Java 21 Virtual Threads vs Platform Threads: Performance Benchmarks and When to Use Each

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If you’ve been keeping up with the Java ecosystem, you already know that Java 21 virtual threads are one of the most significant concurrency improvements the platform has seen in decades. Finalized under Project Loom, virtual threads promise to fundamentally change how we think about scalable I/O in Java — but do the benchmarks hold … Read more

Hugging Face Trainer API: A Practical Guide for Fine-Tuning Models

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If you’ve been working with the HfArgumentParser to manage experiment configs, the natural next step is wiring those arguments into an actual training loop. The Hugging Face Trainer class handles that loop for you — gradient accumulation, mixed precision, evaluation scheduling, checkpoint saving — all configurable without writing boilerplate. This guide walks through the essentials … Read more

Tricky Java Multithreading Questions for Senior Developers – Part 3

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Tricky Java Multithreading Questions for Senior Developers – Part 3 Welcome back to our ongoing series of advanced Java concurrency interview questions. If you haven’t already, check out Part 1 and Part 2. In this installment, we tackle three more topics that separate the truly experienced Java engineers from the rest: StampedLock vs ReadWriteLock, the … Read more

Snake Game

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  Snake.IO Player 1 (Red): A/D to turn Player 2 (Blue): Left/Right Arrow to turn Reset Game

CyclicBarrier

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The CyclicBarrier class in Java is a synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point. Once all threads have reached the barrier point, they are all released to continue their execution. CyclicBarrier is reusable after the barrier is tripped, which makes it suitable … Read more

Tricky multithreading questions for senior developers – Part 2

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1. What are the potential issues with using synchronized blocks for thread synchronization in Java? Answer: Example Scenario:Two threads trying to acquire locks on two objects in different order, leading to deadlock: 2. Explain the “happens-before” relationship in the Java Memory Model (JMM). Answer: Common Happens-Before Relationships: 3. Describe a scenario where volatile is insufficient … Read more

Thread priorities on the Thread or Runnable.

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In Java, thread priorities are a property of the Thread class, not the Runnable interface. Therefore, you cannot directly set the priority on a Runnable. Instead, you set the priority on the Thread that is running the Runnable. Here’s how you can set the priority of a Thread that runs a Runnable: Example Explanation Output … Read more

ReentrantLock in Java and thread priorities.

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The fairness policy of a ReentrantLock in Java does not directly take into account the thread priorities. Instead, it ensures that threads acquire the lock in the order they requested it, following a first-come, first-served (FCFS) policy when the fairness flag is set to true. This helps prevent thread starvation and provides a more predictable … Read more