Category Archives: Без рубрики

Scenario Can you do it? How? Start a thread without calling start() ❌ No start() is required Start a thread from another thread externally ❌ No Caller must control it Force a paused/sleeping thread to resume ❌ Not directly You … Continue reading →

✅ The Thread class in Java just implements the Runnable interface. so… 🧵 The Core Difference Method What it Does start() Starts a new thread of execution (calls run() on a new thread) run() Just a normal method call, executes … Continue reading →

Let’s break it down step by step: 🧠 Core Difference Concept Thread Runnable What is it? A class that represents a thread of execution A functional interface (task to run in a thread) Role Executes the code Defines the code … Continue reading →

🔨 1. Extending Thread Class ✅ Easy to use❌ Can’t extend another class (Java has single inheritance)

🌱 What Are Green Threads? Green threads are threads that are scheduled and managed entirely by the JVM (or user-level runtime), not the OS. That means: The JVM simulates threading using only one OS thread (or very few) Thread switching … Continue reading →

🧠 What’s the Difference Between a Process and a Thread? Feature Process Thread Definition A program in execution (independent) A lightweight unit of execution within a process Memory Has its own memory space Shares memory with other threads in same … Continue reading →

🧩 1. Ordering Ordering is about the sequence of execution of operations (like reads and writes). It matters because compilers, JVM, and CPUs may reorder instructions to optimize performance. You’d assume x is set before y, but the JVM might … Continue reading →

🧠 What is Cooperative Multitasking? 🧩 Cooperative multitasking means:Tasks (threads/processes) voluntarily yield control of the CPU so others can run. 🔧 How It Works: The OS does not forcibly interrupt a running task. It relies on each task to be … Continue reading →

❓ Can you adjust ThreadPoolExecutor to run on different cores? ⚠️ Short Answer: Not directly in Java — you cannot manually bind threads to specific cores using ThreadPoolExecutor or Java alone. But… ✅ Long Answer: You can influence it indirectly … Continue reading →

✅ Yes, ForkJoinPool is more effective than ThreadPoolExecutor in certain scenarios — but not always. Let’s dive into when and why ForkJoinPool outperforms ThreadPoolExecutor, and when it might not.