A Visual Diff of Java’s Evolution: Inside java.evolved
A community site showcasing legacy Java patterns alongside modern equivalents to help developers understand how everyday Java code has …
A N M Bazlur Rahman
89 articles
Announcing: Sustainability for Java Developers
Java developers from around the world are writung a book about a question that's becoming impossible to ignore: how do we write software …
AI Applications with LangChain4j Guardrails and Spring Boot
Learn how to build secure AI applications using LangChain4j guardrails in Spring Boot. Implement input/output validation, prevent prompt …
Java’s Structured Concurrency: Finally Finding Its Footing
Explore the refined Java Structured Concurrency API. Learn about new task scopes, joiners, and improved error handling for cleaner, more …
Building FormPilot
My Journey Creating an AI-Powered Form Filler with RAG, LangChain4j, and Ollama
Enhancing LLM’s Conversations with Efficient Summarization
LangChain4j already provides two types of memory eviction policies, lets adopt a third one: SummarizingTokenWindowChatMemory
Java Tips # 01 - Writing Shebang Scripts in Pure Java
Learn how to write a Java CLI shebang script and run it from the terminal, leveraging Java 11 and beyond to create simple, effective …
Interview with a Java Champion: Reflections on a Storied Career and Insights for the Next Generation
Java Champion Ben Evans shares his journey, insights on Java's evolution, and advice for developers in this insightful interview.
Creating a Command Line Tool with JBang and PicoCLI to Generate Release Notes
Learn how to create a Java command-line tool with JBang and PicoCLI to automate generating release notes from GitHub.
Java's Unsafe is Finally Going Away
Java's sun.misc.Unsafe is being phased out. Learn safer memory access using VarHandle and Foreign Function & Memory API to keep your …
Exploring New Features in JDK 23: Simplifying Java with Module Import Declarations with JEP 476
JEP 476 represents a significant step towards simplifying Java programming by reducing boilerplate code and improving readability.
Exploring New Features in JDK 23: Simplifying Java with Primitive Type Patterns with JEP 455
How JEP 455 can be utilized to handle complex decision-making scenarios more efficiently. We'll examine a practical example to illustrate …
Records for Cleaner and More Expressive Parameterized Tests in JUnit 5
Discover how Java records enhance parameterized testing in JUnit 5. Learn to create cleaner, more expressive, and type-safe tests.
Journey of a Java Champion: Bert Jan Schrijver's Path to Mastery and Community Leadership
Explore the insightful journey of Bert Jan Schrijver, a Java Champion, as he discusses his path in software development, the role of …
Diagnose and Mitigate Pinning in Java's Virtual Thread Execution
In the context of virtual threads, pinning refers to the condition where a virtual thread is "stuck" to its carrier thread (the platform …
Web Crawling in Java: Classical Threads and Virtual Threads
Explore the intriguing world of web crawling in Java through a comparative lens: classical threads vs. virtual threads.
Exploring the Impact of Stack Size on JVM Thread Creation: A Myth Debunked
This article debunks the commonly held belief that stack size influences the number of native threads that can be created in a JVM …
A Look at Sealed Classes, Pattern Matching, Functional Paradigms
Let's examine the principles and practical applications of Sealed Classes and pattern matching in Java.
Unlocking Java Wisdom: A Conversation with Oracle ACE Simon Martinelli
Explore insights from Simon Martinelli, Oracle ACE Associate, as he discusses his journey in Java development, the importance of simplicity …
Testable Code: A Journey Through Consideration and Refactoring
By considering real-world examples and learning from the process of refactoring and testing, we can create robust and maintainable code!
Exploring File Storage Solutions in Spring Boot
In this article, we will cover how to store files in a database using Spring Boot and discuss some alternatives.
Thread-Safe Counter in Java: A Comprehensive Guide
In this tutorial, we will explore the concept of thread safety in Java, specifically focusing on a simple counter.
Sealed Interfaces & Pattern Matching: Java's Modern Capabilities
Sealed classes and interfaces with pattern matching provide powerful new tools for more explicit, controlled, and flexible design in Java.
Book Review: "OpenJDK Migration for Dummies"
Not just a technical manual, Simon Ritter's new book is a companion on a journey through the complexities of OpenJDK migration.
Preparing for JDK 21: A Comprehensive Overview of Key Features and Enhancements
As we inch to the release of JDK 21 in September (next month!), get familiar with the features and improvements this version will bring!
Busting Myths, Building Futures: A Conversation with Cay Horstmann on Java and Machine Learning
Cay Horstmann shares his experiences with Java, his writing process for technical books, the challenges of teaching Java, and discusses its …
Dive into the OpenJDK: Top 10 Reads on Foojay.io
Foojay.io is a community platform dedicated to the needs of developers who use the OpenJDK and related technologies.
Charting the Course of Java: An Insightful Conversation with Java Champion, Sebastian Daschner
Explore the world of Java with Champion Sebastian Daschner, discussing his journey, future trends in Java, and tips for developer growth.
The Evolution of Java: Challenging Stereotypes and Embracing Modernity
Dive into the modern evolution of Java, challenging stereotypes and showcasing its transformative features.
Exploring the Depths of Java: A Comprehensive Conversation with Jakob Jenkov, Part-II
Explore the first part of our in-depth interview with Jakob Jenkov, an experienced Java developer and AWS solution architect, as he shares …
Exploring the Depths of Java: A Comprehensive Conversation with Jakob Jenkov, Part-I
Explore the first part of our in-depth interview with Jakob Jenkov, an experienced Java developer and AWS solution architect, as he shares …
Exploring Java 21's Intriguing Additions (Part 1)
Learn about a few notable features that stand out in the upcoming Java 21, in an overview of their functionalities and potential use cases.
Breaking the Code: How Chris Newland is Changing the Game in JVM Performance!
Dive into an exclusive interview with Chris Newland, the creator of JITWatch. Explore JVM performance optimization, and gain expert advice.
Cracking Code and Conventions: An Exclusive Interview with Nicolas Fränkel
Join us as we explore Nicolas Fränkel's journey in software development, industry challenges, and the potential role of AI in the future of …
Resilience in Coding: Miro Wengner on Thriving in the Software Industry
Dive into our interview with software engineer Miro Wengner as he discusses his career, software challenges, and insights from his …
JConf Toronto 2023 and the Dawn of a New Era of Concurrency
Experience the intersection of expertise, innovation, and camaraderie at JConf Toronto 2023, a unique platform.
An Industry Expert's Guide to Thriving in Software Development and Security
Uncover the dynamics of software development and product management in our discussion with Erik, Senior Director at Azul. Learn about his …
Announcing "Java Unscripted: An Asynchronous Exploration of Excellence
"Java Unscripted" is an exciting interview series featuring insights from Java industry luminaries. Join us as we explore their journeys, …
Discovering the Secrets to Success: An Exclusive Interview with Michael
Discover valuable insights from Java Champion Michael P. Redlich and learn about continuous learning, open-source contributions, and …
A Comprehensive Guide to Java Virtual Threads (Part 1)
Learn about Java Virtual Threads, how they simplify concurrent programming, how they overcome the limitations of traditional Java threads.
Unlocking Java Secrets with Frank Delporte Foojay.io Today
Learn about Frank Delporte, Java Champion and Azul technical writer at Azul, on Java, resources for beginners, insights into in the …
Unlocking the Secrets to a Successful Software Engineering Career: An Interview with Otavio Santana
Discover insights from Otavio Santana on the importance of open-source contributions, mentorship, and simplicity in software engineering, as …
Debate on the Future of Java and Kotlin on Foojay.io Today
In this article, we look at a discussion on Foojay's Slack comparing Java and Kotlin, showing why developers should join the platform.
Navigating the Challenges of Modern Software Development: An Exclusive Interview with Shai Almog
Join our interview with Java expert Shai Almog, as he shares his journey and offers valuable advice for developers, discussing mentorship …
From Assembler to Chat-GPT: Steve Poole on the Shifting Landscape of Programming
Discover insights from seasoned Java developer Steve Poole on the ever-evolving software landscape, career growth, and lessons learned …
Comparing Map.of() and new HashMap() in Java
Discussion of the use of Map.of() and new HashMap() in Java, the difference between them, and the benefits of using Map.of().
From Law Degree to Java Champion: Geertjan Wielenga on the Success of Java and Navigating the Software Industry
Discover insights from Geertjan Wielenga, a Java Champion and developer advocate, on how to succeed in the software industry and the …
My Adventures at ConFoo Conference in Montreal
I attended the ConFoo conference in Montreal for a day, gave two talks on Java, and met with old and new friends, and had a great …
Java Sealed Classes: Building Robust and Secure Applications
Sealed classes can help you create more robust and maintainable code by restricting the inheritance hierarchy of your classes and …
Optional in Java: A Swiss Army Knife for Handling Nulls and Improving Code Quality
Optional is a Java class that provides a way to handle null values in a type-safe and efficient manner. This tutorial will cover the …
Java Bytecode: Journey to the Wonderland (Part 3)
Java bytecode may be modified to provide functionality, profile code, or obfuscate it. We'll examine examples in this brief article.
Why Many Developers Don't Write or Give Talks
Learn why developers may not write or give talks and how sharing knowledge and experiences can improve communication skills, and much more!
Why Did We Choose JSF for the Eclipse Starter for Jakarta EE?
This article explains why we chose JSF to build the Eclipse starter for Jakarta and why it deserves more love and attention!
A Minor But Useful Refactoring Technique That Would Reduce Your Code Footprint (Part 2)
This is a continuing attempt to refactor from Java 11 to later versions of Java, and today's topic is about two methods of the Stream API.
Foojay Podcast #6: Welcome to Foojay!
Let's look back and what has happened on Foojay during the last 2,5 years and talk to some of the people behind the project.
Minor Techniques That Would Reduce Your Code Footprint (Part 1)
That was a long-awaited migration, but I'm pleased that we eventually made it. The next thing... "Why not Java 17 directly?"
What Does The JVM Look Like, How Does It Work?
In this article, the internal workings of the JVM are discussed, e.g., interpreter, JIT compiler, and how it optimizes code.
The 5 Most Pivotal and Innovative Additions to OpenJDK 19
Although OpenJDK 19 is not an LTS, it is still a significant release, in my opinion. It includes several game-changing features!
Java Thread Programming (Part 15)
Let's learn how to do asynchronous method invocation with Callable and Future by means of a practical example.
Java Bytecode Simplified: Journey to the Wonderland (Part 2)
Let’s appreciate the Java Virtual Machine (JVM) even more. Today we'll discuss Constant Pool in quite some detail.
Top 7 Features in Jakarta EE 10 Release
Jakarta EE is a dominant force behind all enterprise development in Java. Check out my favorite top 7 features, what are yours?
How to Add an Event to the Foojay Event Calendar
If you want to add an event to our calendar or advertize your event on Foojay.io, you can follow the following steps!
Book Review: Monolith to Microservices (Part 2)
In many cases, microservices are probably not ideal, but if we are to do it, we should take baby steps. Let's find out the what alternatives …
Book Review: Monolith to Microservices (Part 1)
Do we need to do all modern development via the microservices architecture? Is it the norm, the new standard? This book argues differently.
How to run the Java Incubator Module from the Command Line and IntelliJ IDEA
In this article, we explored how the Java incubator modules can be run through command line and using IDE, such as IntelliJ IDEA.
How to enable java preview feature and run code from IntelliJ IDEA
JEP 425: Virtual Threads (Preview) has been proposed recently. I wanted to give it a try on my favourite IDE, this article shows you how to …
How To Submit Your Next Article On Foojay.io
The complete guide to publishing your article on Foojay.io: prepare a content folder from the template, add your images, and submit it by …
Top 10 Java Language Features
Let's explore ten Java programming features used frequently by developers in their day-to-day programming jobs.
Three Mistakes Developers Make Preventing Getting Hired On Projects
From experience, I have seen three big mistakes every junior software developer makes that could easily be solved.
5 Things You Probably Didn’t Know About Java Concurrency
Even while threads are helpful, they are dreadful to many developers. Here are five essential threading concepts for Java developers!
7 Reasons Why, After 26 Years, Java Still Makes Sense!
After many discussions with Java developers, combined with my personal experiences with the Java community and platform, here are the key …
Java Bytecode Simplified: Journey to the Wonderland (Part 1)
Today I will make an attempt to appreciate how unique the JVM is. So, let’s begin the journey to how Java works!
Java Thread Programming (Part 14)
What happens if the child-task creates more tasks and the parent-task waits for the child-tasks to finish in TheadPool in java.
7 Ways to Improve Your Code Reading Skills
As more and more companies go Agile, being able to read other's code is more important than ever. Read on for some tips on how to improve …
Java Thread Programming (Part 13)
What is the maximum number of worker threads we can put in a ThreadPool? Let's find out today on Foojay's amazing Java threading series!
Java Thread Programming (Part 12)
Let's find out what are the ways to create ThreadPool using Executor framework in java and use result-bearing tasks using Callable and …
Java Thread Programming (Part 11)
Learn how to ask the executor framework at startup to provision threads for us and they will be reused as long as the application runs.
Java Thread Programming (Part 10)
Let's learn about BlockingQueue, one of the essential concurrent collections available in the concurrent package in the JDK.
Java Thread Programming (Part 9)
Let's continue the discussion and share a few more thread-safe classes that we can use in our day-to-day coding!
Java Thread Programming (Part 8)
I will try to explain in a very simplified way what Java thread safety is and how we can achieve it while we write our day-to-day code!
Java Thread Programming (Part 7)
Can we create as many Java threads as we want? I will try to come up with an answer via an exercise, so bear with me!
Java Thread Programming (Part 6)
Have you ever wondered what is the purpose of the "wait()", "notify()", "notifyAll()" methods that come with each Java object?
Let’s Use Optional to Fix Method Contracts
Optional is a mystery box, a wrapping paper: it may not contain value. When we specify that in a signature, we assume the box might be …
Java Thread Programming (Part 5)
When a thread acquires a lock object, no other thread will be able to use it. Once a thread unlocks the lock, other threads acquire it …
Java Thread Programming (Part 4)
We need to be very careful when using the "volatile" keyword, and we should use it only where it’s required, and definitely not everywhere.
Java Thread Programming (Part 3)
Tip: We can only ask the Java thread to execute a piece of code, but we cannot guarantee the execution order of multiple threads!
Java Thread Programming (Part 2)
Let's see an example of where we can use Threads. Let's assume we are building a web server that returns the most used words in a website.
Java Thread Programming (Part 1)
To be able to execute a piece of code requires an execution environment. In Java, a thread is an executing environment.
Reclaim 25% of Java Heap Memory & Lower Your Cloud Bills
Learn how using compact strings can help you reclaim 25% of Java heap memory and lower your Cloud bills... very easily.