未來不是scala的成員。併發

Question

導入Future類時出現錯誤Future is not a member of scala.concurrent。

~/workspace/experiments $ scala 
Welcome to Scala version 2.9.2 (OpenJDK 64-Bit Server VM, Java 1.7.0_151). 
Type in expressions to have them evaluated. 
Type :help for more information. 

scala> import scala.concurrent.Future 
<console>:7: error: Future is not a member of scala.concurrent 
     import scala.concurrent.Future 
      ^

scala> 

我上Unbuntu 14.04運行以下命令：

~/workspace/experiments $ cat /etc/lsb-release             
DISTRIB_ID=Ubuntu 
DISTRIB_RELEASE=14.04 
DISTRIB_CODENAME=trusty 
DISTRIB_DESCRIPTION="Ubuntu 14.04.5 LTS" 

任何一個人知道我做錯了嗎？

Answer 1

升級您的Scala版本應該可以解決它。不會出現，未來是Scala 2.9.2 scala.concurrent的成員見 http://www.scala-lang.org/api/2.9.2/#scala.concurrent.package

與http://www.scala-lang.org/api/2.11.8/#scala.concurrent.package