Object Oriented Programming in Java - Java OOPs Concepts - Learn Object-Oriented Java @ProgrammingKnowledge

ProgrammingKnowledge | Object Oriented Programming in Java - Java OOPs Concepts - Learn Object-Oriented Java @ProgrammingKnowledge | Uploaded March 2024 | Updated October 2024, 5 days ago.
Object-Oriented Programming in Java - Java OOPs Concepts - Learn Object-Oriented Java

Welcome to our comprehensive tutorial on Object-Oriented Programming (OOP) in Java! In this tutorial series, we'll cover essential Java OOPs Concepts, providing you with a solid foundation for mastering Object-Oriented Java development. Let's dive into the topics we'll be covering:

**1. OOPs Introduction:**
- Understand the fundamental principles and advantages of Object-Oriented Programming.
- Explore key OOP concepts such as classes, objects, encapsulation, inheritance, and polymorphism.

**2. Classes and Objects in Java:**
- Learn how to define classes and create objects in Java.
- Understand the structure and components of a Java class.

**3. Methods In Java:**
- Explore the concept of methods in Java and learn how to define and invoke methods.

**4. Constructors in Java:**
- Understand constructors in Java and their role in object initialization.
- Learn about default constructors, parameterized constructors, and constructor overloading.

**5. Static Keyword in Java:**
- Explore the static keyword in Java and its usage in fields, methods, and blocks.

**6. Inheritance in Java Part 1:**
- Understand the concept of inheritance and its implementation in Java.
- Learn how to create subclass and superclass relationships.

**7. Types of Inheritance in Java Part 2:**
- Explore different types of inheritance in Java, including single inheritance, multiple inheritance, hierarchical inheritance, and hybrid inheritance.

**8. Aggregation in Java:**
- Learn about aggregation in Java and how it allows one class to own objects of another class.

**9. Method Overloading in Java:**
- Understand method overloading in Java and how it enables the creation of multiple methods with the same name but different parameters.

**10. Method Overriding in Java:**
- Explore method overriding in Java and learn how subclass methods can override superclass methods.

**11. Super Keyword in Java:**
- Learn about the super keyword in Java and its usage to access superclass members.

**12. Final Keyword in Java:**
- Understand the final keyword in Java and its implications for classes, methods, and variables.

**13. Abstract class in Java:**
- Explore abstract classes in Java and understand how they provide a blueprint for other classes.

**14. Interfaces in Java:**
- Learn about interfaces in Java and how they define a contract for classes to implement.

**15. Packages in Java:**
- Understand packages in Java and how they help organize and manage classes.

**16. Access Modifiers in Java:**
- Explore access modifiers in Java (public, private, protected, default) and their impact on class members.

**17. Exercise on Java OOPS 1 & 2:**
- Test your understanding of Java OOPs concepts with hands-on exercises.

By following along with this tutorial series, you'll gain a comprehensive understanding of Object-Oriented Programming in Java, allowing you to design and implement robust and scalable Java applications. Whether you're a beginner or an experienced Java developer, mastering Java OOPs Concepts is essential for building professional-grade software solutions.

Stay tuned for each installment of this series as we delve deeper into the world of Object-Oriented Java programming!

#Java #ObjectOrientedProgramming #OOP #JavaOOPsConcepts #JavaProgramming #ProgrammingTutorial #SoftwareDevelopment #JavaDevelopment #ObjectOrientedJava #Inheritance #Polymorphism #Encapsulation #Abstraction #JavaClassesAndObjects #TechTutorial #ProgrammingConcepts #JavaTutorial #JavaLearning #TechSkills #JavaExercises #JavaHandsOn #JavaBasics #ObjectOrientedDesign #JavaProgrammingTutorial

How to Install Visual Studio Code on Mac | Install VSCode on macOS (2024)

Kotlin Environment setup for Command Line | Kotlin Environment setup in Windows

How To Read and Write to files with Python | Python File Operations📝👩‍💻

$How to Add GitHub OAuth2 Login in Node.js | GitHub OAuth2 Authentication with Passport.js (2024) **Title: How to Add GitHub OAuth2 Login in Node.js | GitHub OAuth2 Authentication with Passport.js** https://github.com/harshita795/github-auth-app In this tutorial, learn how to set up GitHub OAuth2 login in your Node.js application using Passport.js. GitHub authentication is a powerful way to allow users to log in using their GitHub accounts, enhancing security and user experience. We’ll go step-by-step through setting up OAuth2 in GitHub, configuring Passport.js in Node.js, and implementing login functionality. By the end of this video, you’ll have a fully functional GitHub OAuth2 login integrated into your Node.js app! ### Prerequisites: - Basic knowledge of Node.js and Express.js - GitHub account to create OAuth app - Passport.js installed in your project ### Steps to Implement GitHub OAuth2 Authentication in Node.js: #### 1. **Set Up GitHub OAuth App**: - Go to [GitHub Developer Settings](https://github.com/settings/developers). - Click **New OAuth App**. - Fill in the details: - **Application name**: Give a name to your app. - **Homepage URL**: Enter the URL where your app is hosted (localhost for local development). - **Authorization callback URL**: `http://localhost:3000/auth/github/callback` (or change the port if your app uses a different one). - Click **Register Application** and take note of your **Client ID** and **Client Secret**. #### 2. **Install Required Packages**: - Open your project in the terminal and install Passport and GitHub strategy: ```bash npm install passport passport-github2 express-session dotenv ``` #### 3. **Configure Passport.js with GitHub Strategy**: - In your main server file (e.g., `app.js` or `server.js`), require and configure Passport: ```javascript const passport = require(passport); const GitHubStrategy = require(passport-github2).Strategy; const session = require(express-session); require(dotenv).config(); app.use(session({ secret: your_secret_key, resave: false, saveUninitialized: true, })); app.use(passport.initialize()); app.use(passport.session()); ``` - Set up Passport’s GitHub strategy: ```javascript passport.use(new GitHubStrategy({ clientID: process.env.GITHUB_CLIENT_ID, clientSecret: process.env.GITHUB_CLIENT_SECRET, callbackURL: http://localhost:3000/auth/github/callback }, (accessToken, refreshToken, profile, done) = { // Here you would find or create a user in your database return done(null, profile); } )); passport.serializeUser((user, done) = done(null, user)); passport.deserializeUser((obj, done) = done(null, obj)); ``` #### 4. **Set Up Routes**: - Define routes for authentication: ```javascript // Redirect to GitHub for authentication app.get(/auth/github, passport.authenticate(github, { scope: [user:email] })); // GitHub callback URL app.get(/auth/github/callback, passport.authenticate(github, { failureRedirect: / }), (req, res) = { res.redirect(/profile); // Redirect to profile page after login }); // Route to log out app.get(/logout, (req, res) = { req.logout(); res.redirect(/); }); ``` #### 5. **Create Profile and Logout Pages**: - Set up a profile route to show user information: ```javascript app.get(/profile, (req, res) = { if (!req.isAuthenticated()) return res.redirect(/); res.send(`Hello, ${req.user.username}!`); }); ``` #### 6. **Set Environment Variables**: - In a `.env` file, store your GitHub Client ID and Client Secret: ```plaintext GITHUB_CLIENT_ID=your_client_id GITHUB_CLIENT_SECRET=your_client_secret ``` #### 7. **Test GitHub Login**: - Start your Node.js server and go to `http://localhost:3000/auth/github`. - You’ll be redirected to GitHub to authorize access, and then back to your app’s profile page once authentication is successful. ### Summary: After setting up these steps, you’ll have GitHub OAuth2 login functionality integrated with Passport.js in your Node.js app. You can now allow users to log in with their GitHub credentials securely! ### Troubleshooting Tips: - **Invalid Callback URL**: Make sure the callback URL in GitHub OAuth App settings matches the callback URL in your code. - **Environment Variables Not Loading**: Verify your `.env` file and make sure you’re using `require(dotenv).config()` at the top of your main file. **Helpful Resources**: - GitHub OAuth Documentation: [GitHub OAuth](https://docs.github.com/en/developers/apps) - Passport.js Documentation: [Passport.js](http://www.passportjs.org/) #GitHubOAuth #NodeJS #PassportJS #Authentication #GitHubLogin #WebDevelopment #OAuth2 #NodeJSTutorial #JavaScript$

How to Setup a TypeScript + Node.js Project

How a Return a Value from Function in JavaScript (With Examples) | JavaScript Tutorial

How to Add Authorization in Postman | How to Send API Key in Header in Postman

Fizzbuzz in Javascript - Solutions and explanation (With Examples) | JavaScript Tutorial

Install Wine on Ubuntu 22.04 LTS Linux | Running Windows Programs on Linux

How to Install IntelliJ IDEA on Mac | Install IntelliJ IDEA IDE on macOS (2024)

How To Install MySQL on Ubuntu 22.04 LTS (Linux)