Java is a high-level, class-based, object-oriented programming language.
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
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
Fair locks in Java are a type of lock that ensures threads acquire the lock in the order they requested it, adhering to the first-come, first-served (FCFS) principle. This helps in preventing thread starvation, where certain threads might never acquire the lock due to continuous acquisition by other threads. Using Fair Locks with ReentrantLock The … Read more
Embarking on a journey into software development is exciting, but it’s also fraught with pitfalls that can hinder progress. Here, we discuss some typical blunders made by new developers and offer tips on how to avoid them. 1. Not Reading Error Messages Blunder: Ignoring or not thoroughly reading error messages, leading to unnecessary confusion and … Read more
After years of development under Project Panama, the anticipated “Foreign Function & Memory API” (FFM API) has finally been introduced in Java 22, marking a significant milestone in Java’s capability to interact with non-Java code and external memory. In this article, we will explore the nuances of this new feature, its advantages over the older … Read more
Java Development Kit 22, the latest iteration of the Java Standard Edition, is now officially available as a production release. This version introduces a suite of 12 new features, enhancing functionality with improvements such as a second preview of scoped values and a new preview of stream gatherers. What’s New in JDK 22? Enhanced Pattern … Read more
Java 19 continues the tradition of enhancing the developer experience with several new features aimed at streamlining code and improving efficiency. Among the most notable additions are Record Patterns, further improvements to instanceof, and structured concurrency. This update also includes important deprecations and removals that developers should be aware of. New Features in Java 19 … Read more
In Spring applications, the `Environment` interface plays a crucial role by offering access to the configuration properties. A null reference to this crucial component can halt the execution of your application, as seen in the error message: “cannot invoke “org.springframework.core.env.Environment.getProperty(String)” because “this.environment” is null”. Understanding the root causes and implementing the right solutions is essential … Read more
In the context of building reactive applications with Spring WebFlux, the `WebClient` is a pivotal component for making non-blocking web requests. Encountering a `NullPointerException` with the message “cannot invoke “org.springframework.web.reactive.function.client.WebClient.get()” because “this.webclient” is null” can be a frustrating hurdle. This article explores why this error occurs and provides practical solutions to fix it. What Causes … Read more
Working with Hibernate in Java applications involves managing sessions, which are fundamental for ORM operations. The error “cannot invoke “org.hibernate.engine.spi.SharedSessionContractImplementor.getPersistenceContext()” because “this.session” is null” is a common challenge that developers face, indicating that a Hibernate session expected to be active is, in fact, null. This article discusses why this error occurs and how to resolve … Read more