Create a class, CallClass, with two methods to show call by value and call by reference. One method has two parameters that are any primitive types, whereas the other has a parameter that is an object of any class. Create a CallClassTest class that calls the two methods with proper arguments to show call by value and call by reference
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Create a class, CallClass, with two methods to show call by value and call by reference.
One method has two parameters that are any primitive types, whereas the other has a
parameter that is an object of any class. Create a CallClassTest class that calls the two
methods with proper arguments to show call by value and call by reference
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- Write a full class that represents a Phone, described by a name, price, and then whether the phone comes enabled with Bluetooth. The default value is that most phones come enabled. Include instance data, one or more constructors, getters and setters, a toString, and an equals method. Required validation for the variables Implement the Comparable interface. Order phones based on name and then price. Show make the driver in a different class to test the methods using user-inputWhich of the following statements are false? (All that are not true). Group of answer choices A reference of type super class can refer to an instance of type subclass. A reference of type subclass can refer to an instance of type super class. A method in the super class can be overridden two different ways in two different subclasses. A method in the super class can be overridden by changing its signature in the subclass.Create an interface that shall have 2 methods and one string type attribute, also create an implementation class of the interface that shall define both methods (you can print YOUR favorite quote in each method body).
- Define a class Job which has three property (name, salary, description) and two behavior (getSalary, getLengthOfName) 1- Write two constructor method for the following class? 2- Implement following interface?Write a superclass called ؛Person (as shown in the class diagram), whichcontains:• Two instance variables name (String) and address (String).• Two constructors: a (no-argument) constructor that initializes the name to "Ahmed"and address to “Gaza”, and a constructor that initializes the name and address tothe given values.• Getter and setter for all the instance variables.• A toString() method that returns "A Person with name of xxx and addressof yyyWrite a test program to test all the methods defined in Person.Write two subclasses of Person called Student and Staff, as shown in the class diagram.The Student class contains:• An instances variable program (String), year(int) and fee(double) .• One constructor as shown.• Getter and setter for the instances variable program , year and fee.• Override the toString() method inherited, to return "A Student with [name,address],[program,year and fee].The Staff class contains:• Two instance variables school (String) and pay (double).• One…Consider a class PersonAddress that represents an entry in an address book. Its attributes are The first name of the person The last name of the person The e-mail address of the person The telephone number of the person It will have methods to Access each attribute Change the e-mail address Change the telephone number Test whether two instances are equal based solely on name Write a method heading for each method. Write preconditions and postconditions for each method. Write some Java statements that test the class. Implement the class.
- Write a complete program for the description given below. Consider a Billing class that implements an interface Payable having a method getTotalPayment Amount(). Besides this, you have a Doctor class with private instance variables (docID, docName, and docFee) and a public getDoc() method, Patient class with private instance variables (pName, pID. pDisease), Medicine class with private instance variables (medID, medName, medQty, medPrice), and Medical Test class with private instance variables (testID, testName, testPrice). Each of these classes has the toString() method to display the information of its object. The Billing class is having "Has A" relationship with the other four classes (Doctor, Patient, Medicine, and MedicalTest) mentioned above. The getPayment Amount() method of Billing class returns the total billing amount that includes doc fee, medicine cost, and medical test fee that a patient has to pay. After implementing these classes, you are required to do the following in…What is an abstract class? Choose only one option.(a) An object(b) A class with no methods.(c) A class with no concrete subclasses.(d) A class with at least one undefined message.(e) An interface.Create a parent class Person with one attribute age and one method greet() that prints out "Hello, world!". By default, the age is 20. Then create a subclass CollegeStudent that inherits from Person and has its own attributes School_Name and Major. Then create an object (a college student, his name is Harry, age is 21, School_Name is "Felician University", and Major is "Computer Science"), then let Harry say"Hello World!".
- Are the fields in the following interface class fields or instance fields? public interface Quiz { int CORRECT = 1; int INCORRECT = 0;...} What visibility do they have?Write the Boat class in Java Eclipse. A Boat has a registered name, a number of cabins, and a length.a) Define the instance variables (data fields).b) Include 2 constructors (default and one that receives the Boat registeredname, number of cabins and its length as an input).c) Write accessors (getters) and mutators (setters) methods for the instancevariables on your own. Verify/correct the answers with the help of Eclipse.Which is true? Group of answer choices A class can implement multiple interfaces A class can inherit from multiple classes A class can implement only one interface An interface can implement multiple classes