Rushikesh Kharat’s Post

Day 6 - Externalization Vs Serialization in Java !! As we know, the Serializable interface in Java allows us to perform serialization, effectively turning an object into a byte stream for storage or transmission. What is externalization ? 💫 Externalization is a customized serialization mechanism. Unlike the Serializable marker interface, it allows developers to explicitly define the logic for saving and restoring an object's data through marshalling and unmarshalling. #java #backend #coding #developer #learning #springboot

Access modifiers in Java confused me more than inheritance at first. Not because they are complex — but because I didn’t understand where they actually matter. This diagram helped me connect the dots 👇 Here’s what finally made sense: • public → no restrictions • private → only inside the class • default → package-level access • protected → the tricky one → works like default → BUT also accessible through inheritance (even outside the package) Access modifiers are not just about visibility — they define how safely and cleanly your code interacts across packages. That’s where Java moves from syntax → design. Grateful to TAP Academy and Harshit T sir for breaking this down clearly Which modifier took you the longest to understand? #Java #OOP #AccessModifiers #SoftwareDevelopment #LearningJourney

💻 Day 19 of My Java Journey Today I explored Generics, and it made Java feel much cleaner. Instead of writing separate code for different data types, generics allow us to write one reusable piece of code. Using <T> as a placeholder, we can handle multiple data types safely without worrying about runtime errors. This is one of those concepts that improves both code quality and flexibility. Learning something new every day 🚀 #Java #Programming #LearningInPublic #CodingJourney

Day 55-What I Learned In a Day (JAVA) Today, I learned how to create and use constructors in Java. 🔹 A constructor is a special method used to initialize an object when it is created. 🔹 Constructors are non-static by default, meaning they work with objects and help assign values to instance variables. 🔹 They are automatically executed when an object is created, making object initialization simple and efficient. 🔹 This reduces the need for setting values manually after object creation. Understanding constructors helped me see how Java initializes objects in a structured and efficient way. #Java #OOP #Constructors #LearningJourney #Programming #TechSkills

Day 49-What I Learned In a Day (JAVA) Today, I focused on understanding the execution flow of static elements in Java. 🔹 Learned about: • Static variables and how they are shared across objects • Static methods and how they can be accessed without object creation • Static initializer (single-line) • Static initializer (multi-line) This helped me clearly understand how Java handles memory and execution at the class level before objects are created. Building strong fundamentals step by step! #Java #Programming #LearningJourney #OOP #TechSkills

Solved Simple Array Sum using LinkedList in Java 8 💻📊 Today I worked on the Simple Array Sum problem and implemented it using LinkedList in Java 8. 💡 What I learned: How to convert a List into a LinkedList Traversing elements efficiently using loops Using Java 8 Streams for cleaner and shorter code ⚙️ Approach: Converted input list into a LinkedList Iterated through elements and calculated sum Also explored stream().mapToInt().sum() for optimized solution 📌 Key Takeaway: Even simple problems help strengthen core concepts like data structures and improve coding efficiency. ⚡ Time Complexity: O(n) ⚡ Space Complexity: O(n) 👨💻 Consistent practice is helping me improve my problem-solving skills step by step. #Java #Java8 #LinkedList #Coding #ProblemSolving

Today I strengthened my understanding of how Java programs actually execute 🚀☕ Here’s what I learned step by step: ✔ The file name must match the public class name 📄 ✔ The main() method can be inside any class, not only the public class 🔍 ✔ Only one public class is allowed in one ".java" file ⚠️ ✔ Protected members outside the package are accessible through inheritance — 🔹 Non-static → accessed using child class object 🔹 Static → accessed using child class name or parent class name inside child class 👨👦✨ ✔ The JVM first loads the class that contains main(), then loads other required classes when needed 🧠 Understanding these core execution rules is helping me build stronger clarity in Java inheritance and access modifiers 💻📚 #Java #Programming #LearningJourney #OOP #JavaDeveloper #BackendDevelopment 🚀

📘 Day 25 – Unlocking the Magic of Java Casting Today I dove deep into non-primitive type casting in Java and had that haha moment! 💡 ✨ Upcasting – Treating a subclass object as a superclass reference. It makes my code cleaner, flexible, and ready for change. ⚡ Downcasting – Converting back safely to a subclass. Done wrong, it throws ClassCastException, but done right, it’s pure power. 🛡 instanceof operator – My safety net! It checks object type before casting, keeping runtime errors away. Seeing objects flow up and down the hierarchy revealed the true beauty of polymorphism, code that’s adaptable, maintainable, and future-proof. 💬 What really clicked: Java isn’t just about syntax; it’s about managing relationships between objects smartly. This makes every line of code safer, cleaner, and smarter. #Java #OOP #Polymorphism #Upcasting #Downcasting #ClassCastException #InstanceOf #DailyLearning #CodeBetter #ProgrammingJourney #DevLife

Starting a 100-day Java series, and this is day 1 ☕ Today, we are covering Java variables - from syntax to scope to memory, all in one place. Declaration, data types, the 3 types of variables, casting, the final keyword and the mistakes most beginners make without realising. 10 slides covering everything. The last slide has a full cheat sheet worth saving.🔖 For more such tech content, follow @herbrewcode on Instagram too. #Java #Day1 #100DaysOfCode #LearnToCode #CodingJourney #HerBrewCode

💻 Day 23 – Strings in Java Today I explored Strings in Java, one of the most fundamental and important concepts. I learned about different types of string handling: 🔹 String – Immutable (cannot be changed) 🔹 StringBuilder – Mutable and faster 🔹 StringBuffer – Mutable and thread-safe Understanding immutability was a key highlight today, as it plays an important role in memory management and performance. 💡 Key takeaway: Choosing the right type of string handling improves both performance and efficiency in Java applications. Continuing to strengthen my core Java concepts step by step 🚀 #Java #Strings #Programming #LearningInPublic #CodingJourney #Day23