In Java, it is possible to inherit attributes and methods from one class to another. We group the "inheritance concept" into two categories: Show
To inherit from a class, use the In the example below, the Example
Try it Yourself » Did you notice the We set the brand attribute in Vehicle to a Why And When To Use "Inheritance"?- It is useful for code reusability: reuse attributes and methods of an existing class when you create a new class. Tip: Also take a look at the next chapter, Polymorphism, which uses inherited methods to perform different tasks. Inheritance allows us to define a class that inherits all the methods and properties from another class. Parent class is the class being inherited from, also called base class. Child class is the class that inherits from another class, also called derived class. Create a Parent ClassAny class can be a parent class, so the syntax is the same as creating any other class: ExampleCreate a class named class Person: def printname(self): #Use the Person class to create an object, and then execute the printname method: x = Person("John", "Doe") Create a Child ClassTo create a class that inherits the functionality from another class, send the parent class as a parameter when creating the child class: ExampleCreate a class named class Student(Person): Note: Use the Now the Student class has the same properties and methods as the Person class. ExampleUse the x = Student("Mike", "Olsen") Add the __init__() FunctionSo far we have created a child class that inherits the properties and methods from its parent. We want to add the Note: The ExampleAdd the class Student(Person): When you add the Note: The child's To keep the inheritance of the parent's Exampleclass Student(Person): Now we have successfully added the __init__() function, and kept the inheritance of the parent class, and we are ready to add functionality in the Use the super() FunctionPython also has a Exampleclass Student(Person): By using the Add PropertiesExampleAdd a property called class Student(Person): In the example below, the year ExampleAdd a class Student(Person): x = Student("Mike", "Olsen", 2019) Try it Yourself »Add MethodsExampleAdd a method called class Student(Person): def welcome(self): If you add a method in the child class with the same name as a function in the parent class, the inheritance of the parent method will be overridden. Test Yourself With ExercisesExercise:What is the correct syntax to create a class named Student that will inherit properties and methods from a class named Person? What is the name of a class inheriting properties of another class?The class which inherits the properties of other is known as subclass (derived class, child class) and the class whose properties are inherited is known as superclass (base class, parent class).
What is an inherited class called?An inherited class is called a subclass of its parent class or super class.
What does it mean when a class inherits from another class?Inheritance allows us to define a class that inherits all the methods and properties from another class. Parent class is the class being inherited from, also called base class. Child class is the class that inherits from another class, also called derived class.
|