Muhammad Ghulam Azad Ansari’s Post

🚀 Beats 100.00% of Java submissions! Just solved a LeetCode problem with 0ms runtime — faster than every other Java solution submitted. That's not something you see every day! ✅ The problem: Find the maximum product of two distinct integers in an array. Simple concept, but the key is doing it in a single O(n) pass — no sorting, no extra space. The approach: → Track the two largest numbers as you iterate → Return (first-1) × (second-1) → Done. Clean, fast, efficient. Every once in a while, the stars align and your solution hits that perfect mark. Today was that day. 💯 Keeping the momentum going — one problem at a time. 💪 #LeetCode #Java #DSA #CodingChallenge #100Percent #ProblemSolving #Programming #SoftwareEngineering #CompetitiveProgramming

[Part 2]: writing a multithreaded code in Java and not sure which interface/keyword to use? take this: ✅ use Future to represent the result of an async computation and to block or check completion ✅ use CompletableFuture for non-blocking, composable async chaining tasks ✅ use ScheduledExecutorService for periodic or delayed task execution ✅ use synchronized to ensure mutual exclusion on methods or blocks ✅ use volatile to guarantee visibility of changes across threads #multithreading #softwaredevelopment #coding #java

Understanding Java Class Loading & Memory Areas Today, I learned how Java manages memory during Class Loading. It helped me understand what happens behind the scenes when a program runs.  Simple Example: class Demo { static int x = 10; // Stored in Method/Class Area void show() { int y = 5; // Stored in Stack System.out.println(x + y); } } public class Main { public static void main(String[] args) { Demo obj = new Demo(); // Object stored in Heap obj.show(); } } **When this program runs: 1.Class is loaded into Method Area 2.Static variable (x) is initialized once 3.Object (obj) is created in Heap 4.Method execution happens in Stack #Java #Programming #LearningJourney #SDLC #Coding #Developer #CareerGrowth

Java devs: Optional is not just a null check in a trench coat. Stop doing this: if (optional.isPresent()) { return optional.get(); } Start doing this: optional .map(User::getEmail) .filter(email -> email.endsWith(".com")) .orElse("unknown") Chainable. Readable. No NullPointerException in sight. That's what Optional was built for. #Java #Programming #CleanCode #SoftwareEngineering #BackendDev

🚀 100 Days of Java Tips — Day 17 Tip: Avoid returning "null" from methods ❌ This is one of the most common causes of bugs in Java. Example: Bad: return null; Better: return Collections.emptyList(); ✅ Or: return Optional.empty(); ✅ Why it matters: • Reduces chances of NullPointerException • Makes your code safer • Improves readability for other developers Real problem: If someone forgets to check for null your code will crash in production ⚠️ Best practice: • Return empty collections instead of null • Use Optional for nullable values • Make your methods predictable Good code is not just working code it’s safe and reliable code Do you return null or avoid it? 👇 #Java #JavaTips #Programming #Developers #BackendDevelopment #CleanCode #SoftwareEngineering #BestPractices #Coding #Tech

Most people think they know Java basics… until questions like these show up Try this, 👉 JDK vs JRE vs JVM Who actually runs your code? And what do you really need to install? 👉 Primitive types How many are there? Which one is not even numeric? Be honest — confident or guessing? 😄 I’ll drop more later today. #Java #Coding #Developers

Most Java developers use HashMap. But many don’t know when it becomes dangerous ⚠️ Especially in multithreaded applications. Swipe → to understand why ConcurrentHashMap exists. 💬 Comment “code” for real examples. #Java #Backend #JavaDeveloper #Programming

Hello Everyone👋👋 How does Java achieve platform independence? Java achieves platform independence through the use of the Java Virtual Machine (JVM). Java code is compiled into bytecode, which is then interpreted by the JVM on any platform, allowing the same code to run on different systems. #Java #backend #frontend #FullStack #software #developer #programming #code #class #object #inheritance #lambda #super #constructor #interface #abstract #SpringAI #AI #GenAI #SpringBoot #Nodejs #React #Angular #Java26 #multithreading #Array #interview

🚀 Exploring Multithreading in Java Created a simple program using Thread + Lambda (Runnable) to print numbers with a delay. 🔹 Learned how threads work 🔹 Used lambda expressions for cleaner code 🔹 Implemented Thread.sleep() for controlled execution Small steps every day towards mastering Java and backend development 💻🔥 #Java #Multithreading #CodingJourney #DeveloperLife #LearningByDoing

Day3 - Understanding Java Array List !! 👉 List interface promises that the elements maintain the order in which they are added. That means it is an ordered Collection. List implementations do not sort the elements. 👉 The array elementData is initialised with a default size of 10 👉 Formula for creating a new capacity is ((old size * 3) / 2) + 1 #java #coding