Varun Induvasi’s Post

Java has become more intelligent with the introduction and evolution of Pattern Matching. How has it improved? - No more: - ❌ instanceof + casting - ❌ messy switch statements Now you can write: - Clean - Safe - Readable code From Java 16 to 21, pattern matching has evolved into a powerful feature with: - ✅ instanceof patterns - ✅ switch patterns - ✅ record patterns If you are still using old-style Java, you are missing out on significant advancements. I’ve provided practical examples for better understanding. Check the full guide to enhance your Java skills: https://lnkd.in/dsU2tj8w What’s your favorite feature in Java 21

Day 4 of Java Fundamentals 🚀 Today I revised the Inheritance in Java. Inheritance allows a class to acquire properties and methods of another class. Benefits: ✔ Code reusability ✔ Reduced duplication ✔ Better code structure Example: Dogs inherit behavior like eat() from Animal. 🔹 Multiple Inheritance in Java Java does not support multiple inheritance using classes to avoid complexity (diamond problem). However, it can be achieved using interfaces. 🔹 What is an Interface? An interface is a blueprint that contains abstract methods. A class can implement multiple interfaces, allowing Java to achieve multiple inheritance in a safe way. Example: A class can implement both Printable and Scannable interfaces. Learning Java fundamentals step by step to strengthen my core concepts 💻 #Java #LearningInPublic #SoftwareDevelopment #JavaDeveloper

✨ DAY-39: 🌳 Understanding DRY Principle in Java through Nature While learning Java, I came across the powerful concept of DRY (Don’t Repeat Yourself) — and the best way I visualized it is through a tree. In nature, a tree doesn’t grow multiple trunks for the same purpose. Instead, it has one strong trunk that supports many branches. 💡 Similarly in Java: Avoid writing the same code again and again Create reusable methods or functions Maintain a single source of truth 🌿 Without DRY: Imagine creating multiple trees for every branch → messy, hard to maintain ❌ 🌿 With DRY: One strong tree (method/class) → multiple branches (reuse) ✅ 👨💻 Java Example: Instead of repeating logic: System.out.println("Welcome"); System.out.println("Welcome"); Use DRY: public void printMessage() { System.out.println("Welcome"); } ✨ Call the method whenever needed! 🚀 Key Benefits: ✔ Cleaner code ✔ Easier maintenance ✔ Better readability ✔ Reduced errors 🌱 Write once, reuse everywhere — just like a tree grows efficiently from a single root. #Java #CleanCode #DRYPrinciple #Programming #CodingJourney #SoftwareDevelopment

DAY 30: CORE JAVA 🚀 Understanding "this()" vs "super()" in Java – A Quick Guide! While working with constructors in Java, two important calls often come into play: "this()" and "super()". Though they may seem similar, they serve very different purposes. 🔹 "this()" Call - Used to achieve constructor chaining within the same class. - Helps reuse constructors in a clean and efficient way. - It is optional and depends on the programmer’s need. 🔹 "super()" Call - Used to achieve constructor chaining between parent and child classes. - It is automatically invoked by Java (default behavior). - Always placed on the first line of the child class constructor. ⚠️ Important Rule 👉 "this()" and "super()" cannot be used together in the same constructor, as both must be the first statement. 💡 Key Insight Subclass variables always have higher priority than superclass variables. To access parent class variables when both have the same name, we use "super". 📌 Mastering these concepts is essential for writing clean and efficient code using inheritance in Java. TAP Academy #Java #OOP #Programming #CodingTips #SoftwareDevelopment

In Java versions below 24 virtual threads can pin their carrier platform threads during synchronized blocks or native calls. This prevents the carrier from executing other tasks leading to thread starvation and sub-optimal resource usage. Interesting article on differences between Java 21 and Java 24 in terms how they handle virtual thread pinning. https://lnkd.in/dPpsDYHH

💡 Can a final variable be changed in Java? Most developers would say NO… But using Reflection 👀 — it’s actually possible. ⸻ I tried a small experiment: Changed a private final field from "PENDING" ➝ "COMPLETED" at runtime. Yes… final is not always final. 🔍 How does this work? Using Java Reflection: 👉 setAccessible(true) bypasses Java’s access control 👉 Allowing modification of even private final fields ⸻ ⚠️ Important This is powerful but risky: • Breaks immutability principles • Can lead to unpredictable behavior • Not recommended for production use ⸻ 🧠 Takeaway 👉 final gives compile-time guarantees 👉 But reflection can override them at runtime ⸻ Have you ever used Reflection in real projects? Or faced any tricky bugs because of it? #Java #JavaDeveloper #SpringBoot #BackendDevelopment #Reflection #Programming #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

Avoid bugs in your Java code by learning the difference between == and .equals() for string comparison, and how to do it right.

Avoid bugs in your Java code by learning the difference between == and .equals() for string comparison, and how to do it right.

💻 Understanding Multithreading in Java 🧵⚡ Most beginners watch multithreading… but don’t actually understand how it works internally. So today, I broke it down visually 👇 👉 In Java, multithreading allows multiple tasks to run concurrently within the same process. 👉 All threads share the same memory space, making execution faster and more efficient. 🔍 What’s happening behind the scenes? The main thread starts execution The JVM manages threads & memory Multiple threads run tasks in parallel Once completed → control returns to the main thread ⚡ Why it matters? ✔ Better CPU utilization ✔ Faster execution ✔ Improved application responsiveness 💡 Real-world use cases: Background tasks (file processing, logging) Web servers handling multiple requests Games & real-time systems 🚀 Key takeaway: Don’t just learn syntax — understand how things work under the hood. That’s what separates a coder from a developer. #Java #Multithreading #Concurrency #BackendDevelopment #100DaysOfCode #Learning #SoftwareEngineering