Visual summaries that help you grasp it like never before.

Hand-drawn skribbles that make tricky engineering concepts click — internals, gotchas, and the mental models behind the code.

54 topics25 free1 tracks

Courses

54 topics · 5 modules

Inside put & get - hashing, buckets, collisions

Concise syntax for anonymous functions

Autoboxing - primitives meet objects

Partial blueprint - some methods, some holes

Blueprints and instances - the core of Java

Initialize objects - same name as class, no return type