golang 面向对象

一 对象封装

package main

import "fmt"

type Phone0 struct {
	number  string
	color string
}
func (p Phone0) Dial() {
	fmt.Printf("Dail from %s ; color is %s
", p.number, p.color)
}

func (p *Phone0) Init(number string, color string) {
	p.number = number
	p.color = color
}

func main(){
	p := Phone0{}
	p.Init("187********", "white")
	p.Dial()

	p.color = "black"
	p.Dial()
}

　　

二 继承

package main

import "fmt"

type Phone1 struct {
    number string
}

func (p *Phone1) Init(number string) {
    p.number = number
}

func (p Phone1) Dial() {
    fmt.Printf("Dail from %s 
", p.number)
}

type Xiaomi struct {
    Phone1
    dtype string
}

func (x *Xiaomi) Init(number string, dtype string) {
    x.Phone1.Init(number)
    x.dtype = dtype
}

func (x Xiaomi) DialXiaomi() {
    fmt.Printf("Dail from %s, type is %s 
", x.number, x.dtype)
}


func main() {
    p := Phone1{}
    p.Init("135********")
    p.Dial()

    e := Xiaomi{}
    e.Init("138********", "xiaomi")
    e.Dial()
    e.DialXiaomi()
}

三 多态

package main

import "fmt"

type PhoneIf interface {
    Dial()
    Feature()
}

type Apple struct {
    apple_feature string
}

func (apple *Apple) Dial() {
    fmt.Println("Dial from Iphone")
}

func (apple *Apple) Feature() {
    fmt.Println("Iphone feature")
}

type Huawei struct {
    huawei_feature string
}

func (huawei *Huawei) Dial() {
    fmt.Println("Dial from Huawei")
}

func (huawei *Huawei) Feature() {
    fmt.Println("Huawei feature")
}

func main() {
    var phone PhoneIf

    phone = &Apple{}
    phone.Dial()
    phone.Feature()

    phone = &Huawei{}
    phone.Dial()
    phone.Feature()

    phone2 := &Huawei{}
    phone2.Dial()
    phone2.Feature()
}

四 补充说明

• go中的public就是名称首字母大小写，大写为public，假如一中的 p.color = "black" 用在不同的包将出错， 此时需要将coler改成Color
• 二和三中的 func内 struct和 interface 用* 和不用* 都行， 一般要操作成员变量的时候，用* 更妥，更有效读取和变更成员变量的值