Category Archives: Без рубрики

Yes, new instances of a class can be created while a static synchronized method is executing. Let’s break it down: 🔒 static synchronized method It locks on the Class object, not on an instance. So, if thread A is executing … Continue reading →

Let’s walk through the 6 thread states in Java, according to the java.lang.Thread.State enum. 🧵 Java Thread States State When It Happens NEW Thread object is created, but start() has not been called RUNNABLE Thread is ready to run or … Continue reading →

Let’s compare wait()/notify() (used with synchronized) and Condition (used with ReentrantLock) — both are used for thread coordination, but Condition gives you more flexibility. We’ll walk through: A wait()/notify() example A Condition example doing the same thing Scenario: We have … Continue reading →

🔎 Key Criteria to Decide: Do you need mutual exclusion? Do you need only visibility or atomicity? Do you need fine-grained locking or advanced features like try-lock, fairness, etc.? Are threads coordinating around a condition (like a signal or phase)? … Continue reading →

🧠 1. Intrinsic (Built-in) Synchronization This is the most commonly used type of synchronization in Java, based on monitors. A. Synchronized Method Locks on the current object (this) For static methods, it locks on the class object (ClassName.class)

🧠 What is Synchronization? Synchronization is the process of controlling access to shared resources by multiple threads to prevent race conditions, data inconsistency, and memory visibility issues.

💡 First: A Monitor in Java = A Mutex + Condition Variable Java’s monitor is not just a lock — it’s a synchronization mechanism that includes: a mutex (for mutual exclusion) zero or more condition queues (for waiting/notification: wait(), notify())

🧠 First, What Is a Monitor? A monitor is a mutex (mutual exclusion lock) + condition variable attached to every object in Java. Every Java object has one monitor. A monitor ensures that only one thread at a time can … Continue reading →

Let’s unpack it carefully — the short answer is: ✅ they behave the same, but 🚀 give you flexibility in different contexts.

🧠 What Is a Monitor in Java? A monitor is a synchronization construct that allows threads to have mutually exclusive access to critical sections of code or data. In Java, every object has an implicit monitor — yes, even a … Continue reading →