Language

Java — Programming with Java

A powerful, popular language for enterprise apps, Android and big systems — and a great way to learn object-oriented programming from scratch with small, hands-on examples.

36 lessons7 chaptersStart: What is Java? →

1Java Basics

What is Java?20 min Setting Up Java (JDK, javac, java)25 min Your First Program30 min Variables & Types30 min Operators (Maths & Comparisons)30 min Reading Input with Scanner30 min

2Control Flow

Making Decisions (if / else)30 min The switch Statement25 min Repeating with for Loops30 min while Loops25 min Methods (Parameters & Return)35 min Arrays30 min

3Object-Oriented Java

Classes & Objects35 min Constructors30 min Encapsulation (private, getters & setters)35 min Inheritance (extends)35 min Polymorphism (Overriding)35 min Interfaces30 min Abstract Classes & Abstraction35 min Method Overloading, this & super35 min

4Useful Java

Collections (ArrayList & HashMap)35 min Handling Errors (try / catch)30 min Strings in Depth & StringBuilder35 min Generics (Type-Safe Containers)35 min The Collections Framework & Sorting40 min Exception Handling in Depth40 min

5Going Deeper (Modern & Professional Java)

Enums (Fixed Sets of Values)25 min Lambdas & the Streams API45 min Reading & Writing Files40 min Multithreading & Concurrency45 min JDBC — Connecting Java to a Database45 min

6Professional Java Toolkit

Wrapper Classes, Autoboxing & Packages35 min Modern Java: var, records & Optional40 min Build Tools: Maven & Gradle35 min Unit Testing with JUnit40 min

7Project

Project: Console Bank Account120 min