This document provides an overview of object-oriented programming concepts including objects, classes, inheritance, polymorphism, abstraction, encapsulation, and interfaces. It defines objects as instances that have state and behavior. Classes are blueprints used to create object instances. Inheritance allows classes to inherit properties from parent classes. Polymorphism enables one task to be performed in different ways. Abstraction hides internal details and shows functionality. Encapsulation binds code and data into a single unit. Interfaces define contracts between classes and achieve abstraction and multiple inheritance in Java. Packages organize related classes and interfaces.
Object-Oriented Programming in Java
Java is a well-liked programming language that may be used to create a wide range of applications, from straightforward desktop programs to intricate web programs. It is an object-oriented programming language that enables programmers to create modular, reusable code, making it simple to maintain and update.
We shall look at the fundamentals of Java object-oriented programming in this tutorial. The fundamentals of object-oriented programming in Java, oops concepts such as classes and objects, inheritance, polymorphism, and encapsulation will all be covered. You will have a solid understanding of object-oriented programming in Java and how to use it to create robust and scalable programs at the end of this article.
Introduction to OOPs concept
Object-oriented programming in Java is a programming paradigm that revolves around objects. An object is a real-world entity that has a set of attributes and behaviors. In Java, even basic data types like integers and booleans are considered objects.
In OOPS, a program is designed by creating objects that interact with each other to perform tasks. Objects have attributes that define their properties and methods that define their behavior.
In Java, we create classes, which are templates that define the attributes and behaviors of objects. A class can be compared to an object creation blueprint. Once a class is defined, objects can be created based on that class.
Principles of Object-Oriented Programming
There are four main principles of object-oriented programming:
a. Abstraction
Abstraction is the process of hiding complex details and providing a simplified interface for the user. It helps developers to create simpler and more understandable models of a complex system, by just exposing only the required features and not the implementation part. In Java, abstraction can be achieved using interfaces and abstract classes.
b. Encapsulation
Encapsulation is the process of hiding the internal details of an object and providing a public interface for accessing and modifying the object. It helps in maintaining the integrity of the object and ensures that its internal state cannot be modified by external code. In Java, encapsulation can be achieved using access modifiers such as public, private, and protected.
Got confused between Abstraction and Encapsulation?
Abstraction is about simplifying the complexity of a system by focusing on its essential features, while encapsulation is about protecting the integrity of an object by hiding its internal details.
c. Inheritance
The process of creating a new class from an existing one is called Inheritance. The new class inherits the attributes and behaviors of the existing class and can add additional attributes and behaviors. This helps in reducing code duplication, promoting code reuse, and making the code more modular and maintainable. In Java, the extend keyword is useful for achieving inheritance.
d. Polymorphism
The ability of an
Object-Oriented Programming in Java
Java is a well-liked programming language that may be used to create a wide range of applications, from straightforward desktop programs to intricate web programs. It is an object-oriented programming language that enables programmers to create modular, reusable code, making it simple to maintain and update.
We shall look at the fundamentals of Java object-oriented programming in this tutorial. The fundamentals of object-oriented programming in Java, oops concepts such as classes and objects, inheritance, polymorphism, and encapsulation will all be covered. You will have a solid understanding of object-oriented programming in Java and how to use it to create robust and scalable programs at the end of this article.
Introduction to OOPs concept
Object-oriented programming in Java is a programming paradigm that revolves around objects. An object is a real-world entity that has a set of attributes and behaviors. In Java, even basic data types like integers and booleans are considered objects.
In OOPS, a program is designed by creating objects that interact with each other to perform tasks. Objects have attributes that define their properties and methods that define their behavior.
In Java, we create classes, which are templates that define the attributes and behaviors of objects. A class can be compared to an object creation blueprint. Once a class is defined, objects can be created based on that class.
Principles of Object-Oriented Programming
There are four main principles of object-oriented programming:
a. Abstraction
Abstraction is the process of hiding complex details and providing a simplified interface for the user. It helps developers to create simpler and more understandable models of a complex system, by just exposing only the required features and not the implementation part. In Java, abstraction can be achieved using interfaces and abstract classes.
b. Encapsulation
Encapsulation is the process of hiding the internal details of an object and providing a public interface for accessing and modifying the object. It helps in maintaining the integrity of the object and ensures that its internal state cannot be modified by external code. In Java, encapsulation can be achieved using access modifiers such as public, private, and protected.
Got confused between Abstraction and Encapsulation?
Abstraction is about simplifying the complexity of a system by focusing on its essential features, while encapsulation is about protecting the integrity of an object by hiding its internal details.
c. Inheritance
The process of creating a new class from an existing one is called Inheritance. The new class inherits the attributes and behaviors of the existing class and can add additional attributes and behaviors. This helps in reducing code duplication, promoting code reuse, and making the code more modular and maintainable. In Java, the extend keyword is useful for achieving inheritance.
d. Polymorphism
The ability of an
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
2. What is OOPs?
Object-Oriented Programming is a
methodology or paradigm to design a program
using classes and objects.
It simplifies the software development and
maintenance by providing some concepts:
Object
Class
Inheritance
Polymorphism
Abstraction
Encapsulation
Message Passing
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3. Object?
Objects are key to understanding object-
oriented technology. Look around right now and you'll
find many examples of real-world objects: your dog,
your desk, your television set, your bicycle.
Real-world objects share two characteristics: They all
have state and behavior.
Identifying the state and behavior for real-world
objects is a great way to begin thinking in terms of
object-oriented programming.
Dogs have state (name, color, breed, hungry) and
behavior (barking, fetching, wagging tail). Bicycles
also have state (current gear, current pedal cadence,
current speed) and behavior (changing gear,
changing pedal cadence, applying brakes).
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4. Object?
Software objects are conceptually similar to real-
world objects: they too consist of state and
related behavior.
An object stores its state in fields (variables in
some programming languages) and exposes its
behavior through methods (functions in some
programming languages).
Methods operate on an object's internal state and
serve as the primary mechanism for object-to-
object communication.
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6. Class?
A class is the blueprint from which individual
objects are created.
It is a logical entity.
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7. Class by Example
In the real world, you'll often find many individual
objects all of the same kind.
There may be thousands of other bicycles in
existence, all of the same make and model.
Each bicycle was built from the same set of
blueprints and therefore contains the same
components.
In object-oriented terms, we say that your bicycle
is an instance of the class of objects known as
bicycles
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8. Class by Example
Syntax
modifier class myClass
{ //class header //field,
constructor //method
declarations
}
public class Dog
{
String breed;
int age; String color;
void barking() { }
void hungry() { }
void sleeping() { }
}
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9. Abstraction
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Hiding internal details and showing functionality is
known as abstraction. For example: phone call, we don't
know the internal processing.
In java, we use abstract class and interface to achieve
abstraction.
Example
Let's take one real life example of a TV, which you can turn
on and off, change the channel, adjust the volume, and
add external components such as speakers, VCRs, and
DVD players, BUT you do not know its internal details, that
is, you do not know how it receives signals over the air or
through a cable, how it translates them, and finally displays
them on the screen.
Thus, we can say a television clearly separates its internal
implementation from its external interface and you can play
with its interfaces like the power button, channel changer,
and volume control without having any knowledge of its
internals.
10. Encapsulation
10
Binding (or wrapping) code and data together
into a single unit is known as encapsulation.
For example: capsule, it is wrapped with different
medicines.
A java class is the example of encapsulation.
Java bean is the fully encapsulated class
because all the data members are private here.
11. Inheritance?
When one object acquires all the properties
and behaviors of parent object i.e. known as
inheritance.
It provides code reusability. It is used to achieve
runtime polymorphism.
Object-oriented programming allows classes
to inherit commonly used state and behavior from
other classes.
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12. Inheritance?
In this example, Bicycle now becomes the superclass of
MountainBike, RoadBike, and TandemBike. In the Java
programming language, each class is allowed to have one
direct superclass, and each superclass has the potential
for an unlimited number of subclasses:
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13. Inheriting Syntax
The syntax for creating a subclass is simple.
At the beginning of your class declaration, use
the extends keyword, followed by the name of the class
to inherit from:
class MountainBike extends Bicycle {
// new fields and methods defining
// a mountain bike would go here
}
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14. Interface?
An interface is a group of related methods with
empty bodies.
Methods form the object's interface with the
outside world; the buttons on the front of your
television set, for example, are the interface
between you and the electrical wiring on the other
side of its plastic casing. You press the "power"
button to turn the television on and off.
Interfaces form a contract between the class and
the outside world, and this contract is enforced at
build time by the compiler.
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15. Interface?
The interface in java is a mechanism to achieve
fully abstraction.
There can be only abstract methods in the java
interface not method body.
It is used to achieve fully abstraction and multiple
inheritance in Java.
Java Interface also represents IS-A
relationship.
It cannot be instantiated just like abstract class.
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16. Package?
A package is a namespace that organizes a set of
related classes and interfaces.
Conceptually you can think of packages as being
similar to different folders on your computer.
The Java platform provides an enormous class
library (a set of packages) suitable for use in your
own applications. This library is known as the
"Application Programming Interface", or "API" for
short.
Its packages represent the tasks most commonly
associated with general-purpose programming.
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17. Polymorphism?
When one task is performed by different
ways i.e. known as polymorphism. For example:
to convince the customer differently, to draw
something e.g. shape or rectangle etc.
In java, we use method overloading and method
overriding to achieve polymorphism.
Another example can be to speak something e.g.
cat speaks meaw, dog barks woof etc.
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