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Topic: Inheritance in Java
Inheritance is a fundamental concept in object-oriented programming (OOP) languages like Java. It allows a class to inherit properties and behaviors from another class, known as the superclass or parent class. This enables code reuse and promotes the concept of code organization and hierarchy.
Example
Let's consider a simple example to illustrate inheritance in Java. Suppose we have a superclass called
Vehicle
, which has properties like color
, brand
, and methods like startEngine()
and stopEngine()
. Now, let's say we want to create a subclass called Car
that inherits these properties and methods from the Vehicle
class.In this example, the
Car
class inherits the color
and brand
properties, as well as the startEngine()
and stopEngine()
methods from the Vehicle
class. This allows us to create instances of the Car
class and access these inherited properties and methods.Exercise
Now, let's try an exercise to reinforce our understanding of inheritance in Java.
- Create a superclass called
Animal
with properties likename
andage
, and methods likeeat()
andsleep()
.
- Create a subclass called
Cat
that inherits the properties and methods from theAnimal
class.
- Add additional properties and methods specific to the
Cat
class, such asmeow()
andplay()
.
- Create an instance of the
Cat
class and test out the inherited and subclass-specific properties and methods.
Resources
Here are some additional resources to learn more about inheritance in Java:
- 作者:现代数学启蒙
- 链接:https://www.math1234567.com/article/csa002
- 声明:本文采用 CC BY-NC-SA 4.0 许可协议,转载请注明出处。
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