DART CLASSES AND OBJECT - OBJECT ORIENTED PROGRAMMING TUTORIALS
Dart Classes and Object
Object Oriented Programming: Getting Started
Defining Class and creating Objects
Instance and field variables
Dart classes are the blueprint of the object, or it can be called object constructors. A class can contain fields, functions, constructors, etc. It is a wrapper that binds/encapsulates the data and functions together; that can be accessed by creating an object. A class can refer to as user-define data type which defines characteristics by its all objects.
We can assume a class as a sketch (prototype) or a car. It contains all the details about model name, year, features, price, etc. Based on these properties of the car, we can build the car. Here the car is an object. There can be many cars so we can create many objects of cars to access all the properties.
Defining a Class in Dart
Dart provides class keyword followed by a class name is used to define a class; all fields and functions are enclosed by the pair of curly braces.
Dart Object
Dart is object-oriented programming, and everything is treated as an object in Dart. An object is a variable or instance of the class used to access the class's properties. Objects have two features - state and behavior. Suppose a man is an object with a state (name, age, health) and behavior (walking, running, and sleeping). Programming objects are theoretically similar to the real-life objects; they also have state and behavior. An object is created from a template which is known as class.
The fields of the classes are stored as object states, whereas the method represents an object's behavior.
Creating Class Objects in Dart
After creating the class, we can create an instance or object of that class which we want to access its fields and functions. The new keyword is used to declare class followed by the class name.
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