Java Bean Bag

🚀 “How are Virtual Threads different from Thread Pools?” 😵 “Are they OS threads or JVM threads?” 🙃 “Should I still use CompletableFuture?” 🤯 “How do I even use them in real-time microservices?” 🧠 What are Virtual Threads? Virtual Threads (introduced in Java 21 as stable 🎉) are lightweight threads managed by the JVM instead of the OS kernel. 👉 They look like normal threads, but don’t hog OS resources like traditional threads. 🧠 What is the OS Kernel? 🏛️ OS Kernel = The Brain of the Operating System It’s the core part of your OS (Windows, Linux, Mac) that: Manages memory 🧠 Schedules threads 🕒 Talks to hardware 💻 Handles I/O operations 📨 When you create a traditional thread in Java, the JVM asks the OS Kernel to create a real OS-level thread. 🖼️ Imagine This... ┌───────────────────────────┐ │ Your Java Application │ └────────────┬──────────────┘ │ ...