Java 25: Simplified Coding with IO.println

🚀🚀🚀Java 25 unlocks more memory for free! Every object in Java includes a metadata header used by the JVM to manage class pointers and identity hash codes. With Java 25’s *compact object headers*, this overhead drops from 12 bytes to 8 bytes—no code changes needed! Smaller objects mean less memory usage, fewer garbage collections, and faster performance. A big win for everyone ! 💪✨ #Java #Java25 #Programming #TechInnovation

🚀 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

💥 “𝘛𝘩𝘪𝘯𝘬 𝘊𝘰𝘭𝘭𝘦𝘤𝘵𝘪𝘰𝘯𝘴.𝘴𝘰𝘳𝘵() 𝘪𝘴 𝘢𝘭𝘭 𝘺𝘰𝘶 𝘯𝘦𝘦𝘥? 𝘞𝘢𝘪𝘵 𝘵𝘪𝘭𝘭 𝘺𝘰𝘶 𝘮𝘦𝘦𝘵 𝘊𝘰𝘮𝘱𝘢𝘳𝘢𝘵𝘰𝘳 𝘢𝘯𝘥 𝘊𝘰𝘮𝘱𝘢𝘳𝘢𝘣𝘭𝘦!” Sorting in Java gets really fun when you start adding your own logic. In my latest video, I’ve explained how to sort not just integers — but your custom objects (like students, names, anything!) — using Comparator, Comparable, and Lambda expressions. 📺 Watch the full breakdown here: https://lnkd.in/gkvb2VxY #Java #Programming #Coding #Comparator #Comparable #LearnJava #SoftwareDevelopment

Deadlock in Java A Deadlock happens when two or more threads are blocked forever — waiting for each other’s resources. This usually occurs when each thread holds a lock and is waiting for another lock to be released. Example scenario: Thread A has Lock1 and waiting for Lock2 Thread B has Lock2 and waiting for Lock1 Both are stuck → this is DEADLOCK ❌ Why it happens? Because of circular dependency between threads. How to prevent it? Always acquire locks in same order Use tryLock() (ReentrantLock) Minimize synchronized blocks Avoid nested locks Conclusion Deadlocks can freeze your entire application. As developers, we must design our locking strategy carefully in multithreading to avoid such situations. #Java #Multithreading #Deadlock #ThreadLifeCycle #JavaDeveloper #LearningJourney #100DaysOfCode #TapAcademy 🚀

Day 63 of #100DaysOfCode – Multithreading in Java 🧵 Today, I explored Multithreading in Java — a powerful concept that allows multiple tasks to run at the same time, improving performance and responsiveness. 🔹 What is Multithreading? Multithreading means executing multiple threads simultaneously within a program. A thread is just a lightweight process that runs independently. 🔹 Why Multithreading? Faster execution Better CPU utilization Useful in games, web servers, chat apps, real-time processing 🔹 Ways to Create Threads in Java 1️⃣ Extending Thread class 2️⃣ Implementing Runnable interface 💡 Takeaway Multithreading makes programs efficient, but must be handled carefully to avoid race conditions and inconsistency. 10000 Coders Gurugubelli Vijaya Kumar #Java #Multithreading #FullStackDeveloper #Learning #CodeJourney #100DaysOfCode

Did you know Java has its own mini garbage collector per thread? Not exactly, but it can feel that way. Each thread in Java has its own memory area (stack and local objects), while the JVM’s garbage collector manages cleanup concurrently across threads. That’s why one background thread may finish quickly, while another keeps the GC busy a little longer. Understanding how Java’s memory and GC threads interact can make you significantly better at debugging performance issues, especially when things behave unpredictably under load. Remember: “ Garbage collection isn’t magic , it’s just smart housekeeping. ” #Java #Programming #SoftwareEngineering #BackendDevelopment #Performance #JVM #MemoryManagement #LearnInPublic #DidYouKnowTech

Day 9 of Java 50 Days of Code Challenge Imagine you’re checking your contact list — name and number — and you want to print them neatly, one by one. That’s exactly what I learned today: how to loop through a Map in Java. Maps store key–value pairs, and there are different ways to read them. Today I practiced using for-each loops to go through keys, values, and entries. Lesson of the Day: > Looping through a Map feels like flipping through your phonebook — one contact at a time. Next, I’ll explore ArrayLists with user input — to make my programs more dynamic and interactive. #Java #50DaysOfCode #Day9 #LearningJourney #CodingStory #MapIteration #JavaCollections Here’s my little example: Guess the output

🚀 Mini Project: Multithreaded File Downloader (Java) Just built a small but powerful console-based downloader to explore Java multithreading and concurrency in real-world use! 💡 What it does: Splits a file into chunks → downloads each in parallel threads → merges into one file ⚙️ 🧵 Concepts used: ExecutorService + Callable for managing threads AtomicLong for progress tracking (thread-safe updates) RandomAccessFile + HTTP Range requests for parallel I/O Live progress bar in the console 💪 Learned: Efficient thread management, synchronization, and I/O operations in Java. Even console-based — it feels like a mini download manager! ⚡ Next up: adding a Swing-based GUI with progress bars and pause/resume options 🎨 #Java #Multithreading #Concurrency #MiniProject #LearningInPublic #JavaDeveloper #DevelopersJourney

🚀 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

As of Java 25, the main method no longer needs to be public or static, and it need not have a parameter of type String[] args Here are the complete rules for main methods 1. If there is more than one main method, static main methods are preferred over instance methods. 2. Methods with a String[] parameter are preferred over those with no parameters. 3. Private main methods are not considered. 4. If main is not static, the class must have a non-private no-argument constructor #Java25 #Java #Programming