Rishabh Singh’s Post

🚴♀️ Exploring Private and Default Methods in Interfaces in Java! 🚴♂️ Today, I learned something really interesting about interfaces in Java — they’re not just about abstract methods anymore! 💡 Modern Java allows private, default, and static methods inside interfaces, giving developers more flexibility and cleaner design. ✨ Here’s what stood out to me: 🔹 Private methods in interfaces help in code reusability within the interface — they can’t be accessed outside but support other methods internally. 🔹 Default methods allow interfaces to have implementations, so classes that implement them don’t need to override unless necessary. 🔹 This feature promotes modularity, code maintenance, and reduces redundancy in large-scale applications. It’s amazing how Java keeps evolving — bridging the gap between interfaces and abstract classes while still keeping things simple and powerful! 💪 #Java #OOP #Interface #DefaultMethod #PrivateMethod #LearningInPublic #CodeJourney #SoftwareDevelopment #Programming #10000Coders #GurugubelliVijayaKumar

Why does 1 == 1 return true but 128 == 128 return false in Java? 🤔 Last week, I stumbled across this little Java “paradox” again — and it reminded me how deep even the simplest lines of code can go. I broke it down in my latest article — explaining what really happens under the hood with Integer caching and autoboxing. 👉 Check it out here: https://lnkd.in/ef2Zxadr #Java #Programming #Coding #SoftwareEngineering #JavaInternals

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

☕ What I Learned Today While revisiting my Core Java concepts today, I spent some time exploring the Stream API — a feature I’ve often used, but this time I focused on understanding how it actually works and why it’s so useful. - Streams make working with collections much cleaner and more readable. - Instead of writing multiple loops and conditions, you can perform operations like filtering, mapping, or sorting in a single, fluent flow. - It helps write code that focuses more on what needs to be done, rather than how to do it. Using Streams made the logic look cleaner and easier to understand — and that’s the real beauty of it. #Java #StreamAPI #CoreJava #LearningInPublic #Programming #CleanCode #SoftwareDevelopment

Today I started my 30-day Java learning challenge, and I wanted to begin with the foundation of how Java actually runs: JVM, JDK, and JRE. Day 1/30 – JVM, JDK, JRE (What I learned today) [Video Link]- https://lnkd.in/gYpEk8gs 🔹 JDK (Java Development Kit) This is what we install as developers. It includes: javac (compiler) Debugger Tools like jstack, jmap, jar And it also contains the JRE If you want to write Java programs → you need the JDK. 🔸 JRE (Java Runtime Environment) This is needed to run Java applications. It includes: JVM Core Java libraries If you only need to execute Java applications → JRE is enough. 🔵 JVM (Java Virtual Machine) The real hero. This is where Java code actually runs. The JVM: Loads and verifies .class files Interprets bytecode Uses the JIT (Just-In-Time) compiler to optimize frequently used code Manages memory using the Garbage Collector Makes Java platform independent Java compiles to bytecode, not machine code. The JVM converts this bytecode into machine instructions for your OS. Tomorrow (Day 2/30): Why Java is ALWAYS “pass-by-value”, not pass-by-reference — and why this confuses so many developers 😄 #Java #Learning #SoftwareEngineering #JavaDeveloper #Backend #Programming #100DaysOfCode #30DaysChallenge

Ever wondered why developers say — "Don’t extend the Thread class in Java"? In my latest YouTube video, I broke down the real difference between extending Thread and implementing Runnable — and why one is a much smarter choice. 💡 Here’s the gist: ‣ Extending Thread tightly couples your code — less flexibility, less scalability. ‣ Implementing Runnable promotes clean design, reusability, and better separation of logic. ‣Plus, it plays nicely when you need your class to extend something else too. It’s one of those concepts every Java developer thinks they know — until they actually see both approaches side by side. 🎥 Watch the full breakdown here 👉 https://lnkd.in/gNezDbaq #Java #Threads #Multithreading #Programming #Developers #Runnable #SoftwareEngineering

Ever seen this error in Java? 👇 class Student is public, should be declared in a file named Student.java You rename the file and move on… But have you ever wondered — why does Java even care? 🤔 Here’s the simple reason 👇 In Java, the compiler and JVM map each public class directly to its file name. When you compile Student.java, Java expects one and only one public class named Student. If you put multiple public classes in the same file, the compiler gets confused — “Which class does this file actually represent?” That’s why Java says: ✅ You can have multiple classes in one file ❌ But only one can be public, and the file name must match that class It’s not just a random rule — it’s how Java keeps class loading fast, predictable, and organized. Most developers know the rule. Few know the reason. 😉 #Java #Programming #CodingFacts #SoftwareEngineering #Developers #LearnCoding #OOPsConcepts

🌟 Java Insight: @IntrinsicCandidate Annotation Just discovered @IntrinsicCandidate in Java! It’s a special tag in the code that tells the JVM, “This method could be supercharged for speed.” If the JVM agrees, it swaps in a highly optimized version behind the scenes—no extra work needed from us. Think of it like giving the JVM permission to use a power tool instead of a regular one for certain jobs, making things run faster and smoother. You’ll find this in core methods like Math, String, and Array operations—places where speed really matters. It’s internal magic that helps Java stay both easy to use and lightning fast! #Java #Performance #JVM