Harshit .’s Post

🚀 Did you guys know that Java has a feature called Sealed Classes? If you haven’t heard of it yet, you’re not alone—it’s relatively new (introduced in Java 17) and super useful for controlling class hierarchies. What’s a Sealed Class? A sealed class lets you restrict which classes can extend it. Only the classes you explicitly permit can inherit from it. This makes your code safer, predictable, and easier to maintain. Important: The permitted subclasses must be declared as final, sealed, or non-sealed. This ensures the hierarchy is properly controlled. Why it’s cool: - Enforces a controlled hierarchy - Helps with maintainable and safe code design - Works great with switch expressions, because the compiler knows all possible subclasses Sealed classes are a great way to write safer and cleaner Java code—worth exploring if you’re on Java 17 or above! 🚀 #Java #Java17 #SealedClasses #ProgrammingTips #CleanCode #SoftwareDevelopment #OOP #JavaDeveloper

𝙍𝙚𝙢𝙚𝙢𝙗𝙚𝙧 𝙞𝙣 𝙥𝙧𝙞𝙢𝙖𝙧𝙮 𝙨𝙘𝙝𝙤𝙤𝙡 𝙬𝙝𝙚𝙣 𝙩𝙝𝙚 𝙩𝙚𝙖𝙘𝙝𝙚𝙧 𝙖𝙨𝙠𝙚𝙙, "𝙒𝙝𝙖𝙩 𝙞𝙨 2 – 3?" It felt impossible. I got that exact same feeling when I first learned about Java Reflection. We were all taught the same sacred rule: encapsulation. private means private. ...Well, almost. Java 𝗥𝗲𝗳𝗹𝗲𝗰𝘁𝗶𝗼𝗻 is the VIP pass to the JVM's backstage. It's a powerful API that lets you inspect and manipulate classes, fields, and methods at runtime. 𝗬𝗲𝘀, 𝗲𝘃𝗲𝗻 𝗽𝗿𝗶𝘃𝗮𝘁𝗲 𝗳𝗶𝗲𝗹𝗱𝘀. One single line of code 𝗳𝗶𝗲𝗹𝗱.𝘀𝗲𝘁𝗔𝗰𝗰𝗲𝘀𝘀𝗶𝗯𝗹𝗲(𝘁𝗿𝘂𝗲) and the encapsulation barrier is 𝗴𝗼𝗻𝗲. This isn't a gadget for everyday code. This is the "magic" that runs our most critical tools: 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: How does Spring manage to inject your @Autowired dependencies? Through 𝗥𝗲𝗳𝗹𝗲𝗰𝘁𝗶𝗼𝗻. 𝗝𝗣𝗔/𝗛𝗶𝗯𝗲𝗿𝗻𝗮𝘁𝗲: How does data from the database end up in your private fields? 𝗥𝗲𝗳𝗹𝗲𝗰𝘁𝗶𝗼𝗻. 𝗦𝗲𝗿𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻: How do Jackson & Gson turn a JSON string into a Java object? You guessed it... 𝗥𝗲𝗳𝗹𝗲𝗰𝘁𝗶𝗼𝗻. It's slower, it can open up security holes, and it breaks the very encapsulation we work so hard to respect. But you can't truly understand the modern Java ecosystem without understanding this powerful mechanism at the heart of it all. #Java #JavaDevelopment #SoftwareEngineering #SpringBoot #Programming #Tech #OOP #Reflection

🚀 Wrapping up my mini-series on Java Sealed Classes! Over the last two days, I explored what sealed classes are and how the permits keyword helps control inheritance. Today, let’s put everything together with one complete example — showing how sealed, final, and non-sealed subclasses can work in harmony. 💡 Here’s why I find sealed classes so valuable: - They bring clarity to your codebase — you instantly know all possible subclasses. - They add a layer of security and control, preventing unwanted inheritance. - They make your design cleaner and more maintainable in the long run. - And they work beautifully with pattern matching and switch expressions since the compiler knows every subclass. In short, sealed classes give Java developers the right balance between structure and flexibility — a small feature that makes a big impact on code quality. #Java #Java17 #SealedClasses #CleanCode #ProgrammingTips #OOP #CodeDesign #SoftwareDevelopment #JavaDeveloper

🚀 Just published my Java AST Parser Package! 🚀 I'm excited to share my latest open-source contribution - a powerful Java Abstract Syntax Tree (AST) parser that makes it easier to analyze and process Java source code programmatically. 📦 npm Package and Docs : (npm i java-ast-parser) 👇 https://lnkd.in/g-q6tG-z 📦 Check it out on GitHub: 👇 https://lnkd.in/gmxAGJvB Note:- I'd love your feedback and contributions! If you find this useful, please consider: ⭐ Starring the repo 🔍 Opening issues for bugs/feature requests 💡 Submitting PRs for improvements #Java #AST #OpenSource #Programming #DeveloperTools #CodeAnalysis #JavaDevelopment #GitHub

Skimmed this handy roundup of Java 25—and it’s a strong LTS jump for everyday coding. Record patterns, sequenced collections, and (preview) string templates clean up routine code, while module import declarations + compact source files cut boilerplate; on the runtime side, structured concurrency, scoped values, and new JFR profiling round out the upgrade. If you’re still on 21 LTS, which feature would tip you to 25 first? #womenwhocode #softwaredeveloper #softwareengineer https://lnkd.in/ep_8qpP3

Excited to share my latest mini-project: a Temperature Converter built in Java! 🌡️ It converts between Celsius and Fahrenheit using a clean ternary operator approach. Great practice for mastering conditional logic and variable handling. #Java #CodingProjects #LearnByBuilding #SoftwareDevelopment GitHub repo:https://lnkd.in/ewB8XUJn

In Java, what’s your preferred style when building a collection from another source — a classic loop with explicit put, or a more functional, stream-based approach? I often go back and forth. Streams are concise and expressive, but the old-school loop is sometimes more readable and straightforward for future maintainers. Curious what the community leans toward in real-world codebases.

In Java 25, you don’t even need to write the class name, public static void main(String[] args), or System.out.println() anymore 😲 Just type: void main() { IO.println("Java 25 Version The Game Changer"); } …and it runs perfectly! 🚀 Java 25 is truly “The Game Changer.” 🔥 #Java #Java25 #Coding #Programming #Developer #JDK25 #Innovation #JavaUpdates

⁉️Say goodbye to boilerplate code! If you're still writing bulky anonymous inner classes in Java, it's time to level up. The introduction of Functional Interfaces and Lambda Expressions in Java 8 was a game-changer. Q. Why do they matter? 1. Cleaner, more readable code: Write concise and expressive code by representing an interface with a single abstract method. 2. Enables functional programming: Pass behavior as arguments, unlocking powerful features like the Stream API. 3. Reduces overhead: More lightweight than traditional inner classes, leading to better performance and smaller application footprints. Consider the classic Runnable example: java // Old way Thread t = new Thread(new Runnable() { public void run() { System.out.println("Classic Java"); } }); // Modern way with a lambda Thread t = new Thread(() -> System.out.println("Modern Java")); Use code with caution. This change isn't just cosmetic—it unlocks a more powerful and modern approach to Java development. 🫠What's your favorite use-case for lambdas or the Stream API? Share your thoughts below! #Java #Java8 #Programming #CleanCode #DeveloperTips #SoftwareDevelopment

🚀 Day 8 of My 90 Days Coding Challenge 🚀 Today, I explored one of the most fundamental topics in Java — Java Architecture! Here’s what I learned: 🔹 JDK, JRE, JVM, and JIT — their roles and how they work together to run Java programs. 🔹 How a Java file is compiled and interpreted to make execution smooth and efficient. 🔹 Why Java is preferred over C, especially for platform independence and portability. 🔹 The reason Java uses both compiler and interpreter, and how this combination ensures better performance and flexibility. 🔹 What makes Java platform-independent — the power of bytecode and the JVM that runs it anywhere! Every concept I study makes me realize how beautifully Java is designed to balance performance, security, and flexibility. #Day8 #Java #CodingChallenge #100DaysOfCode #JavaLearning #DeveloperJourney #TechGrowth