Java Features

From Lambdas to Virtual Threads — every Java feature from 8 to 25, with deep interview prep, quizzes, and flashcards. The reference that also drills you.

THE JAVA REFERENCE FOR DEVELOPERS WHO ACTUALLY SHIP

Every Java feature from Java 8 through Java 25 — 70+ features — 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 — 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 — 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.