Java Object Serialization and Deserialization

Day 36/100 – Working with ArrayList in Java 📚 Today I practiced using ArrayList in Java, a dynamic array that allows flexible storage and manipulation of data. Unlike normal arrays, ArrayList can grow and shrink dynamically, making it very useful in real-world applications. Key learnings: • Adding elements using add() • Storing multiple values dynamically • Finding size using size() • Easier and more flexible than traditional arrays Understanding collections like ArrayList is important for handling data efficiently in Java. Building strong fundamentals step by step. 🚀 #100DaysOfCode #Java #ArrayList #DataStructures #CodingJourney #LearningInPublic

🚀 Java Concept of the Day: ConcurrentHashMap in Java When multiple threads access a normal HashMap simultaneously, it may cause data inconsistency. To solve this issue, Java provides ConcurrentHashMap. ✅ Thread-safe collection ✅ Better performance than Hashtable ✅ Allows concurrent read/write operations ✅ Used in high-performance backend applications 📌 Example: ConcurrentHashMap<Integer, String> map = new ConcurrentHashMap<>(); map.put(1, "User1"); map.put(2, "User2"); System.out.println(map.get(1)); 💡 Real-time Use Case: Used for caching, session management, shared data in multi-threaded applications. 💬 Interview Question: Difference between HashMap, Hashtable, and ConcurrentHashMap? #Java #JavaDeveloper #Multithreading #BackendDevelopment #Programming #Coding

Just dropped a new video on Comparator Interface in Java — covering custom sorting logic using multiple approaches (class, anonymous class and lambda). A clean, visual explanation to make sorting truly click. #Java #Comparator #Coding #LearningEveryday Watch here: https://lnkd.in/geW_UKh9

🧬 Java Collections – ArrayList Deep Dive Yesterday I explored ArrayList in more detail. ✔️ Looping through elements ✔️ Using methods like remove(), contains(), and size() Understanding these operations helps in managing dynamic data effectively in Java. Also practiced DSA problems like: • Removing even numbers from a list • Finding common elements between two lists Strengthening both collection usage and problem-solving together. 🚀 #Java #Collections #DSA #LearningInPublic #BackendDevelopment #DeveloperJourney

Abstraction means hiding implementation details and showing only essential features. It focuses on what to do, not how to do. Achieved using abstract classes and interfaces in Java. #Java #OOP #Abstraction

🚀 Reading Text Files with `FileReader` and `BufferedReader` (Java) `FileReader` and `BufferedReader` are used for reading character-based data from text files in Java. `FileReader` provides a basic way to read characters, while `BufferedReader` adds buffering for improved performance. Buffering reduces the number of disk access operations, leading to faster reading. It is a good practice to wrap a `FileReader` inside a `BufferedReader` for efficient text file reading. Always remember to close the reader after use to release system resources. #Java #JavaDev #OOP #Backend #professional #career #development

I am excited to share one of the fundamental Java concepts — Difference between Array and ArrayList💡 *Difference between Array vs ArrayList in Java Understanding the difference between Array and ArrayList is important for every Java developer 🔹 Array: * Fixed size (once created, cannot be changed) * Can store primitive data types (int, char, etc.) * Faster performance * Less flexible 🔹 ArrayList: * Dynamic size (can grow/shrink) * Stores only objects (not primitive directly) * More flexible and easy to use * Part of Java Collection Framework * Conclusion: Use Array when size is fixed and performance is critical. Use ArrayList when flexibility and dynamic resizing are needed. #Java #Programming #Learning #Coding #Developer

🚀 Java Tip: Prefer Enhanced For Loop for Better Readability When working with arrays or collections in Java, using an enhanced for loop (for-each loop) can make your code cleaner and easier to understand compared to traditional loops. Instead of managing indexes manually, you can directly iterate over elements. Less clutter, fewer mistakes, better readability. 💡 Why use an enhanced for loop? ✔ No index management ✔ Cleaner and more readable code ✔ Reduces chances of off-by-one errors ✔ Perfect for simple iterations 🔍 Pro Tip: Use enhanced loops when you don’t need the index. If you need position-based logic, then a traditional loop still makes sense. Good code isn’t just about making it work; it’s about making it easy to read, maintain, and scale. #Java #AutomationTesting #CleanCode #SDET #SoftwareEngineering

Day 8 of Java Fundamentals 🚀 Today I started learning the Java Collections Framework, which is widely used in real-world applications. 🔹 List → Ordered, allows duplicates 🔹 Set → No duplicates 🔹 Map → Stores key-value pairs Understanding collections is essential for handling data efficiently in Java applications. Excited to dive deeper into this topic 💻 #Java #LearningInPublic #JavaDeveloper #Collections

🚀 Introduction to Executor Framework in Java Managing threads manually can become complex and error-prone in real-world applications. That’s where the Executor Framework comes in. The Executor Framework, introduced in java.util.concurrent, helps manage and control thread execution efficiently using thread pools instead of creating threads manually every time. 🔹 Why use it? Reuses existing threads Improves performance Simplifies concurrency management Makes applications more scalable 🔹 Common Executors FixedThreadPool – fixed number of threads CachedThreadPool – creates threads as needed SingleThreadExecutor – one thread for sequential tasks ScheduledThreadPool – for delayed and periodic tasks 🔹 Key Benefit You submit tasks, and the framework decides how to run them efficiently. 🔹 Interview One-Liner “Executor Framework abstracts thread creation and lifecycle management, making concurrent programming more manageable and production-friendly.” #Java #ExecutorFramework #Multithreading #Concurrency #JavaDeveloper #InterviewPrep #BackendDevelopment