Java Collections Interface vs Class: Key Differences

A quick java tip about primitives In Java, the GC does not clean up primitives. Primitives aren’t stored on the heap; they live on the stack or inline inside objects, so they don’t need garbage collection. GC only collects heap objects like Integer, arrays, and anything created with new. Primitive fields inside an object are just part of that object’s memory and disappear when the object itself is collected. #java #javadeveloper #javaprogramming #programming

💡 Java Logical Program Practice — Remove Duplicates & Find Largest Numbers 💻 Today I practiced a simple yet powerful Java logic: ✅ Removed duplicate elements from an array using the Set interface ✅ Found the largest and second largest numbers using loops Concepts used: Array sorting (Arrays.sort()) Set for duplicate removal Loop logic for max & second max values Output: Before remove duplicate: [1, 2, 2, 3, 5, 6, 7, 8, 9, 12, 13, 14, 14, 15] After remove duplicate: [1, 2, 3, 5, 6, 7, 8, 9, 12, 13, 14, 15] Largest number: 15 Second largest number: 14 🧠 This kind of daily logic practice strengthens core Java understanding and logical thinking! #Java #CoreJava #CodingPractice #JavaDeveloper #ProgrammingLogic #ProblemSolving #SetInterface #Array #DailyLearning #LearningInPublic

Functions, methods, and classes in Java: Function: A block of code that performs a specific task. Method: A function that belongs to a class or object (in Java, all functions are methods). Class: A blueprint that defines attributes (fields) and behaviors (methods) of an object. Here are 3 things that helped me write better Java code 👇 1️⃣ Keep methods short – each method should do one thing well. 2️⃣ Use meaningful names – “calculatePrice()” > “xyz()”. 3️⃣ Encapsulate logic inside classes – group related data and behavior. Clean, modular code is easier to test, reuse, and debug. #Java #CleanCode #OOP #CodingTips #SoftwareEngineering #JavaCommunity #CodeSmarter

📘 Day 62 – Core Java (Thread Creation & Life Cycle) ✅ ✔️ Learned the Thread life cycle and how threads work from creation to termination. ✔️ Learned two ways to create a thread in Java: 1️⃣ By extending the Thread class – override run() and call start() using the object. 2️⃣ By implementing the Runnable interface – implement run(), create a Thread object, and call start(). ✔️ Understood how start() begins a new thread while run() defines the task inside the thread.

Feels Good To Be Back!! Today, I wrote a simple Java program that takes a character input and checks whether it’s a vowel or consonant. It’s a small yet fundamental logic-building exercise that strengthens understanding of conditional statements, character handling, and Scanner input in Java. KEY POINTS ‣User Input Handling: ‣Character Normalization: ‣Conditional Logic: ‣Logical OR Operator: ‣Input Validation Concept (optional to add): ‣Efficient and Simple Design: ‣Resource Management: Here is the code snippet!👇 #Java #LearningToCode #Practice #Buildinpublic #JavaDevelopment

I had this post on my wall today and actually, while really basic, this topic is weirdly interesting. The post mentioned that "a+b is promoted to int" which is not exactly what happens. Actually the operants are converted to "int" before the operation is performed. This is actually the same (and in fact specified) for several languages like Java, C#, C, C++ and for multiple reasons - which are partially decisions made around historic constraints. Newer languages like Rust, Go, Zig, Kotlin, ... don't mirror this and keep the type as specified in the parameters. Back to the example: Java (and also C#) won't do the implicit narrowing to "byte" for strictness and safety reasons, thus the compiler will complain. In C or C++ the implicit narrowing cast is actually done, so the first example compiles just fine "uint8_t c = a + b;". But handling this strictly raises a problem for C# and Java with compount operators. Here the parameters still are promoted to "int" but the specification explicitely states that the behaviour is identical to "E1 = (T)((E1) op (E2))", so a cast is performed. Pretty much solely to support compount operators as syntactic sugar. #Java #CSharp #CPlusPlus #Codingtrivia

Even & Odd Numbers in Java | Step-by-Step Array Program Explained public class EvenOddArray {   public static void main(String[] args) {     int[] numbers = {10, 15, 22, 9, 8};           System.out.println("Even Numbers:");     for (int num : numbers) {       if (num % 2 == 0) {         System.out.print(num + " ");       }     }           System.out.println("\nOdd Numbers:");     for (int num : numbers) {       if (num % 2 != 0) {         System.out.print(num + " ");       }     }   } } #JavaProgram #EvenOddNumbers #JavaTutorial #CodingForBeginners #SoftwaretestingbyKP

Java Interfaces — Default vs Static Methods & Ambiguity Today I explored how Java handles multiple inheritance with interfaces, especially when both interfaces contain the same default method. ✅ Default methods are inherited ✅ Static methods belong to the interface — called using the interface name ⚠️ If two interfaces have the same default method, the implementing class must override it to avoid ambiguity. 🎯 Key Takeaways When two interfaces have the same default method, Java forces us to override & resolve the conflict We can call specific parent interface default methods using InterfaceName.super.method() Static methods in interfaces do not participate in inheritance → call like AAA.clear() 💬 What I learned today Java gives power with multiple interface inheritance, but also ensures clarity by requiring us to resolve ambiguity manually. Special thanks to my mentor Anand Kumar Buddarapu sir #Java #OOP #Interface #Programming #LearningJourney #CodeLife #SoftwareEngineering #JavaDeveloper #MultipleInheritance #TechLearning