In 00, the concept of IS-A is based on: O Class inheritance and Interface implementation Interface implementation None Class inheritance
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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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- Based on the following case study: Write a JAVA code Staff in the Officeo There are various staff positions in an organization.o These staffs have their own offices based on their position.o A higher-ranking position will get a spacious office.o Some low-ranking position might share one office. Determine inheritance classes Determine polymorphism Implement all classes Provide OfficeAppDo the following program in Java Eclipse. Java Class that can be used to create a Fruit object as described below: A fruit has - a: - Date of Harvest -Color -Weight -Number of seeds a. Add all instance variables. b. The class must have getters and setters for all instance variables. c. The class must have two constructors, a no-args and a constructor that receives input for each instance variables. d. The parent class is abstract. e. its 1 abstract method and has toString() method f. its 2 children (concrete) also have toString() methods.Declare an interface IA with two method Me() and You() in JAVA . Define two classes CA and CB which implement IA such that Me in CA displays it is me in CA and You in CA displays how are you from CA. The same message should be displayed from CB. Use the reference variable of the IA to implement runtime polymorphism.
- Implement a JAVA application that keeps track of package deliveries to consumers. Theapplication consists of the following classes:• Item: Create a class called Item. The class has two member variables oftype String named name and description and provides getter and settermethods for both.• Mail (abstract class): Implement an abstract class called Mail . The class hasa member variable of type String named address and a getter method for it.• Letter: Implement a class called Letter that inherits from Mail . The classhas one member variable of type String named contents.• Package: Implement a class called Package that inherits from Mail . Theclass has one member variable of type Item[] named items and a gettermethod for it.• DeliveryTruck: Implement a class called DeliveryTruck with a singlemember variable of type Mail[] of length 10. Add the following method:o void load(Mail mail): This method stores the given mail argumentat the next available spot in the member variable.in java Part 1. Create a Parent ClassCreate a complete Java class that can be used to create a Computer object as described below:A Computer has a:- Manufacturer- Disk Size- Manufacturing Date- Number of coresa) Add all instance variables (data encapsulation is expected).b) The class must have getters and setters for all instance variables.c) The class must have two constructors: a no-arg constructor and a constructor thatreceives input parameters for each instance variable.d) Implement a toString() method for your class.1)Create a complete Java class that can be used to create a Computer object as described below:A Computer has a:- Manufacturer- Disk Size- Manufacturing Date- Number of coresa) Add all instance variables (data encapsulation is expected).b) The class must have getters and setters for all instance variables.c) The class must have two constructors: a no-arg constructor and a constructor thatreceives input parameters for each instance variable.d) Implement a toString() method for your class. 2)Write a Java program TestComputer, which creates three Computer objects with the informationbelow:a) - Manufacturer: Dell- Disk Size: 1189160321024 bytes- Manufacturing Date: April 1, 2020- Number of cores: 2b) - Manufacturer: Apple Inc- Disk Size: 269283712040 bytes- Manufacturing Date: March 31, 2020- Number of cores: 4c) Create your own Object. You can mimic your actual personal computer or use a no-argsconstructor.Print the three objects using toString() method to show all data fields
- (Java) Take a look at the following Person.java code: import java.util.Scanner; import java.io.*; class Person { publicStringname; publicintage; publicStringgender; // add additional member privateAddressaddress; // default constructor publicPerson(){ name="unkonwn"; age=0; gender="NA"; address=newAddress(); } // argument constructor publicPerson(Stringname,intage,Stringgender,Addressaddress){ this.name=name; this.age=age; this.gender=gender; this.address=address; } publicvoidgreeting(){ System.out.println("Hi, my name is " + name + "!"); } publicvoidgreeting(StringotherName){ System.out.println("Hi, " + otherName + "!"); } publicvoidsetName(Stringname){ this.name=name; } publicvoidsetAge(intage){ this.age=age; } publicvoidsetGender(Stringgender){ this.gender=gender; } publicStringgetName(){ returnthis.name; } publicintgetAge(){ returnthis.age; } publicStringgetGender(){ returnthis.gender; } publicAddressgetAddress(){ // fill in method body here returnaddress;…Java Inheritance problem Hi everyone, I've trouble understanding and efficiently finishing this assignment. In this assignment we are required to populate 20*15 scores for 20 students. I can only do it manually, can anyone help to tell me a much better way to solve it?Java Question - Based on code, which answer out of the choices "A, B, C, D, E" is correct. Question has one correct answer. Thank you. Part 2 - 10. Given the following code, which statement is true? class Water() { ... }class Juice() extends Water { ... }class Apple() { ... }class ApplePie() { Apple a1 = new Apple(); }class AppleJuice() { Apple a1 = new Apple(); Water w1 = newWater(); } A. Juice is a superclass and Water is a subclass.B. ApplePie is a superclass of Apple.C. ApplePie is a composite class that contains an instance of Apple class.D. AppleJuice is a superclass that contains an instance of Apple class and an instance of Water.E. Water is a composite class that contains an instance of Juice.5
- Can you please help me code this homework, I'm stuck.Ex.) In Java write an inheritance hierarchy that stores data about sports players as follows: Create a common superclass Player with fields to store the name, number, and team of any player regardless of sport. Provide the appropriate getter and setter methods for each field. Create a subclass BasketballPlayer that will inherit the Player class and also provide the methods jump, dunk, freeThrow, and threePointer . Each method will return a String indicating the player's action (e.g. jumped, dunked). Create an application BasketballGame that will create two objects player1 and player2 of BasketballPlayer with their respective info. Test the methods by executing a "fantasy" game and displaying the details and actions of each player, one action per line (e.g. Lebron James, #23, from Los Angeles Lakers dunked)Hand-write a complete Java class that can be usedto create a Car object as described below.a. A Vehicle has-a:i. Registration numberii. Owner nameiii. Priceiv. Year manufacturedb. Add all instance variablesc. The class must have getters and setters for all instance variablesd. The class must have two constructors, a no-args and a constructor that receivesinput parameters for each instance variable.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…