THE JAVA REVERSE ENGINEERING ACADEMY

Understand what
runs beneath.

Learn to explore Java bytecode, trace Minecraft-style client systems, and investigate original training JARs. From your first Recaf session to your next big breakthrough.

44 guided lessons9 original labsLearn at your pace

Nebula ClientOriginal Java training environment

TRAINING LAB

⌑ nebula / src / academy / nebula

01 public void onKey(int key) {
02   for (Module m : modules) {
03     if (m.keybind == key)
04       m.toggle();
05   }
06 }

↳A key press flows through the module registry and toggles a matching module.

JAVA 21READ • TRACE • UNDERSTAND

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AVAILABLE CHALLENGES—

YOUR SOLVES—

CHALLENGE XP—XP

ACADEMY LESSONS44

FEATURED LEARNING ENVIRONMENT

Learn by investigating.

Explore Nebula, an original offline Java simulator built for learning Minecraft-client concepts. Analyze its module system, event handlers, settings, and mock authorization flow.

RECAF + JAVATRACE EXECUTIONPRACTICAL EXERCISES

nebula-client / ModuleManager.java↗

01public class ModuleManager {

02 void onKey(int key) {

03 for (Module m : modules) {

04 if (m.keybind == key)

05 m.toggle();

06 }

07 }

08}

OFFLINE TRAINING SIMULATOR JAVA 21 · EDUCATIONAL

/ 02 Challenge library Purpose-built Java analysis exercises

Challenge	Difficulty	Category	Points	Status

Understand whatruns beneath.

Learn by investigating.

Understand what
runs beneath.