Flutter and Dart Cookbook

Chapter 5. Getting Started with Object-Oriented Dart

In this section we introduce object-oriented techniques for working with classes and demonstrate how these can be used together with Dart. Over the course of the chapter you will explore both declaration and extension of objects. These techniques are important, as Dart is an object-oriented language. Learning the basics will provide a good reference to increase your own skill levels and incorporate other people’s code more easily.

The chapter begins with a brief overview of the key terminology associated with object-oriented programming in relation to Dart. We then discuss how to incorporate a class into your programming repertoire. In addition, we also cover:

• The basics of object-oriented programming

• The need for class initialization through constructors

• Supporting inheritance through the extends keyword

• Defining a class signature by using an interface

• Aggregating class functionality with a mixin

As your development becomes more sophisticated, you will be able to utilize custom classes to achieve your requirements. Becoming efficient with classes has a steep learning curve, so take small steps. Over time, you will naturally improve and be able to incorporate very complex subject matter into your general solutions.

5.1 Beginning Object-Oriented Dart

Problem

You want to use object-oriented programming with Dart to build reusable components.

Solution

Use object-oriented techniques with Dart to develop code reflecting ...