What is a class? Give an example, create a class
What is a Method? Give an example, create a method
Give an example of a Get Method
Give an example of a method with a return
What is a constructor? Create a constructor . Demonstrate that you understand class, and methods with a clear illustration.
Class:
A class is a blueprint or prototype from which objects are created
Syntax
class <class_name>{ field; method; }
Method:
A method is a block of code which only runs when it is called.
We can pass data, known as parameters, into a method.
Method with void return type means it doesn't return nothing to caller.
Syntax:
static void myMethod() {
// code to be executed
}
Method with return type means it return something to caller with the help of return keyword.
Syntax:
static int myMethod() {
// code to be executed
return 0;
}
Get Method:
The get method returns the variable value also called as Accessor methods
Syntax:
public class Person {
private String name; // private = restricted access
// Getter
public String getName() {
return name;
}
// Setter
public void setName(String newName) {
this.name = newName;
}
}
constructor:
A constructor is a block of codes similar to the method. which is is used to initialize the object.
Rules for creating Java constructor:
syntax:
class Bike1{
//creating a default constructor
Bike1()
{
System.out.println("Bike is created");
}
//main method
public static void main(String args[]){
//calling a default constructor
Bike b=new Bike();
}
}
What is a class? Give an example, create a class What is a Method? Give an...
C# programming
50 pts Question 2:2 1- Create the base class Book that has the following instance variables, constructor, and methods title (String) isbn (String) authors (String) publisher (String) edition ( int) published year (int) Constructor that takes all of the above variables as input parameters. set/get methods ToString method// that return sting representation of Book object. 2-Create the sub class New_Book that is derived from the base class Book and has the following instance variables, constructor, and methods: title...
I need this in java please Create an automobile class that will be used by a dealership as a vehicle inventory program. The following attributes should be present in your automobile class: private string make private string model private string color private int year private int mileage. Your program should have appropriate methods such as: default constructor parameterized constructor add a new vehicle method list vehicle information (return string array) remove a vehicle method update vehicle attributes method. All methods...
Create an Item class, which is the abstract super class of all Items. Item class includes an attribute, description of type String for every item. [for eg. Book] A constructor to initialize its data member of Item class. Override toString() method to return details about the Item class. Create the ExtraCharge interface with the following details. Declare a constant RATE with value 0.25 Declare a method called calculateExtraCharge(), which returns a double value. Create the...
Your text has an example of LinkedList class. Convert the class so that the Link objects have a single long instance variable -- call it "data" -- and the Link instance variable.. Step 2 Then add the following capabilities to the class. A constructor that takes an array of longs as an argument. The contents of the array are use to create Link objects that become objects in the LinkedList. A "search" method that takes a long argument and returns...
Create a Mattress class should have fields for size (king, queen, twin), manufacturer, and price, and a constructor should set default values for each. Write set methods only for size and manufacturer. The set method for size adds $200 for king or $100 for queen. Add a toString() method that returns the data from all of the fields. A child class named AdjustableMattress extends Mattress and adds a field for adjustment type (air or mechanical), with air being the default....
Create a UML diagram to help design the class described in exercise 3 below. Do this exercise before you attempt to code the solution. Think about what instance variables will be required to describe a Baby class object; should they be private or public? Determine what class methods are required; should they be private or public? Write Java code for a Baby class. A Baby has a name of type String and an age of type integer. Supply two constructors:...
Java code for the following inheritance hierarchy figure..
1. Create class Point, with two private
instance variables x and y that represented for the coordinates for
a point.
Provide constructor for initialising two instance variables.
Provide set and get methods
for each instance variable,
Provide toString method to return formatted
string for a point coordinates.
2. Create class Circle, its inheritance from
Point.
Provide a integer private
radius instance variable.
Provide constructor to
initialise the center coordinates and radius for...
Create a class Parent that has a method speaks() which shall display “Parents speaks” . Create another class named Child that has a method sing() which shall display “ children also sing well”. Now, the Child class shall inherit the parent class. Write the Demo class to demonstrate the capabilities of the child class. (that is, create object of the Child class and call both the methods.)
Java Program (PLEASE PROVIDE SCREENSHOT OF THE CODE) Create a class Person which is a super class. The class includes four private String instance variables: first name, last name, social security number, and state. Write a constructor and get methods for each instance variable. Also, add a toString method to print the details of the person. After that create a class Teacher which extends the class, Person. Add a private instance variable to store number of courses. Write a constructor...