Basic principles and implementation methods of Golang inheritance methods
In Golang, inheritance is one of the important features of object-oriented programming. Through inheritance, we can use the properties and methods of the parent class to achieve code reuse and extensibility. This article will introduce the basic principles and implementation methods of Golang inheritance methods, and provide specific code examples.
2.1 Combination method
Composition means embedding a parent class structure in a subclass, and inheriting it by calling the parent class's method in the subclass. The following is a sample code that uses combination to implement inheritance methods:
type Parent struct { name string } func (p *Parent) SayHello() { fmt.Println("Hello, I'm", p.name) } type Child struct { Parent } func main() { child := Child{Parent{name: "John"}} child.SayHello() // 调用父类的SayHello方法 }
In the above code, Parent and Child represent the parent class and child class respectively. The Parent structure is embedded in the Child structure, thereby inheriting the Parent's properties and methods. By directly calling the Parent method, the subclass can realize the use of the parent class method.
2.2 Anonymous field method
Anonymous field refers to embedding a parent class structure in a subclass, and the subclass can directly access the properties and methods of the parent class without passing the name of the parent class. The following is a sample code that uses anonymous fields to implement inheritance methods:
type Parent struct { name string } func (p *Parent) SayHello() { fmt.Println("Hello, I'm", p.name) } type Child struct { Parent // 匿名字段 } func main() { child := Child{Parent{name: "John"}} child.SayHello() // 子类直接调用父类方法 }
In the above code, by embedding the Parent structure in the Child structure and not specifying the field name, the subclass can call it directly Methods of the parent class.
type Parent struct { name string } func (p *Parent) SayHello() { fmt.Println("Hello, I'm", p.name) } type Child struct { Parent } func (c *Child) SayHello() { fmt.Println("Hi, I'm", c.name) } func main() { child := Child{Parent{name: "John"}} child.SayHello() // 调用子类的SayHello方法 }
In the above code, the Child structure overrides the SayHello method in the Parent structure. When a subclass calls the SayHello method, the overridden method in the subclass will be called instead of the method in the parent class.
The inheritance method is one of the important features in Golang object-oriented programming. Through inheritance, code reuse and scalability can be achieved. This article introduces the basic principles and implementation methods of Golang's inheritance method, and provides specific code examples. I hope that readers can better understand and apply the inheritance method in Golang through the introduction of this article.
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