Core Java
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Understanding Ahead-of-Time (AOT) Caching in Java
Java applications have traditionally relied heavily on runtime class loading, linking, interpretation, profiling, and Just-in-Time (JIT) compilation. These mechanisms provide…
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G1 Isn’t the Only Default That Changed: A Java 25→26 Migration Reality Check
The real driver behind this migration isn’t curiosity, it’s a September 2026 licensing cliff. And what actually breaks isn’t quite…
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Array Covariance vs. Generic Invariance
Java’s type system disagrees with itself about one question: if String is an Object, is String[] an Object[]? Arrays say…
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Algebraic Data Types and Pattern Matching, Compared
Java, Rust, Scala, and Haskell all let you say “a Shape is exactly a Circle, a Square, or a Triangle,…
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Consistent Overflow: Two’s Complement and Modular Arithmetic
Java promises that Integer.MAX_VALUE + 1 always equals Integer.MIN_VALUE. That promise is exactly what let a bug hide inside the…
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Type Erasure and What It Actually Costs
List<String> and List<Integer> are the exact same class once the JVM gets involved. Here’s why Java made that trade, and…
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Project Leyden and AOT Caching: Is “Fast Startup” Actually Solved Now?
Java 26 just extended AOT caching to ZGC. Before you reach for GraalVM Native Image again, it’s worth asking what…
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Ad-Hoc Polymorphism: Interfaces vs. Traits vs. Type Classes
Three languages, three solutions to “different types, same operation” and three very different opinions about who gets to decide what…
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Solving MySQL Incorrect String Value Exception with Java
When working with Java applications and MySQL, one of the most common database exceptions developers encounter is java.sql.SQLException: Incorrect string…
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