JVM Internals
Understanding the JVM: More Than Just a Runtime
When I first started coding Java, I treated the JVM like a magic box. Write code, hit run, and somehow it works on Windows, Mac, and Linux. But once I star…
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JVM Internals
DevOps
Containerizing Java Apps: Docker and Kubernetes
The days of deploying a WAR file to a Tomcat instance on a virtual machine are fading. Most Java shops are moving to containers. I started Dockerizing my S…
Advanced Java
Using GraalVM for Native Images: Faster Startup, Lower Memory
The biggest criticism of Java in the serverless world has been startup time. A cold start of a Spring Boot app can take 20-30 seconds. GraalVM changes that…
Performance
Java Memory Management: Avoiding OutOfMemoryErrors
My worst production moment was at 3 AM on a Saturday. The application started throwing `OutOfMemoryError`. The heap was full, and the GC was thrashing. I h…
Modern Java
Exploring Java 21: Virtual Threads Are a Game Changer
I’ve been waiting for virtual threads (Project Loom) for years. Traditionally, Java’s concurrency model was based on operating system threads, which ar…
JVM Languages
Kotlin vs. Java: A Coexistence Story
When Kotlin first came out, I thought it was just a fad. But after Google made it first-class for Android, and I saw my colleagues writing less boilerplate…