On Saturday, October 8, 2016 at 9:14:34 PM UTC+8, Fei Ding wrote:
>
> Recently I've been asked a question which is, what's the difference
> between Golang and Java about *interface*?
>
>
> I know there are some 'syntax-sugar level' differences, what I am
> interested is anything beneath the ground, like how does Golang and Java
> implement interface? What's the biggest difference? Which one is more
> efficient? Why?
>
>
> Could anyone post blog links or source code about this topic? The only
> code I can find is in src/runtime/iface.go, but I cannot understand it or
> get anything useful by myself yet. Source code is better.
>
>
> Thanks.
>
In golang, you can convert one interface value to another interface value:
ackage main
import "fmt"
type I0 interface {
IsZero() bool
}
type I1 interface {
IsOne() bool
}
type T int
func (t T) IsZero() bool {
return t == 0
}
func (t T) IsOne() bool {
return t == 1
}
func main(){
var i0 I0 = T(1)
var i1 = i0.(I1)
fmt.Println(i1.IsOne())
}
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