Question

我试图为Scala和spark创建类似RStudio的体验。在确定如何在Win7x64上正确安装它（包括Scala 2.10.5）后，我面临问题，那就是解释器的版本

scala> scala.tools.nsc.Properties.versionString
res1: String = version 2.11.8

与spark-shell scala版本

不同

scala> scala.tools.nsc.Properties.versionString
res1: String = version 2.10.5

和scala版本（cmd.exe）

C:\>scala -version
Scala code runner version 2.10.5 -- Copyright 2002-2013, LAMP,EPFL

当从解释器启动spark时，根据callback hell问题导致我的问题

scala> val sc = new SparkContext(conf)
java.lang.NoSuchMethodError: scala.
collection.immutable.HashSet$.empty()Lscala/collection/immutable/HashSet;

问题：我在哪里设置/配置解释器使用的版本？搜索Scala IDE的全局设置以获得＆＃34;解释器＆＃34;没有结果。似乎是与Scala IDE一起发布的东西？

（spark 1.6.1，hadoop 2.6，Scala IDE 4.4.1，Scala 2.10.5，至少应该如此）

Answer 1

您可以随时使用scala和sbt console文件来启用正确的版本，而不是使用特定的build.sbt REPL安装。

如果您将build.sbt文件添加到主目录，Scala IDE应该选择您要使用的版本。

~/test2$ cat build.sbt
scalaVersion := "2.11.7"
~/test2$ sbt console
[info] Set current project to test2 (in build file:/projects/9ab40ff8-31cd-4860-9cc9-ceb67d1afa39/test2/)
[info] Updating {file:/projects/9ab40ff8-31cd-4860-9cc9-ceb67d1afa39/test2/}test2...
[info] Resolving jline#jline;2.12.1 ...
[info] Done updating.
[info] Starting scala interpreter...
[info]
Welcome to Scala version 2.11.7 (OpenJDK 64-Bit Server VM, Java 1.7.0_101).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :q

[success] Total time: 24 s, completed Jun 16, 2016 9:18:19 PM
~/test2$ echo 'scalaVersion := "2.10.5"' > build.sbt
~/test2$ cat build.sbt
scalaVersion := "2.10.5"
~/test2$ sbt console
[info] Set current project to test2 (in build file:/projects/9ab40ff8-31cd-4860-9cc9-ceb67d1afa39/test2/)
[info] Updating {file:/projects/9ab40ff8-31cd-4860-9cc9-ceb67d1afa39/test2/}test2...
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
[info] 'compiler-interface' not yet compiled for Scala 2.10.5. Compiling...
[info]   Compilation completed in 61.292 s
[info] Starting scala interpreter...
[info]
Welcome to Scala version 2.10.5 (OpenJDK 64-Bit Server VM, Java 1.7.0_101).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :q

[success] Total time: 77 s, completed Jun 16, 2016 9:20:45 PM

您还可以从https://www.googleapis.com:22230/等地点指定库依赖项，sbt将下载它们（如果尚未下载）并将它们添加到REPL类路径中。

最后，请查看mvnrepository以获取Scala的Ipython式笔记本界面。

Scala IDE：设置Scala解释器的版本

1 个答案: