import scala.actors.Actor
在pom.xml中添加scala.actors依赖,然后更新
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-actors</artifactId>
<version>2.10.7</version>
</dependency>
资料:
https://stackoverflow.com/questions/32433561/cant-import-scala-actors-actor-in-intellij-scala-plugin