英文:
How to run scala repl with java 11?
问题
我已经在我的Ubuntu 20.04上安装了Java 11；
Java版本：
$ java -version
openjdk version "11.0.8" 2020-07-14
OpenJDK Runtime Environment (build 11.0.8+10-post-Ubuntu-0ubuntu120.04)
OpenJDK 64-Bit Server VM (build 11.0.8+10-post-Ubuntu-0ubuntu120.04, mixed mode, sharing)
Scala版本：
$ scala -version
Scala代码运行器版本 2.11.12 -- 版权所有 2002-2017，LAMP/EPFL
当我尝试运行Scala REPL时，我遇到了以下错误：
欢迎使用Scala 2.11.12 (OpenJDK 64-Bit Server VM，Java 11.0.8)。
键入表达式进行评估。或尝试 :help。
主线程中的异常 "main" java.lang.NoClassDefFoundError: javax/script/Compilable
at scala.tools.nsc.interpreter.ILoop.createInterpreter(ILoop.scala:118)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1$$anonfun$startup$1$1$$anonfun$apply$1.apply(ILoop.scala:971)
...
如果我尝试使用Java 8运行（使用update-alternatives --config java更改版本），它可以正常工作：
REPL：
$ scala
cat: /usr/lib/jvm/java-8-openjdk-amd64/jre/release: 文件或目录不存在
欢迎使用Scala 2.11.12 (OpenJDK 64-Bit Server VM，Java 1.8.0_265)。
键入表达式进行评估。或尝试 :help。
如何让Scala REPL在Java 11中正常工作？我还每次在切换Java 8和11之间时更改了我的.zshrc文件中的JAVA_HOME。
英文:
I've installed java 11 on my ubuntu 20.04;
The java version:
$ java -version
penjdk version "11.0.8" 2020-07-14
OpenJDK Runtime Environment (build 11.0.8+10-post-Ubuntu-0ubuntu120.04)
OpenJDK 64-Bit Server VM (build 11.0.8+10-post-Ubuntu-0ubuntu120.04, mixed mode, sharing)
The scala version:
$ scala -version
Scala code runner version 2.11.12 -- Copyright 2002-2017, LAMP/EPFL
When i try to run the scala repl i got the error:
Welcome to Scala 2.11.12 (OpenJDK 64-Bit Server VM, Java 11.0.8).
Type in expressions for evaluation. Or try :help.
Exception in thread "main" java.lang.NoClassDefFoundError: javax/script/Compilable
at scala.tools.nsc.interpreter.ILoop.createInterpreter(ILoop.scala:118)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1$$anonfun$startup$1$1$$anonfun$apply$1.apply(ILoop.scala:971)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1$$anonfun$startup$1$1$$anonfun$apply$1.apply(ILoop.scala:971)
scala> at scala.tools.nsc.interpreter.ILoop.savingReader(ILoop.scala:96)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1$$anonfun$startup$1$1.apply(ILoop.scala:970)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:990)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:891)
at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:891)
at scala.reflect.internal.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:97)
at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:891)
at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala:74)
at scala.tools.nsc.MainGenericRunner.run$1(MainGenericRunner.scala:87)
at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:98)
at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:103)
at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)
[ERROR] Failed to disable litteral next character
java.lang.InterruptedException
at java.base/java.lang.Object.wait(Native Method)
at java.base/java.lang.Object.wait(Object.java:328)
at java.base/java.lang.ProcessImpl.waitFor(ProcessImpl.java:495)
at jline.internal.TerminalLineSettings.waitAndCapture(TerminalLineSettings.java:339)
at jline.internal.TerminalLineSettings.exec(TerminalLineSettings.java:311)
at jline.internal.TerminalLineSettings.stty(TerminalLineSettings.java:282)
at jline.internal.TerminalLineSettings.undef(TerminalLineSettings.java:158)
at jline.UnixTerminal.disableLitteralNextCharacter(UnixTerminal.java:194)
at jline.console.ConsoleReader.readLine(ConsoleReader.java:2450)
at jline.console.ConsoleReader.readLine(ConsoleReader.java:2373)
at jline.console.ConsoleReader.readLine(ConsoleReader.java:2361)
at scala.tools.nsc.interpreter.jline.InteractiveReader.readOneLine(JLineReader.scala:59)
at scala.tools.nsc.interpreter.InteractiveReader$class.readLine(InteractiveReader.scala:38)
at scala.tools.nsc.interpreter.jline.InteractiveReader.readLine(JLineReader.scala:27)
at scala.tools.nsc.interpreter.SplashReader.readLine(InteractiveReader.scala:142)
at scala.tools.nsc.interpreter.SplashLoop.run(InteractiveReader.scala:71)
at java.base/java.lang.Thread.run(Thread.java:834)
If i try to run using java8 (changing the version using update-alternatives --config java) it works:
Repl:
$ scala
cat: /usr/lib/jvm/java-8-openjdk-amd64/jre/release: Arquivo ou diretório não encontrado
Welcome to Scala 2.11.12 (OpenJDK 64-Bit Server VM, Java 1.8.0_265).
Type in expressions for evaluation. Or try :help.
scala>
How can i get scala repl to work along java 11? i've also changed the JAVA_HOME on my .zshrc file everytime i change between java8 and 11.
答案1
得分: 4
Scala 2.11.12 应当与 JDK 11 兼容，参见 版本兼容性表
## 版本兼容性表
| JDK 版本 | 最低 Scala 版本 | 推荐 Scala 版本 |
|:----------:|:-------------------------------|:---------------------------------------------------------|
| 13, 14 | 2.13.2, 2.12.11 | 2.13.3, 2.12.12 |
| 12 | 2.13.1, 2.12.9 | 2.13.3, 2.12.12 |
| 11 | 2.13.0, 2.12.4, 2.11.12 | 2.13.3, 2.12.12, 2.11.12 |
| 8 | 2.13.0, 2.12.0, 2.11.0, 2.10.2 | 2.13.3, 2.12.12, 2.11.12, 2.10.7 |
| 6, 7 | 2.11.0, 2.10.0 | 2.11.12, 2.10.7 |
在我的机器上执行
scala --scala-version 2.11.12 -C--jvm=11
使用 scala-runners 没有报错
➜ ~ scala --scala-version 2.11.12 -C--jvm=11
欢迎使用 Scala 2.11.12 (OpenJDK 64-Bit Server VM, Java 11.0.7)。
输入表达式以进行评估。或者尝试使用 :help。
scala> sys.props("java.specification.version")
res0: String = 11
scala> util.Properties.versionString
res1: String = version 2.11.12
scala>
注意 -C--jvm=11 参数指定了由 coursier 下载的 JDK 版本。
英文:
Scala 2.11.12 should be compatible with JDK 11 according to Version compatibility table
## Version compatibility table
| JDK version | Minimum Scala versions | Recommended Scala versions |
|:-----------:|:---------------------------------|:-----------------------------------------------------------|
| 13, 14 | 2.13.2, 2.12.11 | 2.13.3, 2.12.12 |
| 12 | 2.13.1, 2.12.9 | 2.13.3, 2.12.12 |
| 11 | 2.13.0, 2.12.4, 2.11.12 | 2.13.3, 2.12.12, 2.11.12 |
| 8 | 2.13.0, 2.12.0, 2.11.0, 2.10.2 | 2.13.3, 2.12.12, 2.11.12, 2.10.7 |
| 6, 7 | 2.11.0, 2.10.0 | 2.11.12, 2.10.7 |
On my machine executing
scala --scala-version 2.11.12 -C--jvm=11
with scala-runners gives no error
➜ ~ scala --scala-version 2.11.12 -C--jvm=11
Welcome to Scala 2.11.12 (OpenJDK 64-Bit Server VM, Java 11.0.7).
Type in expressions for evaluation. Or try :help.
scala> sys.props("java.specification.version")
res0: String = 11
scala> util.Properties.versionString
res1: String = version 2.11.12
scala>
Note the -C--jvm=11 argument specifies JDK version which is downloaded by coursier.
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