A dual-purpose tutorial to 1) Demonstrate how to implement the Simple Query Protocol, where Java is an implementation detail; 2) Show practical examples of most of the new features since JDK 17, including Records, Sealed Types, Pattern Matching for Switch... (more…)

This post provides an overview of Gradle’s Java 9 support, touching on runtime, cross-compilation, MRJARs, and Jigsaw modules support. We’ve fielded lots of questions since Java 9 was released last month, and decided it best to answer here. (more…)

The challenge Sheldon, Leonard, Penny, Rajesh and Howard are in the queue for a “Double Cola” drink vending machine; there are no other people in the queue. The first one in the queue (Sheldon) buys a can, drinks it and doubles! The resulting two Sheldons... (more…)

JEP 431: Sequenced Collections has been promoted from Candidate to Proposed to Target status for JDK 21. It proposes introducing "a new family of interfaces that represent the concept of a collection whose elements are arranged in a well-defined sequence ... (more…)

Java currently supports only two types of value: primitives and object references. Project Valhalla extends this by introducing inline classes which are a new form of type that exhibit some behaviors of both. These new types open the door to better alignm... (more…)