Java EOF Input Reader with Line Numbers

☕ Learn Java with Me — Day 9 Text is everywhere in programming. Today we learned something simple, but extremely powerful. 👉 Strings in Java Strings are used to store text values. For example:String name = "Java"; Simple. But this is where real applications begin. With Strings, we can:→ store names → messages → email IDs → user inputs → passwords We also explored some useful methods:→ length() → toUpperCase() → toLowerCase() → equals() This made Java feel much more practical. Because every real-world application works with text. From numbers → real user interaction 🚀 We’re learning together 🤝 #java #coding #strings #learning #showup

💻 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

🚀 Exploring Java Collection Framework Today’s session was all about understanding the powerful Java Collection Framework and how it helps in managing and organizing data efficiently. Dived deep into core concepts like interfaces and classes in collections, and explored the three main interfaces: List, Set, and Map. Gained clarity on how these structures differ and where to use them in real-world applications. Focused on the ArrayList class—its properties like dynamic resizing, ordered storage, and index-based access—making it one of the most commonly used collection classes in Java. Also understood the hierarchy of ArrayList, how it is part of the List interface, and how it inherits behavior from abstract classes like AbstractList and AbstractCollection. 📚 A strong foundation in collections is essential for writing efficient and scalable Java applications. TAP Academy #Java #CollectionsFramework #ArrayList #Programming #LearningJourney #FullStackDevelopment

🚀 Mastering Java: From Fundamentals to Advanced Frameworks ☕ I’ve put together a comprehensive set of handwritten notes covering the essential pillars of Java Programming. Whether you are a student or a developer brushing up on core concepts, these notes provide a structured look into: ✅ Core Java & OOPs: Deep dives into Inheritance, Polymorphism, and Abstraction. ✅ Data Structures: Mastering the Collections Framework (List, Set, Queue, and Map). ✅ Multithreading & Exception Handling: Building robust and concurrent applications. ✅ GUI Development: A detailed comparison and implementation guide for AWT and Swings. Java’s "Write Once, Run Anywhere" philosophy continues to power the tech world. These notes are designed to simplify complex topics like Constructor Chaining, Bytecode execution, and Dynamic Method Dispatch. #Java #Programming #CodingNotes #SoftwareDevelopment #ObjectOrientedProgramming #JavaCollections #TechLearning #HandwrittenNotes

Multithreading in Java finally clicked for me when I stopped memorizing it… and started visualizing it. 🧠 Here’s the simplest way to understand it: Imagine your application is doing only ONE task at a time. ➡️ Slow ➡️ Blocking ➡️ Poor performance Now introduce multithreading 👇 Multiple tasks run simultaneously: ✔ One thread handles API requests ✔ One processes data ✔ One writes logs Result? Faster and more efficient applications 🚀 But here’s what I learned the hard way: Multithreading is powerful… but dangerous if not handled properly. Common issues I faced: Race conditions Deadlocks Unexpected bugs What helped me: ✔ Proper synchronization ✔ Understanding thread lifecycle ✔ Using ExecutorService instead of manual threads Lesson: Multithreading is not just about speed — it’s about control and correctness. 💬 Have you faced any tricky bugs with multithreading? #Java #Multithreading #BackendDevelopment #SoftwareEngineering #Coding

📒 Day 27: final Keyword in Java 🔥 Java’s way of saying: “Modify me? Compile error loading…” 😎 In Java, the final keyword is used to apply restrictions on variables, methods, and classes to ensure immutability and controlled usage in object-oriented programming. 👉 Uses of final keyword: » 🔹 final variable → value cannot be changed once assigned » 🔹 final method → cannot be overridden in a subclass » 🔹 final class → cannot be extended or inherited 💡 Conclusion: The final keyword helps in achieving security, consistency, and controlled design in Java applications. #Java #CoreJava #OOP #Programming #Coding #LearnInPublic #100DaysOfCode #SoftwareDevelopment #JavaDeveloper #CodingJourney #final #finalkeyword

Today I learned about Abstraction in Java. Abstraction is a core concept of Object-Oriented Programming that focuses on hiding implementation details and showing only essential functionality. To understand it better, I implemented a simple payment system using an abstract class. Through this example, I understood: - How abstract classes work - How implementation is hidden from the user - How different behaviors can be achieved using the same structure I’m continuing to strengthen my understanding of Java and OOP concepts. #Java #Abstraction #OOP #LearningJourney

🚀 Day 57 of My Java DSA Journey Today I worked on a classic Dynamic Programming problem: 💡 Subset Sum Problem 🧠 Approach: • Used recursion with memoization • At each step, decided whether to include or exclude an element • Stored intermediate results to optimize performance 🔍 Key Insight: A subset with sum k exists if: We can form k without current element OR We can form k - arr[i] including current element ⚡ What I learned: • DP pattern similar to Knapsack • Importance of proper memoization • Handling boolean DP states 🔥 Complexity: • Time: O(n × k) • Space: O(n × k) 🎯 Takeaway: Many DP problems are variations of a few core patterns. #Day57 #90DaysOfCoding #DSA #DynamicProgramming #Java

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

Solved "Drawing Book" Problem Using Java 📖💻 | HackerRank Challenge Solved the Drawing Book (Page Count) problem from HackerRank using Java! This problem is a great example of optimization and logical thinking, where instead of simulating page turns, we calculate the minimum turns mathematically. 🔍 Key Concepts Used: Mathematical Optimization Integer Division Problem-Solving Approach 📌 Logic Summary: Count page turns from the front → p / 2 Count page turns from the back → (n / 2) - (p / 2) Return the minimum of both values 💡 This approach ensures O(1) time complexity, making it efficient and clean. Always improving problem-solving skills one challenge at a time 🚀 #Java #HackerRank #CodingChallenge #ProblemSolving #DSA