THE JAVA REFERENCE FOR DEVELOPERS WHO ACTUALLY SHIP Every Java feature from Java 8 through Java 25 β 70+ features β in one sharp, no-fluff app. Built for backend engineers, interview preppers, and anyone tired of grepping release notes. WHAT'S INSIDE - 70+ features covering Java 8 through Java 25 (LTS) - Lambda, Streams, Optional and every Java 8 fundamental - Records, Sealed Classes, Pattern Matching β the modern ADT trio - Virtual Threads, Structured Concurrency, Scoped Values - Preview and Incubator features clearly marked, with a status legend - Direct links to the official JEP and Oracle docs for every feature LEARN MODE - Flashcards: flip-card study across every feature - Quiz: 10/15/20-question rounds with version, status, JEP-match, and hand-written trap questions. Tracks high score and best streak. - Interview Prep: deep prep content for 22 of the most-asked Java interview topics. Every topic breaks into why it matters, real question phrasings, key points, common traps, follow-up escalations, and a whiteboard-ready code snippet. DAILY USE - Filter by version (Java 8 to 25, LTS, or Experimental) - Category filter and full-text search - Bookmarks: save any feature for later - Changelog: browse what shipped in each version range - Share card: export any feature as an image for your team chat - Reading progress tracker CODE EXAMPLES (PRO) Unlock syntax-highlighted code examples for every feature with a single one-time purchase. No subscription. DESIGN Built with a brutalist, high-contrast aesthetic β no rounded corners, no gradients, just dense information and sharp borders. Designed to be glanceable at a glance and deep when you need it. Written in native SwiftUI. Fast. Offline. No tracking.