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Starwit Technologies GmbH | Java Basics | Overview

Java Basics

An introduction to the Java Programming Language

Chapter 01 - Setup & Preparation

  • Setting up dev environment
  • Run hello world
  • How does compiling work?
  • Git & Checkout
  • Tooling

Tasks

  • Run examples details see here
  • Run each example from your IDE
  • Debug each example from your IDE
  • Execute tasks for each example

Chapter 02 - Java

This section contains an introduction into the Java programming language. Next to the obligatory hello world moment, it shall also introduce base concepts of Java's syntax.

  • History
  • The Java Virtual machine
  • Java's core concepts
  • Standard library
  • Syntax introduction

Java's History

  • Compile once, run everywhere
  • Running apps on servers
  • Intermediary code
  • Three decades of optimization
  • OpenJDK & Java's release cycle

The Java virtual machine

Which runs everything, has been around forever and will become your best friend. width:700px

By Michelle Ridomi - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=35963523

Java's core concepts

  • Static typing
  • Garbage Collection
  • Class loading
  • References (vs pointers)
  • Packages

Syntax Introduction

  • Keywords
  • Operators
  • Basic data types
  • Control flow
  • Arrays
  • Methods
  • Static objects/methods
  • CLI Parameters

Tasks

  • Run examples details see here
  • Run each example from your IDE
  • Debug each example from your IDE
  • Execute tasks for each example

Chapter 03 - Libraries

  • Packages revisited
  • Dependency Management
  • Maven
  • How to read JavaDoc
  • Example libraries

Tasks

  • Run examples details see here
  • implement tasks from Readme

Chapter 04 - Object Oriented Development

  • OOD Concept
  • Static vs object attributes
  • Inheritance
  • Abstract Classes
  • Interfaces
  • Polymorphy
  • Generics

Tasks

  • Run examples details see here
  • implement tasks from Readme

Chapter 05 - Advanced Java Concepts

  • Lambda functions
  • Collection Framework
  • Exceptions
  • Unit tests
  • Property files
  • Working with files
  • Observing JVM doing its thing

Tasks

  • Run examples details see here
  • implement tasks from Readme

width:600px

By Ramlmn - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=64043967

width:600px

By ramlmn - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=64044187

Chapter 06 - A larger example

  • Let's build a football manager
  • Entity representation
  • Implementing functions

Tasks

  • Run examples details see here
  • implement tasks from Readme

Chapter 07 - Outlook

  • HTTP and network concepts
  • REST services
  • Defining APIs
  • First glimps Spring Boot

Tasks

License

All code examples in this repository are published under AGPL 3.0. License text can be found here.

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