How to define and call a simple Java method

Reverse of a number : To reverse a given number in Java, use a loop to extract digits from the number one by one and build the reversed number. Here’s a clear Java program using a while loop, commonly recommended for beginners. import java.util.Scanner; public class ReverseNumber { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("Enter a number to reverse: "); int number = scanner.nextInt(); int reverse = 0; while (number != 0) { int digit = number % 10; // Get last digit reverse = reverse * 10 + digit; // Shift and add number /= 10; // Remove last digit } System.out.println("Reversed Number: " + reverse); } } Explanation: The loop extracts the last digit using number % 10.It multiplies the reversed number by 10 and adds the extracted digit.The original number is divided by 10 in each iteration to remove the last digit. #JavaProgramming #LearnJava #JavaBasics #CodingChallenge #ProgrammingTips #CodeNewbie #DeveloperLife #100DaysOfCode #JavaDeveloper #SoftwareDevelopment #CodingPractice #TechLearning #ProgrammingCommunity

Java Tip for Beginners: Understanding "==" vs ".equals()" One of the most common confusions in Java — and also one of the most important fundamentals — is how strings (and other objects) are compared. Here’s the quick difference 👇 Aspect| Equality ("==") Operator| ".equals()" Method Compares| Checks if two references point to the same memory location.| Compares the content of objects. Working| Works for primitives and object references.| Works for objects only. Customizable| ❌ Cannot be overridden.| ✅ Can be overridden in custom classes. Default Behavior| Compares memory addresses.| Compares references unless overridden. 💡 Pro Tip: Use "==" for primitives and ".equals()" for content comparison (like Strings or custom objects). A big thanks to my mentor Anand Kumar Buddarapu for making these Java concepts crystal clear and guiding me throughout my learning journey! #Java #StringComparison #Codegnan #FullStackLearning #ProgrammingBasics

Day 23 — The Real Power of Java Lies in Its Methods ⚡ Today, I focused on Java methods — and it felt like connecting the missing dots between logic and structure. We often write code that works, but methods make it organized, reusable, and clear. 💡 Here’s what I learned: - A method is simply a block of code designed to perform a specific task. - It helps reduce repetition and improves code readability. - There are two main types: Predefined methods → Already built-in (like Math.max(),System.out.println()) User-defined methods → Created by us to suit our logic 🧠 Important Concepts: - Method Signature → Includes method name + parameter list - Return Type → Tells what the method gives back (or void if nothing) - Parameters & Arguments → Input values that make methods flexible - Static vs Non-static → Static methods belong to the class (can be called directly) Non-static methods need an object to be called Why It Matters: - Breaking logic into methods made me realize how important modularity is. - Instead of writing long, tangled code — each method handles one job clearly and efficiently. 💬 Takeaway: Understanding methods isn’t just about syntax — it’s about writing smarter code that scales. #Java #Day23 #LearningJourney #Coding #MethodsInJava #ProgrammingBasics #SoftwareDevelopment

🎆🔥 Day 48 of My Java Learning Journey 🙌 Strings in Java -> More Than Just Text ☕ Ever wondered why Java Strings are so powerful yet so tricky? A String in Java isn’t just letters it’s a sequence of characters wrapped in a class that gives us superpowers like concatenation, comparison, and manipulation. 💭 Think of a String as a bracelet of characters each bead represents a letter, and once you make the bracelet (String), it’s hard to modify it directly because it’s immutable.  If you want to change it, you create a new bracelet (new String) instead! 🧠 Code Example: String name = "Yash"; String greeting = "Hello " + name; System.out.println(greeting); // Output: Hello Yash To modify repeatedly, use: StringBuilder sb = new StringBuilder("Java"); sb.append(" Rocks!"); System.out.println(sb); // Output: Java Rocks! 📘 Lesson: Strings are immutable that’s what makes Java efficient and secure. Every time you learn something small like this, your backend journey becomes stronger 💪. 🚀 Keep building, keep growing consistency turns learners into professionals! #Java #BackendDevelopment #StringInJava #CodingJourney #LearnInPublic #100DaysOfCode #JavaDeveloper #ProgrammersLife #CodeNewbie #SoftwareDevelopment #TechCareer #LearningNeverStops #Motivation #KeepLearning #CodeSmart #JavaBasics #CareerGrowth #DeveloperJourney #CodingCommunity #Consistency

📢 Core Java Series – Day 4: How Java Program Runs (Step by Step) Ever wondered what happens when you run a Java program? In this short 1-minute video, I’ve explained — 🔹 How Java code is written, compiled, and executed 🔹 The role of Compiler, Bytecode, and JVM 🔹 Why Java is called “Write Once, Run Anywhere” This video is perfect for beginners and students learning Core Java or preparing for interviews. Watch now 🎥 https://lnkd.in/gzaRJhUt Follow Code_Logic_Hub for daily 60-sec shorts on Java, Computer Fundamentals & CS concepts! 🚀 #Java #Learning #Programming #SoftwareDevelopment #ComputerScience #CodeLogicHub #CoreJava

🚀 Learn Java in 5 Minutes: Add Two Numbers! I just built a simple Java program that takes two numbers from the user and calculates their sum. A perfect exercise for beginners to practice variables, input, and output. Why it matters: Learn to use the Scanner class for user input ✅ Understand System.out.println() for prompts and output ✅ Build confidence before tackling bigger projects or coding challenges ✅ Sample Run: Supply a 12 Supply b 34 The sum of 12 and 34 is 46 💡 Tip: Start small. Tiny programs like this help you master the basics before moving to advanced Java concepts. You can expand it to subtraction, multiplication, or division in just a few lines. #Java #CodingForBeginners #Programming #SoftwareDevelopment #IEEEXtreme #LearnByDoing

🚀 String Concatenation: + operator vs. StringBuilder (Java) While the `+` operator can be used for string concatenation in Java, using `StringBuilder` is generally more efficient, especially when performing multiple concatenations. The `+` operator creates a new String object for each concatenation, which can lead to performance overhead. `StringBuilder`, on the other hand, modifies the string in place, avoiding the creation of unnecessary objects. For complex string manipulations, `StringBuilder` provides methods like `append()`, `insert()`, and `delete()`. 💪 Build skills, build wealth, build your future! 📖 Learn at your own pace — 10,000+ concepts, 4,000+ articles, 12,000+ quizzes. AI-guided learning! 🎓 Get started: https://lnkd.in/gefySfsc 🔗 Check it out: https://techielearn.in #Java #JavaDev #OOP #Backend #professional #career #development

🚀 String Immutability (Java) Strings in Java are immutable, meaning that once a String object is created, its value cannot be changed. Any operation that appears to modify a String, such as concatenation or substring, actually creates a new String object. This immutability ensures that String objects can be safely shared and used in multi-threaded environments. Understanding string immutability is crucial for optimizing performance and avoiding unexpected behavior. 💡 Knowledge compounds faster than money — start learning today! 🎯 Learn efficiently — 10k concise concepts + 4k articles + 12k quiz questions. AI-personalized learning! 👇 Links available in the comments! #Java #JavaDev #OOP #Backend #professional #career #development

🧵 Java Multithreading — Immutability: The Simplest Form of Thread Safety After learning about thread safety, I realized something interesting — sometimes, the best way to deal with threads is to make sure they have nothing to fight over. 😄 That’s where immutability comes in. An immutable object is one whose state cannot change after creation. No setters, no internal mutations — just fixed data. If an object never changes, you don’t need synchronized, locks, or volatile. Any thread can read it freely — because it can’t be modified by another. Let’s take an example 👇 String in Java is immutable. When you do: str = str + "World"; you’re not modifying the same string — you’re creating a new one. So multiple threads can share the old string safely. Here’s the key idea: If something can’t change, there’s no race condition to begin with. That’s why classes like String, Integer, and LocalDate are thread-safe by design — immutability is their hidden superpower. ⚡ It’s one of the cleanest ways to write safe, predictable, and bug-free multithreaded code. Drop 👍 & save 📚 for future. If you enjoyed this, follow me for more such content. “Small steps, steady progress — that’s all it takes.” 🌱 #Java #Multithreading #Immutability #ThreadSafety #BackendDevelopment #Coding #SpringBoot #Placement #Interview #Microservices #Learning