On inheritance and subtyping
Java is the first language I learned in my career. Its structure is foundational in my early years of understanding programming concepts. …
Friends Of OpenJDK Today
Every article on foojay.io, newest first: OpenJDK, the JVM, Java tooling and the ecosystem around them, written by the Java community.
Receiving mails in Java with IMAP or POP3
There is a lot of documentation for sending mails, but gathering information about the receiving and processing part is less easy. This …
Challenge yourself with Application Observability Code Challenges
Quite a few developers are struggling to get up to speed with applying observability practices!
How JVM handles exceptions
It's interesting to know how the JVM runs bytecode instructions... But do you know what is going on when an exception is thrown? How does …
Fixed Window Counter Rate Limiter (Redis & Java)
Learn how to implement a Fixed Window Rate Limiter with Redis and Java! This detailed guide covers everything from the basics of …
3,670 viewsFoojay Podcast #65: Boost Your Career in 2025!
With the first Foojay podcast of 2025, we want to help you to boost your career!
The slow Death of the onjcmd Debugger Feature
Learn about the rise and fall of the onjcmd Java debugger feature, from its inception to its eventual removal.
Reflections on 2024: OmniFish, GlassFish, Piranha, Jakarta EE
As we look to the future, our momentum only grows stronger!
An Example of HACS: Adaptive Lighting
Configure the Adaptive Lighting integration to our Home Assistant and benefit from different intensities based on the time of the day.
Rate limiting with Redis: An essential guide
Discover the essentials of rate limiting with Redis. Learn about popular algorithms like Leaky Bucket, Token Bucket, and Sliding Window, and …