Muhammad Ghulam Azad Ansari’s Post

Java mistake that silently kills performance in prod: Using == to compare Strings instead of .equals() == checks reference identity. .equals() checks actual content. "hello" == "hello" can be true in dev (string pool). It will quietly be false at runtime with real data. Seen it take down an auth flow. Not once. Twice. #Java #Programming #SoftwareEngineering #CodingMistakes #BackendDev

@ControllerAdvice is a Spring Boot annotation used  for global exception handling across the entire  application. Instead of writing error-handling logic inside  every controller, it centralizes the logic in  one place.. . . . . . . . . . #Java #JavaProgramming #JavaDeveloper #JavaCode #JavaScript #JavaCommunity #JavaTutorial #JavaLearning #JavaDevelopment #JavaLife #JavaLovers #JavaProjects #JavaCoding #JavaTips #JavaFramework #Java8 #JavaEE #JavaForBeginners #JavaGeek #JavaWorld #hackforge

@ControllerAdvice is a Spring Boot annotation used  for global exception handling across the entire  application. Instead of writing error-handling logic inside  every controller, it centralizes the logic in  one place.. . . . . . . . . . #Java #JavaProgramming #JavaDeveloper #JavaCode #JavaScript #JavaCommunity #JavaTutorial #JavaLearning #JavaDevelopment #JavaLife #JavaLovers #JavaProjects #JavaCoding #JavaTips #JavaFramework #Java8 #JavaEE #JavaForBeginners #JavaGeek #JavaWorld #hackforge

⚠️ Deadlocks in Java — Small mistake, big problem. Deadlock occurs when two threads wait on each other forever. Thread 1 → holds Lock A, waiting for Lock B Thread 2 → holds Lock B, waiting for Lock A And the application just… freezes. 💡 How to avoid it: → Always follow a consistent lock order → Avoid unnecessary nested locks → Use tryLock() with timeout → Prefer high-level concurrency APIs Multithreading is not just about performance — it’s about writing safe and predictable code. #Java #Multithreading #Deadlock #Concurrency #BackendDevelopment

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

🚨 Java Virtual Threads are NOT a free scalability upgrade Yes, they’re one of the most exciting things in Java in years. But deploying them in production without understanding the trade-offs is risky. #Java #ProjectLoom #Concurrency #Backend #SystemDesign

Sealed Classes Records Switch Expressions  Text Blocks Strong Encapsulation  Helpful NullPointerExceptions  Foreign Function & Memory API java-17-features. . . . . . . . . . #Java #JavaProgramming #JavaDeveloper #JavaCode #JavaScript #JavaCommunity #JavaTutorial #JavaLearning #JavaDevelopment #JavaLife #JavaLovers #JavaProjects #JavaCoding #JavaTips #JavaFramework #Java8 #JavaEE #JavaForBeginners #JavaGeek #JavaWorld #hackforge

Runnable vs Callable in Java: when to use which When working with ExecutorService, you typically submit tasks in one of two forms: Runnable or Callable. They may look similar (especially with lambdas), but they serve different purposes. #Java #Concurrency #Multithreading #SoftwareEngineering #BackendDevelopment

🚀 365-Day Java Challenge – Day 327 🚀 ⸻ 🔹 Day 327: String Immutability What is the output of the following code? String s = "Java"; s += " Rocks"; System.out.println(s); Options: A) Java B) Java Rocks C) JavaRocks D) Compilation error

Let’s test your Java fundamentals 👇 What is the purpose of the synchronized keyword in Java? A) Import libraries B) Handle exceptions C) Prevent concurrent thread access D) Speed up execution 💬 Comment your answer ✔ Correct answer: C 💡 Explanation: synchronized is used to control access to critical sections, ensuring only one thread executes at a time and preventing data inconsistency. 🎯 Take the full test: https://lnkd.in/ghXvtHJW #Java #Multithreading #SoftwareEngineering #Developers #CareerGrowth