Golang time.Sleep()用法及示例讲解

func Sleep(d Duration)

// Golang program to illustrate the usage of 
// Sleep() function 
  
// Including main package 
package main 
  
// Importing fmt and time 
import ( 
    "fmt"
    "time"
) 
  
// Main function 
func main() { 
  
    // Calling Sleep method 
    time.Sleep(8 * time.Second) 
  
    // Printed after sleep is over 
    fmt.Println("Sleep Over.....") 
}

// Golang program to illustrate the usage of 
// Sleep() function 
  
// Including main package 
package main 
  
// Importing time and fmt 
import ( 
    "fmt"
    "time"
) 
  
// Main function 
func main() { 
  
    // Creating channel using 
    // make keyword 
    mychan1:= make(chan string, 2) 
  
    // Calling Sleep function of go 
    go func() { 
        time.Sleep(2 * time.Second) 
  
        // Displayed after sleep overs 
        mychan1 <- "output1"
    }() 
  
    // Select statement 
    select { 
  
    // Case statement 
    case out:= <-mychan1:
        fmt.Println(out) 
  
    // Calling After method 
    case <-time.After(3 * time.Second):
        fmt.Println("timeout....1") 
    } 
  
    // Again Creating channel using 
    // make keyword 
    mychan2:= make(chan string, 2) 
  
    // Calling Sleep method of go 
    go func() { 
        time.Sleep(6 * time.Second) 
  
        // Printed after sleep overs 
        mychan2 <- "output2"
    }() 
  
    // Select statement 
    select { 
  
    // Case statement 
    case out:= <-mychan2:
        fmt.Println(out) 
  
    // Calling After method 
    case <-time.After(3 * time.Second):
        fmt.Println("timeout....2") 
    } 
}