Navigating Java Stream API with a Clear Pipeline

Day-4 Spring Without XML. Today I explored how Spring works completely using annotations (no XML). - Started container using AnnotationConfigApplicationContext -Used @Configuration, @ComponentScan, @PropertySource -Created beans with @Component -Injected values using @Value -Managed dependencies using @Autowired ➡️ Final result: Fully initialized object with zero manual wiring. Clean. Simple. Powerful. git - https://lnkd.in/gwbUxRiK Frontlines EduTech (FLM) #SpringFramework #Java #BackendDevelopment #LearningInPublic #100DaysOfCode

🚀 Day 48/180 | #180DaysOfCode 📍 LeetCode | 💻 Java Solved: 1534. Count Good Triplets Used a brute-force triple nested loop to check all possible triplets and validate the given conditions using absolute differences. ⏱️ Time Complexity: O(n³) 📦 Space Complexity: O(1) Strengthening understanding of nested loop patterns and condition-based filtering. 💪 Consistency continues 🚀 #DSA #LeetCode #Java #CodingJourney #Consistency

🚀 Day 58/180 | #180DaysOfCode 📍 LeetCode | 💻 Java Solved: 278. First Bad Version Used binary search on answer space to efficiently find the first bad version while minimizing API calls. ⏱️ Time Complexity: O(log n) 📦 Space Complexity: O(1) Strengthening understanding of binary search optimization and decision-based problems. 💪 Consistency continues 🚀 #DSA #LeetCode #Java #CodingJourney #Consistency

🧠 After learning the Spring Bean Lifecycle, I explored another powerful concept today 👀 Singleton vs Prototype Bean Scope in Spring Boot 🚀 The default scope in Spring is singleton 👇 ✅ Only one object instance is created ✅ Shared across the whole application ✅ Best for services, repositories, controllers Then comes prototype 👇 🔁 A new object is created every time it is requested This makes it useful for: ✅ temporary objects ✅ stateful helpers ✅ per-request custom processing 💡 My takeaway: Bean scope directly changes how Spring manages memory and object reuse. Small annotations can completely change runtime behavior ⚡ #Java #SpringBoot #BeanScope #BackendDevelopment #LearningInPublic

Fixing a Real Spring Boot Error (and what it taught me) While building a simple REST API, I encountered this error:  ClassCastException: Product cannot be cast to Prodcut 🔍 What went wrong? I unknowingly created two different classes: Product ✅ (correct model) Prodcut ❌ (typo) Then I tried to cast one into another — which caused the application to crash. Why this error happens In Java, even a small typo creates a completely new class.So: Product ≠ Prodcut Java treats them as entirely different types, and casting between them is not allowed. #Java #SpringBoot #Debugging #BackendDevelopment #CodingJourney #SoftwareEngineering

🚀 Day 65/180 | #180DaysOfCode 📍 LeetCode | 💻 Java Solved: 2535. Difference Between Element Sum and Digit Sum of an Array Used a single loop + digit extraction approach to calculate both element sum and digit sum efficiently. ⏱️ Time Complexity: O(n × d) 📦 Space Complexity: O(1) Strengthening understanding of number manipulation and digit-based operations. 💪 Consistency continues 🚀 #DSA #LeetCode #Java #CodingJourney #Consistency

I’m starting a series of Oracle-style Java 21 practice booklets covering core concepts like Primitives, Operators, and Flow Control. This is Chapter 1, featuring MCQs and hard-level questions with clear explanations to strengthen fundamentals. More chapters are coming soon. #java #softwareengineer

Day: 95/365 📌 LeetCode POTD: Minimum Distance Between Three Equal Elements II Medium Key takeaways/Learnings from this problem: 1. This one highlights how tracking indices smartly is more important than checking all triplets brute-force. 2. Using previous occurrences helps you narrow down valid triples quickly instead of re-scanning the array. 3. Big takeaway: problems with “equal elements” often reduce to index management + pattern observation. 4. Also a good reminder that optimizing from O(n³) thinking to near O(n) comes down to storing the right info while iterating. #POTD #365DaysOfCode #DSA #Java #ProblemSolving #LearningInPublic #Consistency 🥷

Recently watched a session by Ben Evans (GOTO, available on YouTube) on the State of Java — found it quite insightful. A few points that stood out for me: - The comparison of Java 8 as the “XP of Java” vs Java 17 as the modern LTS baseline - Also touched on the evolving ecosystem — Spring and Quarkus growing together, along with tools like OpenTelemetry, Kafka, and Spark shaping modern Java applications - Continued focus on performance and concurrency improvements, keeping Java relevant at scale - Insights from New Relic data showing Java’s strong and sustained usage in production systems - How Java is still evolving to align with modern workloads, including AI-driven systems Nice reminder that Java isn’t just legacy — it’s steadily adapting to new demands. Thanks to @Benand GOTO for sharing the session. #Java #SoftwareEngineering #Backend #Learning https://lnkd.in/gj9d7UBu