Coding Languages

Learn Java

3 plans — 20 lessons

Core OOP, collections, and beginner-friendly console apps.

Beginner Path14-day sprint

14-day sprint

Learn Java in 14 days

Core OOP, collections, and beginner-friendly console apps.

Java setup and first class
Types, variables, and control flow
Classes, objects, and methods
+3 more topics

Start plan

Intermediate Path21-day sprint

21-day sprint

Intermediate Java in 21 days

Streams, lambdas, Optional, Spring Boot basics, and multithreading for professional Java development.

Streams and lambda expressions
Functional interfaces and method references
Optional and null safety
+4 more topics

Start plan

Advanced Path30-day sprint

30-day sprint

Advanced Java in 30 days

JVM internals, design patterns, CompletableFuture, Spring Data JPA, and production-grade architecture.

JVM internals and memory model
CompletableFuture and reactive programming
Design patterns in Java
+4 more topics

Start plan

What You'll Learn

01Foundation

Java setup and first class

Install the JDK, compile, and run your first class.

setupjdkbasics

02Foundation

Types, variables, and control flow

Work with primitives, loops, and conditionals.

typesloopssyntax

03Core

Classes, objects, and methods

Build reusable classes and understand OOP basics.

oopclassesmethods

04Core

Collections and generics

Use lists, maps, and type-safe collections.

collectionsgenericsdata structures

05Core

Exceptions, files, and packages

Handle errors, read files, and organize packages.

exceptionsfilespackages

06Challenge

Mini project: console app

Build a small console-based Java program.

projectconsolepractice

Build Java skills that stick

14 days of OOP, collections, and exception handling — capped with a real console app you build yourself.

Start learning

Java always felt overwhelming until I followed this plan. The incremental structure made it click.

— Max V., CS student

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