package main

 import (

     "fmt"

     "time"

 )

 func main() {

     time.AfterFunc(time.Millisecond*, after_func)

     fmt.Println("Now, time.After 1 second")

     ac := time.After(time.Second)  //每次调用都会重新计时

     <-ac

     timer := time.NewTimer(time.Millisecond * )

     go func() {

         <-timer.C

         fmt.Println("...")

     }()

     timer.Stop()

     fmt.Println("timer stop")

     ticker := time.NewTicker(time.Millisecond * )

     go func() {

         for range ticker.C {

             fmt.Println("ticker arrive")

         }

     }()

     fmt.Println("Now, sleep 600 Milliseconds")

     time.Sleep(time.Millisecond * )

     ticker.Stop()

 }

 func after_func() {

     fmt.Println("I'm an after function")

 }