. Note: You should make use of the setLimits method.• A call to the method getNumber should return a random number that is always within the range, i.e. greater than or equal to the lower limit and less than or equal to the upper limit.…To implement an interface, a concrete class must implement AT LEAST ONE method heading.False.True.Purpose To review interfaces Directions Your task for this lab is to implement and test a class to store ratings of items. Your Rating class should have the following fields and methods: private double sumOfRatings - the sum of all of the ratings private int raters - the number of people who have rated an item public Rating () initialize both fields to zero public Rating (double sumofRatings, int raters) - initialize the fields to the parameter values public void addRating (double newRating) - increase the sumOfRatings by newRating and increase the number of raters by one public double getAverageRating () return the average rating; if there are no raters so far, return 0.0 public String toString() - display the average rating and how many reviews it is based on; for example, if the sum of the ratings is 32 and that is based on ratings from ten people, the toString method will return "3.2 based on 10 reviews"
- java Design an interface named Encryptor that has a single (abstract) method named encrypt with one String argument named message. The method should return a String (which will be the encrypted message). Design a class named EncryptorOne that implements the Encryptor interface, and with one int instance variable named shift. The constructor should have one parameter to initialize the shift. Implement the method encrypt so that each letter of the message sent as the argument (with lowercase letters) is shifted by the value in shift. For example, if shift is 3, a will be replaced by d, b will be replaced by e, c will be replaced by f, and so on with a wraparound (i.e. with shift 3, x will be replaced by a, y will be replaced by b, and z will be replaced by c). The method should return the modified version of the message. (HINT: The value of a character literal is the integer value of the character in the Unicode character set. So, adding an integer (say, shift) to a character and…An enumeration can contain public constant variables O True O False An interface can extend as many interfaces as the programmer wants O True O False An abstract class must contain at least 1 abstract method O True False#Testing Please test my code and see if it meet the follwing needs: The class should implement the Comparable interface. Circle one is less than Circle two if the radius of Circle one is less than the radius of Circle two. The two Circles are equal if they have the same radius. Circle one is larger than Circle two if its radius is larger. If circle One.compareTo circle Two <> 0 The Test Class displays a menu that allows the user to: Enter a Circle (the user only needs to enter the radius). Print all Circles (print the toString for each Circle in the ArrayList). Quit To adda a circle Cases: The ArrayList is empty The new circle is less than the first circle, add it at the beginning. The circle is greater than the last circle, add it at the end The new circle belongs somewhere in the middle. import java.lang.Math;public class Circle implements Comparable<Circle> {private double radius;public Circle(double radius) {this.radius = radius;}public double findArea()…
- You need 5 java classes and these include Netflix Class (Parent class of Movie and TVShow class) Movie Class TVShow Class Test/TestDriver Class Database Class Please read the questions carefully. TestDriver is given for the other image.Design a GUI for Book view class for the following Library Information System, which you have worked on 1 with the following details: Library Item Class Design and TestingDesign a class that holds the Library Item Information, with item name, author, publisher. Write appropriate accessor and mutator methods. Also, write a tester program that creates three instances/objects of the Library Items class. Extending Library Item Class (Library and Book Classes): Extend the Library Item class in (1) with a Book class with data attributes for a book’s title, author, publisher and an additional attributes as number of pages, and a Boolean data attribute indicating whether there is both hard copy as well as eBook version of the book. Demonstrate Book Class in a Tester Program with an object of Book class.3. The interface Range is defined below:public interface Range{ void setLimits(int x, int y); int getNumber();} Implementations of Range should exhibit the following behaviour:• The setLimits method should store its parameter values somewhere to serve as the lower and upper limits of the range appropriately.• A call to getValue should return an integer that is always greater than or equal to the lower limit and less than or equal to the upper limit.The class RandomInteger is an implementation of the interface Range. It also has the following features:• It has two fields of int type, low and high, to record the lower and upper limits of the range, respectively.• It has single constructor method that takes two integers and stores them in the appropriate fields. Note: You should make use of the setLimits method.• A call to the method getNumber should return a random number that is always within the range, i.e. greater than or equal to the lower limit and less than or equal to the upper…
- Analyze the following JavaFX program and complete the missing code based on the comments. The Program should show window like this. public class EmployeeInterface extends Application{ @Override public void start(Stage stage) throws Exception { 1- // Create a boreder Pane object 2- // create HBox object 3- // create the two command button objects 4- // add command buttons in the HBox object 5- // create grid pane object 6- // create the label and TextField for the name and add them in the first row in the grid pane 7- // create the label and TextField for the Major and add them in the first row in the grid pane 8- // Put the commands in the buttom of the BorderPane 9- // Put the GridPane which contain student information in the center of BorderPane 10- // create the Scene Object and it set it as stage…Java - Interface 1. Create an interface Employee which has the attribute: rate, and the method getSalary(). 2. Implement the Employee interface with two classes: Hourly and Commissioned. 3. Hourly employee has the following additional attribute: hoursWorked. Hourly wage is 300 money. 4. Commissioned employee has the following additional attribute: itemSold. Commissioned employees get 200 money per item sold. If item sold is greater than 100, any items sold after 100 has +10 money bonus. Inputs 1. First line contains the type of Employee (H or C) 2. Second line is for the hours worked or the items sold depending on the type of employee Sample Output Enter type of employee: H Enter hours worked: 10 Salary: 3000Q# A program that has no graphical user interface and only takes input through the command line only has a model and a controller. It does not have a view. The answer: is FALSE. Please explain with example. Q# What is NOT an effect of the SOLID principles? The answer: A high-level class depends on specific low-level classes and not interfaces. Please explain why. Q# Assume you are considering writing a method and are deciding what should happen when given input that is outside of perfect input. Which of the following is not a way to handle this? Answer: Use better JUnit testing. Subject: Java Programming