Q4. The classes DateInfo and Student in different packages
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Q: The classes DateInfo and Student in different packages 1. Create two packages, calendar, and…
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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:
Q4. The classes DateInfo and Student in different packages
- Create two packages, calendar, and personal_data
- Create a class called DateInfo inside the package calendar
- The class DateInfo has only three variables, day (type integer), month (integer), year (integer).
- The three variables day, month and year, are invisible outside the class DateInfo.
- Define a constructor for the class DateInfo with three-arguments to initialize the variables day, month and year.
- Write a method called getDateFormat, that returns a date format example; 19/4/2016 (the method returns a String type for simplification)
- Create a class called Person inside the package personal_data.
- The Person class has only two variables, name (type String) and birthDate (type DateInfo).
- Create two Person objects for Omar and Rami, Omar's birthDate is 28/8/1998 and Rami's birthDate is 13/9/1996
Step by step
Solved in 3 steps
- Write a program which controls a metro train and that keeps track of stations and who gets on and off. Design and implement a class called train, which has at least the following: At least the following attributes (you can include others): metroID stationNum which keeps track of the station that the train is at. iii. direction which keeps track of the direction the train is travelling in. passTotal which keeps track of the number of passengers currently on the train. A default constructor which sets the metroID to a random number between 1 and 1000, the station number to 0, the direction (int), and the passTotal to 0 (train is empty). A constructor with one parameter; the parameter is the metro id. The constructor assigns the passed integer to the metroID attribute; the rest of the attributes are set as described in the default constructor. Accessor methods for each attributes. Mutator methods for each attributes. nextStation(int lastStation) which determines the next…I need to write a jave program to keep track of a team sport. Write a class, Team.java, that has the following: * two private instance variables: a String named color and an int named score. * a default constructor with no parameters that initializes color to "Red" and score to zero. * a constructor that takes two parameters (one for each instance variable) and sets the values of the instance variables. * a public getter and setter method for each instance variable. * a toString method that returns the color and score in the following format: "Red Team with 0 points."For the 'The Chicken class' on the app intelliJ in java. The Chicken class must:• Define three fields called exactly name, pricePerKilo and inStock. The name field must be of type String, the pricePerKilo must be of type int (representing the cost per kilo in pence) and the inStock field must be of type boolean.• Initialise the three fields via a constructor that takes exactly two parameters. The first parameter must be of type String and the second parameter must be of type int. The first parameter must initialise the name field and the second must initialise the pricePerKilo field. The constructor must set the inStock field to true for all Chicken objects. There must be no parameter to the constructor for the inStock field.• Define getters for all three fields using the standard getter naming convention. In particular, note that the getter for the inStock field must be called getInStock rather than isInStock.• Define setters for the pricePerKilo and inStock fields using the standard…
- Create a Java Project (with a class and a test class) to represent some real-world entity such as a technology item (TV, Fan etc), an animal, a person, a vehicle, etc. In our class, we have already seen example classes such as Circle, Student, Rectangle, TV etc.The class will:a) Create a total of 5 member variables for the class by selecting the appropriate data types for each field. For example, a class to represent a lamp might include color, price, height, numBulbs, batteryOperated. Each of these 5 variables needs a data type.b) Include at least three different constructor methods, including the default constructor (no argument constructor), so totally three constructors.c) Create a method called showValues( ) to display the values of an object in a formatted manner.The Java test class (with a main method) will:a) Instantiate at least three objects (using each of the constructors at least once) with your program.b) Store the data from the individual objects into an array.c) Utilize…Create a Java Project (with a class and a test class) to represent some real-world entity such as a technology item (TV, Fan etc), an animal, a person, a vehicle, etc. In our class, we have already seen example classes such as Circle, Student, Rectangle, TV etc. The class will: a) Create a total of 5 member variables for the class by selecting the appropriate data types for each field. For example, a class to represent a lamp might include color, price, height, numBulbs, batteryOperated. Each of these 5 variables needs a data type. b) Include at least three different constructor methods, including the default constructor (no argument constructor), so totally three constructors. c) Create a method called showValues( ) to display the values of an object in a formatted manner. The Java test class (with a main method) will: a) Instantiate at least three objects (using each of the constructors at least once) with your program. b) Store the data from the individual objects into an array. c)…1: Based on Program 13-1 in the textbook, create a class name “Circle” with the following declarations by completing missing methods. (Hint: you can use PI=3.14.) //Circle class declaration class Circle { private: double radius; public: void setRadius(double); double getRadius() const; double getArea() const; double getPerimeter() const; };
- The Rectangle class) Following the example of the Circle class in Section 9.2, design a class named Rectangle to represent a rectangle. The class contains: ■ Two double data fields named width and height that specify the width and height of the rectangle. The default values are 1 for both width and height. ■ A no-arg constructor that creates a default rectangle. ■ A constructor that creates a rectangle with the specified width and height. ■ A method named getArea() that returns the area of this rectangle. ■ A method named getPerimeter() that returns the perimeter.Draw the UML diagram for the class and then implement the class. Write a test program that creates two Rectangle objects—one with width 4 and height 40and the other with width 3.5 and height 35.9. Display the width, height, area, and perimeter of each rectangle in this order.Java Question - Using the bottom code, create another class named "DigitalBook" as a subclass of the given "Book" class. Then, Make sure that the "DigitalBook" class contains two constructors: (1) one is the default constructor that takes no parameter, and (2) the other is a parameterized constructor that take 6 parameters. Be sure to use the “super” keyword in the constructors of the "DigitalBook" class. In the “main()” method of the “EX12_1” class, create four instances: “b1”, “b2”, d1”, and “d2”. Let “b1” and “b2” be the instances of the “Book” class, and let the “d1” and “d2” be the instance of the “DigitalBook” class. Be sure to use the specified constructor (as shown in attached picture) to initialize these instances. The Final Output is shown in the attached pictures. Please make sure that no errors show up in the Java Compiler when testing the code. Thank you. Add the following code to the "class Book" code (Below the ___ line). public class EX12_1{public static void…Java Question - Using the bottom code, create another class named "DigitalBook" as a subclass of the given "Book" class. Then, Make sure that the "DigitalBook" class contains two constructors: (1) one is the default constructor that takes no parameter, and (2) the other is a parameterized constructor that take 6 parameters. Be sure to use the “super” keyword in the constructors of the "DigitalBook" class. In the “main()” method of the “EX12_1” class, create four instances: “b1”, “b2”, d1”, and “d2”. Let “b1” and “b2” be the instances of the “Book” class, and let the “d1” and “d2” be the instance of the “DigitalBook” class. Be sure to use the specified constructor (as shown in attached picture) to initialize these instances. The Final Output is shown in the attached pictures. Add the following code to the "class Book" code (Below the ___ line). public class EX12_1{public static void main(String[] args){/////add your code here}}…
- Java ...... Two files are required, a data class named Book and an executable class named TestBook. Class Book has instance data members (all private) String title, String author, int pages, double price. has a public static int variable named numBooks with an initial value of zero. has a parameterized constructor that will be used to make a Book object and assign values to its data members, and increment numBooks. has a no-arg constructor that increments numBooks. has getters and setters for all instance data members. has a toString() method that returns a string displaying the state of a Book instance. Use the numBooks variable to report the number of books instantiated. Class TestBook This class needs a main method and two more methods. In main: create an array capable of holding six Book objects. use the parameterized constructor to specify the data in the first four elements of this array use the no-arg constructor to create the two remaining books in the array.…Create a class Course, which has one field: String courseName Create the constructor, accessor, and mutator for the class. Then, in the main method of this class, create an instance of the class with the name "CST1201". Write an equivalent while statement to replace the following for statement for (int i=2; i<100; i=i+2) { System.out.println(i); }(The Rectangle class) Following the example of the Circle class in Section 8.2,design a class named Rectangle to represent a rectangle. The class contains:■ Two double data fields named width and height that specify the width andheight of the rectangle. The default values are 1 for both width and height.■ A no-arg constructor that creates a default rectangle.■ A constructor that creates a rectangle with the specified width and height.■ A method named getArea() that returns the area of this rectangle.■ A method named getPerimeter() that returns the perimeter.Draw the UML diagram for the class and then implement the class. Write a testprogram that creates two Rectangle objects—one with width 4 and height 40and the other with width 3.5 and height 35.9. Display the width, height, area,and perimeter of each rectangle in this order.