ExecutorService vs Parallel Streams in Java

ArrayList Capacity vs Size 📦 ArrayList Size vs Capacity – Not the Same! Many developers think size = capacity. 🔹 Size → Number of elements actually present 🔹 Capacity → Internal array length Example: ArrayList<String> list = new ArrayList<>(10); 👉 Size = 0 👉 Capacity = 10 When size exceeds capacity → resizing happens. ⚠ Frequent resizing = performance cost. #Java #ArrayList #CollectionsFramework #BackendDevelopment #SoftwareEngineering #JavaDeveloper #Programming #TechTips #PerformanceOptimization #day43ofJavaandSpringboot

Removing Elements from ArrayList Removing Elements from ArrayList – Do It Correctly Many developers write: for(String s : list) { list.remove(s); // ❌ Wrong } This throws: 👉 ConcurrentModificationException Because ArrayList iterator is fail-fast. Correct ways: ✔ Use Iterator: Iterator<String> it = list.iterator(); while(it.hasNext()) { it.remove(); } #Java #ArrayList #CollectionsFramework #BackendDevelopment #Programming #JavaDeveloper #CleanCode #SoftwareEngineering #TechGrowth #SpringBoot #day45ofJavaandSpringboot

The Sliding Window Counter algorithm is the robust way to handle traffic spikes without letting bursts overwhelm your API at window boundaries. I created a complete guide on YouTube covering everything you need to know about it. Video highlights: 👉 Clear definition & workflow. 👉 Practical visual examples. 👉 Thread-safe code implementation. Level up your system design knowledge today. Watch here: https://lnkd.in/gTvjpesc #SoftwareArchitecture #Programming #TechSkills #Backend #Algorithms #SystemDesign #RateLimiting #BackendEngineering #LowLevelDesign #Concurrency #Java #InterviewPreparation #ScalableSystems #DistributedSystems #Java #Concurrency #Multithreading #SoftwareEngineering #TechLearning

🚀 How ArrayList Works Internally ArrayList is backed by a dynamic array. When you do: list.add("Java"); 👉 It stores data in an internal array 👉 Default capacity = 10 👉 When full → New array created 👉 Capacity grows by ~50% (old + old/2) ⚡ Random access → O(1) ⚡ Insertion in middle → O(n) #Java #ArrayList #CollectionsFramework #BackendDevelopment #SoftwareEngineering #JavaDeveloper #Programming #Coding #TechCareer #SpringBoot #day41ofJavaandSpringboot

Day 4 | LeetCode Daily Solved LeetCode Problem #152 – Maximum Product Subarray Concept: • Dynamic Programming • Tracking max & min due to negative values Key Learnings: • Negative numbers can flip the result, so tracking min is as important as max • Simple-looking problems can hide tricky edge cases One problem a day — building consistency and stronger fundamentals. #LeetCode #DSA #DynamicProgramming #Java #ProblemSolving

Vavr 1.0 is live I am thrilled to share a breaking news: Vavr 1.0 is officially out now. It is available on mavencentral. Vavr is ,from my point of view, the best library in the Java ecosystem (or at least in the top 1%), it brings functionnal programming to Java. It is a small, complete, robust and efficient library with many features: - a collection of data structures (Either,Option,List,Set...) - a way to model any function (up to 8 parameters while standard Java is limited to functions with arity 1 or 2) - memoization - currying - very powerful pattern matching (quite as good as scala one) - complete documentation... https://vavr.io/ Happy coding #java #functionalprogramming

🚀 Spring Boot Actuator – Explained Simply What is Spring Boot Actuator? Why Actuator is important in production How to enable Actuator Common endpoints like: /actuator/health /actuator/info /actuator/metrics Real-world monitoring use case 💡 This is helpful for: Spring Boot beginners Interview preparation Backend developers Microservices monitoring concepts #SpringBoot #SpringBootActuator #JavaDeveloper #BackendDevelopment #Microservices #Java #SpringFramework #DevLearning #Programming #TechContent #InterviewPreparation

PART 3 of our series: Java 23 — Innovation in Action! Java is evolving at an impressive pace. In this post, I bring you practical, clear examples of the features shaping the future of the language — from Structured Concurrency and Stream Gatherers to the brand-new String Templates. 🧠 Why does this matter? Because mastering these features isn’t just about writing code — it’s about writing safer, more performant, and more elegant code. #Java23 #Java #Programming #Development #Technology #Innovation #Coding #Dev

🚀 Unlock multithreading and synchronization in Java with my new tutorial! Learn threads, sync methods/blocks, inter-thread comms, & examples to avoid race conditions & deadlocks. Boost perf for web apps & more. Perfect for devs leveling up! Read now: https://lnkd.in/gPfSR85n #Java #Multithreading #Synchronization #JavaTutorial #Programming #SoftwareDevelopment #TechTips #Coding #analyticsjobs