ubuntu20.04 自带scala 解释器scala 脚本问题
ubuntu20.04默认的scala 版本是2.11.12
$ scala
Welcome to Scala 2.11.12 (OpenJDK 64-Bit Server VM, Java 11.0.16).
Type in expressions for evaluation. Or try :help.
scala> println("hello,world");
hello,world
scala> ：quit
报错提示
$ scala hello.scala
error: Compile server encountered fatal condition: javax/tools/DiagnosticListener
java.lang.ClassNotFoundException: javax.tools.DiagnosticListener
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:476)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at scala.tools.util.PathResolverBase$Calculated$.javaBootClasspath(PathResolver.scala:277)
at scala.tools.util.PathResolverBase$Calculated$.basis(PathResolver.scala:283)
at scala.tools.util.PathResolverBase$Calculated$.containers$lzycompute(PathResolver.scala:293)
at scala.tools.util.PathResolverBase$Calculated$.containers(PathResolver.scala:293)
at scala.tools.util.PathResolverBase.containers(PathResolver.scala:309)
at scala.tools.util.PathResolver.computeResult(PathResolver.scala:341)
at scala.tools.util.PathResolver.computeResult(PathResolver.scala:332)
at scala.tools.util.PathResolverBase.result(PathResolver.scala:314)
at scala.tools.nsc.backend.JavaPlatform$class.classPath(JavaPlatform.scala:28)
at scala.tools.nsc.Global$GlobalPlatform.classPath(Global.scala:115)
at scala.tools.nsc.Global.scala$tools$nsc$Global$$recursiveClassPath(Global.scala:131)
at scala.tools.nsc.Global$GlobalMirror.rootLoader(Global.scala:64)
at scala.reflect.internal.Mirrors$Roots$RootClass.(Mirrors.scala:307)
at scala.reflect.internal.Mirrors$Roots.RootClass$lzycompute(Mirrors.scala:321)
at scala.reflect.internal.Mirrors$Roots.RootClass(Mirrors.scala:321)
at scala.reflect.internal.Mirrors$Roots$EmptyPackageClass.(Mirrors.scala:330)
at scala.reflect.internal.Mirrors$Roots.EmptyPackageClass$lzycompute(Mirrors.scala:336)
at scala.reflect.internal.Mirrors$Roots.EmptyPackageClass(Mirrors.scala:336)
at scala.reflect.internal.Mirrors$Roots.EmptyPackageClass(Mirrors.scala:276)
at scala.reflect.internal.Mirrors$RootsBase.init(Mirrors.scala:250)
at scala.tools.nsc.Global.rootMirror$lzycompute(Global.scala:73)
at scala.tools.nsc.Global.rootMirror(Global.scala:71)
at scala.tools.nsc.Global.rootMirror(Global.scala:39)
at scala.reflect.internal.Definitions$DefinitionsClass.ObjectClass$lzycompute(Definitions.scala:257)
at scala.reflect.internal.Definitions$DefinitionsClass.ObjectClass(Definitions.scala:257)
at scala.reflect.internal.Definitions$DefinitionsClass.init(Definitions.scala:1390)
at scala.tools.nsc.Global$Run.(Global.scala:1242)
at scala.tools.nsc.StandardCompileServer.session(CompileServer.scala:151)
at scala.tools.util.SocketServer$$anonfun$doSession$1$$anonfun$apply$1.apply(SocketServer.scala:74)
at scala.tools.util.SocketServer$$anonfun$doSession$1$$anonfun$apply$1.apply(SocketServer.scala:74)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withOut(Console.scala:65)
at scala.tools.util.SocketServer$$anonfun$doSession$1.apply(SocketServer.scala:74)
at scala.tools.util.SocketServer$$anonfun$doSession$1.apply(SocketServer.scala:69)
at scala.tools.nsc.io.Socket.applyReaderAndWriter(Socket.scala:49)
at scala.tools.util.SocketServer.doSession(SocketServer.scala:69)
at scala.tools.util.SocketServer.loop$1(SocketServer.scala:85)
at scala.tools.util.SocketServer.run(SocketServer.scala:97)
at scala.tools.nsc.CompileServer$$anonfun$execute$2$$anonfun$apply$mcZ$sp$1.apply$mcZ$sp(CompileServer.scala:218)
at scala.tools.nsc.CompileServer$$anonfun$execute$2$$anonfun$apply$mcZ$sp$1.apply(CompileServer.scala:213)
at scala.tools.nsc.CompileServer$$anonfun$execute$2$$anonfun$apply$mcZ$sp$1.apply(CompileServer.scala:213)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withOut(Console.scala:53)
at scala.tools.nsc.CompileServer$$anonfun$execute$2.apply$mcZ$sp(CompileServer.scala:213)
at scala.tools.nsc.CompileServer$$anonfun$execute$2.apply(CompileServer.scala:213)
at scala.tools.nsc.CompileServer$$anonfun$execute$2.apply(CompileServer.scala:213)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withErr(Console.scala:80)
at scala.tools.nsc.CompileServer$.execute(CompileServer.scala:212)
at scala.tools.nsc.CompileServer$.main(CompileServer.scala:180)
at scala.tools.nsc.CompileServer.main(CompileServer.scala)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at scala.reflect.internal.util.ScalaClassLoader$$anonfun$run$1.apply(ScalaClassLoader.scala:70)
at scala.reflect.internal.util.ScalaClassLoader$class.asContext(ScalaClassLoader.scala:31)
at scala.reflect.internal.util.ScalaClassLoader$URLClassLoader.asContext(ScalaClassLoader.scala:101)
at scala.reflect.internal.util.ScalaClassLoader$class.run(ScalaClassLoader.scala:70)
at scala.reflect.internal.util.ScalaClassLoader$URLClassLoader.run(ScalaClassLoader.scala:101)
at scala.tools.nsc.CommonRunner$class.run(ObjectRunner.scala:22)
at scala.tools.nsc.ObjectRunner$.run(ObjectRunner.scala:39)
at scala.tools.nsc.CommonRunner$class.runAndCatch(ObjectRunner.scala:29)
at scala.tools.nsc.ObjectRunner$.runAndCatch(ObjectRunner.scala:39)
at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala:65)
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)
$ scala
解决办法：
我有同样的问题,并通过升级到Scala 2.12.6修复它:
sudo apt remove scala-library scala
wget www.scala-lang.org/files/archive/scala-2.12.6.deb
sudo dpkg -i scala-2.12.6.deb