Nik Malykhin’s Post

🚀 Old Java vs New Java (JDK 25) — Huge Simplification! Java continues to evolve, becoming simpler for beginners and more powerful for advanced systems. Earlier in Java, every program required boilerplate code like: "public static void main(String[] args)" But with JDK 25, Java introduces a simplified entry point: "void main()" This makes Java much easier for: • Beginners learning programming • Quick demos and experiments • Rapid prototyping ✨ Some interesting improvements coming with Java 25: 🔹 Primitive Pattern Matching (JEP 507) 🔹 Module Import Declarations (JEP 511) 🔹 Compact Source Files (JEP 512) 🔹 Flexible Constructor Bodies (JEP 513) 🔹 Structured Concurrency (JEP 505) 🔹 Scoped Values (JEP 506) 🔹 Vector API (JEP 508) 🔹 Key Derivation API (JEP 510) Java is clearly moving toward cleaner, simpler, and more powerful development. Exciting times ahead for Java developers! ☕💻 #Java #Java25 #OpenJDK #Programming #SoftwareEngineering #JavaDeveloper #Coding #TechInnovation #Developers #ComputerScience

New versions of Java are released regularly for several important reasons. The main goal is to keep the language modern, secure, and competitive with other programming languages. 1️⃣ Improve Performance ⚡ Each version introduces optimizations in the JVM, compiler, and garbage collectors to make applications faster and more efficient. Example: Java 17 improved the G1 Garbage Collector Java 21 introduced Virtual Threads for high-performance concurrency. 2️⃣ Add Modern Language Features 🧠 Programming evolves, so Java adds features that make code shorter, clearer, and easier to maintain. Examples: Lambda Expressions in Java 8 Records in Java 16 Sealed Classes in Java 17 Pattern Matching improvements in recent versions 3️⃣ Improve Developer Productivity 👨💻 New versions reduce boilerplate code and simplify development. Example: var in Java 10 allows type inference Text Blocks simplify multiline strings JShell allows interactive coding. 4️⃣ Security Updates 🔒 Older versions may have vulnerabilities. New releases include security patches and safer APIs. 5️⃣ Cloud & Modern Architecture ☁️ Java evolves to support: Microservices Containers (Docker/Kubernetes) Reactive systems High concurrency 6️⃣ Faster Release Cycle Since 2017, Java releases a new version every 6 months. But only some versions are Long-Term Support (LTS): Java 8 Java 11 Java 17 Java 21 Companies usually stay on LTS versions for stability. #Java #JavaDeveloper #SoftwareDevelopment #BackendDevelopment #Programming #Java17 #Java21 #JVM

Kotlin’s 'when' construct used to feel like a “modern” alternative to Java’s switch in the beginning... But since new 'switch' in Java since v17 - not true anymore. On the pattern matching, Kotlin has been behind Scala for over a decade - and now it’s arguably behind Java too ( Java’s pattern matching has turned switch into a real data-oriented branching tool, especially with: - type patterns - record deconstruction patterns - guards (when) Kotlin still shines with exhaustive when over sealed hierarchies. But Java is currently ahead on first-class deconstruction + guards directly in the lang. And honestly, it’s a bit sad for Kotlin. It was positioned as a bold “next-gen JVM language”, backed not only by JetBrains but also a huge community, yet this specific area feels like it is not moving fast enough. Timeline for context: - Pattern matching for switch started as preview (JDK 17 era) and is a standard feature in modern Java releases (see JEP history). - Record patterns are part of Java 21 (JEP 440). #java #kotlin #scala #jvm #patternmatching #softwareengineering

I put together a small repo comparing how different JVM languages handle the same simple task: validating a Person with a few business rules and accumulating all errors at once. Nothing fancy — just the same logic in Java, Kotlin, Scala 3, Clojure, and Jank (https://lnkd.in/e7W7UCDm a new Clojure dialect that compiles natively via LLVM). What surprised me: the "traditional" Java version needed the most complex setup — three libraries and a multi-phase Gradle build — to do what Kotlin/Scala/Clojure express in a few lines out of the box. The JVM has a lot more to offer beyond Java. https://lnkd.in/ejcX-MPb

🚀 Old Java vs New Java (JDK 25) – Huge Simplification! Earlier in Java, every program needed the full boilerplate: No class. No public static void main. Just simple scripting-style Java. This makes Java much easier for beginners, quick demos, and rapid prototyping. ✨ Major Features in Java 25 🔹 Primitive Pattern Matching (JEP 507) Pattern matching now supports primitive types like int. 🔹 Module Import Declarations (JEP 511) Use import module to simplify dependency management. 🔹 Compact Source Files (JEP 512) Run Java without declaring classes. 🔹 Flexible Constructor Bodies (JEP 513) super() is no longer required as the first statement. ⚡ API Improvements 🧵 Scoped Values (JEP 506) Better alternative to ThreadLocal. 🧩 Structured Concurrency (JEP 505) Manage multiple threads as one logical task. 🔒 Stable Value API (JEP 502) Immutable shared values for concurrent programs. 🔐 PEM Crypto Support (JEP 470) Built-in support for certificates and keys. ⚡ Vector API (JEP 508) SIMD operations for high-performance computing. 🔑 Key Derivation API (JEP 510) Standard cryptographic password-based key generation. 💡 Java is evolving fast — becoming simpler for beginners and more powerful for advanced systems. Java 25 LTS is scheduled for September 2025. Java freeCodeCamp w3schools.com JavaScript Mastery #Java #Java25 #OpenJDK #Programming #SoftwareEngineering #Developers #Coding #JavaDeveloper #TechInnovation #ProgrammingLife #LearnToCode #CodeNewbie #ComputerScience #DeveloperCommunity #CodingJourney

🧵 Mastering Thread Lifecycle & State Transitions in Java 🚀 Understanding thread states is crucial for writing efficient, bug-free concurrent applications. Here's a quick breakdown: 6 Thread States in Java: 1️⃣ NEW – Thread created but not started 2️⃣ RUNNABLE – Executing or ready to execute 3️⃣ BLOCKED – Waiting for monitor lock 4️⃣ WAITING – Waiting indefinitely for another thread 5️⃣ TIMED_WAITING – Waiting for a specified time 6️⃣ TERMINATED – Execution completed Key Transitions: • start() → NEW → RUNNABLE • sleep()/wait(timeout) → RUNNABLE → TIMED_WAITING • wait() → RUNNABLE → WAITING • I/O or lock acquisition → RUNNABLE → BLOCKED • notify()/notifyAll() → WAITING → RUNNABLE Q1: What's the difference between BLOCKED and WAITING states? A: BLOCKED occurs when a thread is waiting to acquire a monitor lock. WAITING happens when a thread waits indefinitely for another thread to perform a specific action (like notify() or join()). BLOCKED is lock-specific, WAITING is action-specific. Q2: Can a thread transition directly from WAITING to RUNNABLE without entering BLOCKED? A: Yes! When notify()/notifyAll() is called, the waiting thread moves directly to RUNNABLE state. It only enters BLOCKED if it needs to reacquire a lock that's held by another thread. Q3: How does yield() affect thread state? A: yield() is a hint to the scheduler that current thread is willing to pause its execution. The thread remains in RUNNABLE state and may immediately resume running—no state change occurs. It's just a suggestion, not guaranteed behavior. 💡 Pro Tip: Use jstack or visualvm to monitor thread states in production applications—invaluable for debugging deadlocks and performance issues! What threading challenges have you faced recently? 👇 #Java #Multithreading #Concurrency #Programming #SoftwareEngineering

Deep Dive into Java Strings – Concept Clarity Matters! Today I revised and strengthened my understanding of Java Strings and their internal behavior. Here are the key takeaways: 📌 Immutable Strings Created using literals or new keyword Stored in String Constant Pool (no duplicates allowed) Strings created with new are stored in the Heap Area 📌 String Comparison Methods == → Compares references equals() → Compares values equalsIgnoreCase() → Ignores case compareTo() → Character-by-character comparison Returns 0 → Equal Positive → Greater Negative → Smaller 📌 String Concatenation + operator concat() method Behavior depends on literals vs references (Heap vs SCP) 📌 Important Built-in Methods length(), charAt(), substring(), indexOf(), replace(), toUpperCase(), toLowerCase(), trim(), split() and more. 📌 Mutable Strings StringBuffer StringBuilder Understanding memory allocation and comparison behavior is crucial for writing optimized and bug-free Java code. Consistent practice and concept clarity build strong programming fundamentals. 🚀 TAP Academy #Java #Programming #LearningJourney #CoreJava #Developer #Coding

𝐕𝐢𝐝𝐞𝐨 2 𝐎𝐮𝐭 𝐍𝐨𝐰 — 𝐉𝐃𝐊 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐄𝐱𝐩𝐥𝐚𝐢𝐧𝐞𝐝 (Beginner Friendly) Many beginners install Java… but don’t really understand 👉 What is JDK 👉 What is JRE 👉 What is JVM 👉 How Java actually runs Without this foundation, Java feels confusing later. So I made Video 2 to explain JDK Architecture in the simplest way possible. 🎬 𝐕𝐢𝐝𝐞𝐨 2: JDK Architecture Explained 💡 𝐈𝐧 𝐭𝐡𝐢𝐬 𝐯𝐢𝐝𝐞𝐨 𝐲𝐨𝐮’𝐥𝐥 𝐥𝐞𝐚𝐫𝐧: ✅ What is JDK (JRE + Development Tools) ✅ Role of JRE and JVM in running Java programs ✅ Important JDK tools like javac, jar, javadoc, jdb, jshell ✅ Platform Independence & “Write Once Run Anywhere” ✅ JVM Components   • Class Loader   • Bytecode Verifier   • Execution Engine (Interpreter + JIT)   • Memory Areas (Heap, Stack, Method Area) ✅ Real-life Kitchen Analogy to understand everything clearly This video is made for absolute beginners so you don’t learn Java the wrong way. 📺 Watch Video 👇 2. Java JDK Architecture Explained | JDK vs JRE vs JVM in Tamil | Java Basics | N Verse https://lnkd.in/gYx94ZTh 📌 Course syllabus available on my Telegram channel like before so you can follow step-by-step roadmap. https://lnkd.in/gRGBkF4z 💬 If you want to become a Java developer but have doubts, comment your question. I’ll try to help like I did for juniors in college ❤️ 🔁 Share with someone starting their coding journey. Let’s grow together 🚀 #Java #JavaCourse #LearnJava #SoftwareEngineering #Programming #Developers #JDK #JVM #Coding #NVerse

I built a free Java resource for anyone who wants to learn the language. This is the same repository I used in my Java for Everyone sessions. Everything we covered is here. Code, guides, and exercises. Open source and free for anyone. The curriculum covers 20 structured topics such as: Variables, data types, and operators Conditionals, loops, and methods - Arrays and core OOP - classes - inheritance - polymorphism - abstraction - interfaces - Exception handling, enums, and generics - Collections, lambdas, streams, and Optional - Modern Java features like Records and pattern matching Each topic includes: a markdown guide working code samples practice exercises you can run immediately There are also mini projects like: a number guessing game a contact book with file persistence It is free and open source. Contributions are welcome. GitHub: https://lnkd.in/dcQBpg3z Star the repo if it helps you. It helps more learners discover it. ⭐

Day 13 of Java, Objects Now Come With Instructions 🚀 Today I discovered something interesting in Java… When we create an object, Java doesn’t just create it randomly. It initializes it properly. And that’s where Constructors come in. 👉 Constructor = A special method that runs automatically when an object is created. Example: Student s1 = new Student(); The moment new is used, Java calls the constructor to initialize the object. Then things got more interesting 👀 🔥 Constructor Overloading Same constructor name, but different parameters. Example: Student() Student(String name, int age) More flexibility while creating objects. ⚡ Constructor Chaining One constructor can call another using: this() This helps avoid repeating code. 🧠 this Keyword this refers to the current object of the class. Example: this.name = name; This makes sure we are referring to the object's own variable. Big takeaway today: Constructors make sure every object starts with the right values. That’s when programming starts feeling like designing real systems instead of just writing code. Day 13 and OOP concepts are getting stronger every day 🚀🔥 Special thanks to Aditya Tandon Sir & Rohit Negi Sir 🙌🏻 #Java #CoreJava #OOP #Programming #LearningJourney #Developers #BuildInPublic