Core Java
-
Convert Word Documents to HTML in Java Using Apache POI
Converting Microsoft Word documents into HTML is a common requirement for web publishing, document storage, and content transformation systems. In…
Read More » -
The Hidden Cost of Records: When Java Records Break Your Serialization, JPA, and Reflection-Heavy Code
Records are now a mainstream Java feature — clean, concise, and genuinely useful. But the introductory tutorials skip the part…
Read More » -
C# 13 & .NET 9 vs Java 25: The Feature Gap Has Closed — Now What?
For decades, Java and C# traded punches on language features. In 2026, however, that fight looks a lot more like…
Read More » -
Java Time API: Converting Between Date and Instant
Working with dates and times is a common requirement in applications, especially when dealing with distributed systems, APIs, or databases.…
Read More » -
Java’s Memory Model Is Not What You Think: The Gap Between the JMM Spec and the JIT’s Actual Guarantees
The Java Memory Model is formally specified. The JIT implements a superset of that spec in ways the spec permits…
Read More » -
Structured Concurrency and the Death of CompletableFuture Hell
What Java 21–26’s concurrency model actually changes at the architecture level. Not a feature tour — a genuine examination of…
Read More » -
Kotlin 2.x vs Java 21+The Language Choice for New JVM Projects
The K2 compiler shipped. Multiplatform went stable. Java landed records, pattern matching, and virtual threads. The gap genuinely narrowed —…
Read More » -
Sealed Classes and Exhaustive Pattern Matching: How They Change API Design, Not Just Syntax
Both features have been stable since Java 17 and 21. Most articles show the syntax. Almost none explain how they…
Read More » -
Java Module System in 2026: Still Ignored, Still Relevant
JPMS shipped with Java 9 in 2017. Nearly a decade later, enterprise adoption remains stubbornly low. This is not a…
Read More »
