Java

10 topics · AI-enhanced lessons

Enterprise-grade, platform-independent. Dominates Android and large-scale backends.

🟢 Beginner

4 topics

JVM, JDK, JRE, first Hello World

Primitives, wrapper classes, type casting

if/else, switch, for, while, do-while

1D/2D arrays, enhanced for, Arrays class

🟡 Intermediate

4 topics

Classes, objects, constructors, this keyword

extends, super, override, abstract, interface

try/catch/finally, custom exceptions, throws

ArrayList, HashMap, HashSet, LinkedList

🔴 Advanced

2 topics

Stream API, filter/map/reduce, method refs

Thread, Runnable, synchronized, ExecutorService

Beginner4 topics

Intermediate4 topics

Advanced2 topics