golang-interface接口学习笔记

接口interface

1. 基本

type USB interface {
    Name() string
    Connect()
}

type PhoneConnector struct {
    name string
}

func (pc PhoneConnector)Name()string  {
    return pc.name
}

func (pc PhoneConnector)Connect(){
    fmt.Println("Connected:",pc.name)
}

func main()  {
    a := PhoneConnector{"PhoneConnector"}
    a.Connect()
    Disconnect(a)
}

func Disconnect(usb USB){
    // fmt.Println("Disconnected",usb.Name()) 一种办法

    //第二种办法，类型判断
    if pc, ok := usb.(PhoneConnector); ok {
        fmt.Println("Disconnected", pc.name)
        return
    }

    // type switch方法来判断类型
    switch v := usb.(type) {
    case PhoneConnector:
        fmt.Println("Disconnected", v.name)
    default:
        fmt.Println("Unknown device")
    }
}

1. 嵌入接口

type Connector interface {
    Connect()
}

type USB interface {
    Name() string
    Connector
}

type PhoneConnector struct {
    name string
}

func (pc PhoneConnector)Name()string  {
    return pc.name
}

func (pc PhoneConnector)Connect(){
    fmt.Println("Connected:",pc.name)
}

func main()  {
    a := PhoneConnector{"PhoneConnector"}
    a.Connect()
    Disconnect(a)
}

func Disconnect(usb USB){
    fmt.Println("Disconnected",usb.Name())
}