Book Image

Java Fundamentals

By : Gazihan Alankus, Rogério Theodoro de Brito, Basheer Ahamed Fazal, Vinicius Isola, Miles Obare
Book Image

Java Fundamentals

By: Gazihan Alankus, Rogério Theodoro de Brito, Basheer Ahamed Fazal, Vinicius Isola, Miles Obare

Overview of this book

Since its inception, Java has stormed the programming world. Its features and functionalities provide developers with the tools needed to write robust cross-platform applications. Java Fundamentals introduces you to these tools and functionalities that will enable you to create Java programs. The book begins with an introduction to the language, its philosophy, and evolution over time, until the latest release. You'll learn how the javac/java tools work and what Java packages are - the way a Java program is usually organized. Once you are comfortable with this, you'll be introduced to advanced concepts of the language, such as control flow keywords. You'll explore object-oriented programming and the part it plays in making Java what it is. In the concluding chapters, you'll get to grips with classes, typecasting, and interfaces, and understand the use of data structures, arrays, strings, handling exceptions, and creating generics. By the end of this book, you will have learned to write programs, automate tasks, and follow advanced courses on algorithms and data structures or explore more advanced Java courses.
Table of Contents (12 chapters)
Java Fundamentals
Preface

Object-Oriented Principles


OOP is governed by four main principles, as follows. Throughout the rest of this lesson, we will delve further into each of these principles:

  • Inheritance: We will learn how we can reuse code by using hierarchies of classes and inheriting behavior from derived classes

  • Encapsulation: We will also look at how we can hide the implementation details from the outside world while providing a consistent interface to communicate with our objects through methods

  • Abstraction: We will look at how we can focus on the important details of an object and ignore the other details

  • Polymorphism: We will also have a look at how we can define abstract behaviors and let other classes provide implementations for these behaviors