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- In Java Use a given class API to create objects and call static and non-static methods of that class.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.TASK Design the Java classes named Shape, Rectangle and Point by taking into account the following UML diagram: Write a Test dass to verify your implementation. Shape -color: String -location : Point +Shape(String) +getX(): double +getY() : double +setLocation(double,double) : void +getColor(): String +setColor(String): void +Print() : void Circle Point +radius: double +setCenter(double,double): void +getCenter () : Point +setColor (String): void +getColor(): String +Print() : void +Circle(double) -x: double -y: double +getX(): double +setX): void +getY() : double +setY() : void +Print() : void Rectangle '+width : double +height : double +getCornerLeftLow() : Point +getCornerleftUpp: Point +getCornerRightLow() : Point +getCornerRightUpp() : Point +setLocation(double, double) : void +setColor(String): void +getColor() : String +getArea() : double +Print() : void +Rectangle(double,double) NOTES: (1) The location of a Rectangle object is defined as its lower left corner and the location…
- JAVA CLASS AND OBJECT JAVA JAVA JAVA Write a java program/code of the given problems below: abstract class Animal { // abstract methods abstract void move(); abstract void eat(); // concrete method void label() { System.out.println("Animal's data:"); } } 1.) Modify the abstraction example code above by adding another class “TestCarabao” with the necessary methods “label, move, and eat”. 2.) Write a program that creates a car object, and displays the year and name with one method “speed”. Example output: Year: 2021 Model: Toyota Speed: 200km/h 3.) Write the main class of the given class Animal below that set the number of legs to “4” and display (get) the number of legs. class Animal { private int numberOfLegs; public void setNumberOfLegs(int numberOfLegs) { this.numberOfLegs = numberOfLegs; } public int getNumberOfLegs() { return numberOfLegs; } }Topic: C# Write the C# program with explaining the proper logic used and screenshot of the output which you got in Visual Studio... Difference between static and Instance class in C# Create some classes which implement the concept of method overloading and overriding. Read on difference between Abstract class and Interfaces and find out the example when to use what? Create classes with example of Abstract class and Interface.Write code in java object oriented programming. You are required to create a simple command line application that allows users to do two basic things, (1) create an email comprising of properties, to, from, subject and message and (2) to create a book chapter that has the properties of chapter title, chapter number and chapter contents. When the program begins its execution, your program should first ask the user for the sender and receiver for the email, its subject and lastly its message; it should then display the entire email in a well-structured format. Second, the program should ask the user for the book chapter name, its number and finally the contents that go in the chapter. At the end, display the book chapter along with all the properties.
- What is polymorphism in Java? It is when a program uses several different types of objects, each with its own variable. It is when a single variable is used with several different types of related objects at different places in a program. It is when a single parent class has many child classes. It is when a class has several methods with the same name but different parameter types.What is a constructor in a Java class?Compulsory Task Answer the following questions: What is an interface in Java and why would you, as a software developer, use interfaces? What is the difference between an abstract class and an interface? Why is abstraction an important concept in software development and what role do interfaces play in abstraction? What must a class do in order to implement an interface? What is an abstract method? Can you instantiate an interface? Can you declare a constructor inside an interface? If not, why? Can we override an interface method with visibility that is not public?
- Describe the advantages of using interfaces over abstract classes.INTRO JAVA Problem 1 Implement a superclass Person. Make two classes, Student and Instructor, that inherits from Person. A person has a name and a year of birth. A student has a major, and an instructor has a salary. Write the class declarations, the constructors, and the methods toString & equals for all classes. Supply a test program for these classes and methods. Problem 2 Make a class Employee with a name and salary. Make a class Manager that inherits from Employee. Add an instance variable, named department, of type String. Make a class Executive inherit from Manager. Implement toString and equals methods for all classes; supply a test program that tests these classes and methods toString() method should print all the properties of the class; as Name and DOB is same for both student and instructor, you can implement it in the superclass "Person" Problem 1 Create 3 students Student1 : Name James, DOB: 01/01/2000, Major: English Student2: Name Jane, DOB:…PROGRAMMING LANGUAGE: JAVA SUBJECT: ADVANCED OOP WITH JAVA QUESTION NO 1: Make an abstract class named A1 with 2 abstract methods, then implement those methods in child class.