Java Programming

The language of enterprise, Android and massive systems. Strong typing, JVM magic and the world's most common job listing.

intermediate~40 hours16 topics~31h of lessonsRoadmap Level 1

Every CS skill sits on top of writing and reading code fluently in at least one language.

RECOMMENDED BEFORE THIS
○ Programming with C

These are suggested first. You can still open any topic — this only helps you pick an order.

Prerequisites:Programming with C
Learning Path
07 stages
16 topics · 7 stages0/16 completed
01

Fundamentals

Start from zero. Build the vocabulary.

Java Basics: JVM, JDK, first program~60 minbeginnerVariables, Types and Operators~60 minbeginnerControl Flow and Loops~45 minbeginner
02

Core Concepts

The ideas you cannot skip.

OOP in Java: classes, inheritance, polymorphism~120 minintermediateCollections Framework~90 minintermediateExceptions and Stream I/O~75 minintermediate
03

Intermediate

Connect ideas and go deeper.

Generics, Lambdas and Streams~90 minintermediateMultithreading and Concurrency~120 minadvancedJava I/O and NIO~60 minintermediate
04

Advanced

Beyond the basics.

JVM Internals and Memory Model~90 minadvancedModern Java: records, sealed types, pattern matching~60 minadvanced
05

Practice

Solve problems until it sticks.

Practice Set: Core & OOP~150 minintermediatePractice Set: Streams & Threads~120 minadvanced
06

Projects

Apply everything in real work.

Project: Library Management System~360 minintermediateProject: Console Game (Hangman)~240 minintermediate
07

Interview Prep

Convert knowledge into offers.

Java Interview Questions~90 minadvanced