I'm trying to uninstall scala so I can redownload an older version for compatibility reasons. I thought I had done it but whenever I run scala, it still runs the latest version, the one I thought I had uninstalled. This is the code I've been running in my terminal, I'm on a macbook also, anymore info needed lmk, any help is much appreciated!
➜ ~ scala
Welcome to Scala 3.2.0 (18.0.2.1, Java Java HotSpot(TM) 64-Bit Server VM).
Type in expressions for evaluation. Or try :help.
scala> :q
➜ ~ brew list scala
Error: No such keg: /usr/local/Cellar/scala
➜ ~ brew uninstall scala
Error: No such keg: /usr/local/Cellar/scala
Related
On Ubuntu 16.04, I installed scala:
$ls ~/Binary/scala-2.11.8
bin doc lib man
$grep -A 2 SCALA ~/.bashrc
SCALA=~/Binary/scala-2.11.8
SBT=~/Binary/sbt
export PATH=$PATH:$SCALA/bin:$SBT/bin
With openjdk8 installed, scala fails when opening the REPL:
$javac -version
javac 1.8.0_91
$
$scala
Welcome to Scala 2.11.8 (OpenJDK 64-Bit Server VM, Java 9-internal).
Type in expressions for evaluation. Or try :help.
scala>
Failed to initialize compiler: object java.lang.Object in compiler mirror not found.
** Note that as of 2.8 scala does not assume use of the java classpath.
** For the old behavior pass -usejavacp to scala, or if using a Settings
** object programmatically, settings.usejavacp.value = true.
Failed to initialize compiler: object java.lang.Object in compiler mirror not found.
** Note that as of 2.8 scala does not assume use of the java classpath.
** For the old behavior pass -usejavacp to scala, or if using a Settings
** object programmatically, settings.usejavacp.value = true.
How can I resolve it?
Using the Java 8 version of OpenJDK resolved this issue for me.
sudo update-alternatives --config java
sudo update-alternatives --config javac
Java 8 is deprecated, so downgrading to is must NOT be an acceptable solution.
The correct solution is to upgrade your SBT to 0.13.17 or higher.
This issue appears to be with Java 9 and gets solved with Java 8.
If you have Java 8 and Java 9, and you would like to keep both, you can set your environment variable JAVA_HOME to the Java 8 path.
For example:
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home
You will need to replace jdk1.8.0_161.jdk with whichever version of the JDK that you have.
You can find that version with:
ls /Library/Java/JavaVirtualMachines/
Once you set that environment variable, you can open a new terminal and run java -version to see if the version was set correctly.
EDIT:
It may be worth noting that I have a Mac even though this is a linux question.
Installing java version "1.8.0_144" resolved the issue for me. I had installed jdk 1.9 previously.
If you're using an older version of Scala that is not compatible with JDK greater than 8, update to a newer version that's compatible with JDK 11. JDK 11 is current the LTS.
Versions by minor version:
For 2.11.x this means 2.11.12 or later
For 2.12.x this means 2.12.10 or later
For 2.13.x this means 2.13.1 or later
As other answers mentioned, make sure you're also using a build tool that's compatible with JDK >8 (e.g. sbt greater than 0.13.17).
Installing Java 8 resolved this issue.
I downloaded java 8 and i extracted that to the following location : /usr/lib/jvm/jdk1.8.0_172
After doing this update the JAVA_HOME path to the same : /usr/lib/jvm/jdk1.8.0_172
This will resolve the issue.
Worked with this java version "1.8.0_144"
Uninstall java and apache-spark
install java, install apache-spark
I ran into the same issue. Uninstall Java 9
sudo rm -fr /Library/Java/JavaVirtualMachines/jdk-9.jdk/
sudo rm -fr /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
sudo rm -fr /Library/PreferencePanes/JavaControlPanel.prefPane
Ref: https://gist.github.com/schnell18/bcb9833f725be22f6acd01f94b486392
Install Java 8.
Everything seems to good now.
Btw: this was for mac. Might be useful for you.
i had a zip of my jdk at the same location. Removing the zip did the trick for me.
I'd like to install the latest version of Scala => version 2.12.0-M5 on my mac using homebrew. Is it possible?
When I run command this is what I get
brew install scala
Warning: scala-2.11.6 already installed
$ brew remove scala
$ brew install scala --devel
https://gist.github.com/dimetron/4340744
This might solve your problem Thanks !
I currently had installed scala 2.11.7 but in order to fix this issue, I have to install a older version of scala(2.10.5). When I try to install with brew, I keep getting the following error
Error: No available formula for 2.10.5
I tried downloading the binaries for scala download page but when I load the SDK and all the libraries in IntelliJ, I just get this error
Error:scalac: No 'scala-library*.jar' in Scala compiler classpath in Scala SDK scala-sdk-2.10.5
So what is the right way to install an older version of scala and setting the same in intellij
The following should work for Homebrew 0.9.5:
Install Tapped version of Scala 2.10
brew install homebrew/versions/scala210
Unlink version of Scala 2.11 (if installed)
brew unlink scala
Link Tapped version of Scala 2.10
brew link scala210 --force
Check scala version
scala -version
brew search scala
then you will find all the available versions like below
scala scala#2.10 scala#2.11 scalaenv scalariform scalastyle
homebrew/science/scalapack Caskroom/cask/scala-ide
Then choose whichever version you want to install. say if you want to install scala 2.11 then you can do that by runnig the command like below
brew install scala#2.11
If you manage your project with sbt, the scala built tool, either directly or via IntelliJ, the version of scala for that code is defined in the build file (build.sbt or Build.scala):
scalaVersion := "2.10.5"
Choosing this path, there isn't even a need to install scala on your Mac at all. Each project will have its own version -- pulled from your local ivy repository, so it doesn't have to download it each time.
And rather than typing scala to get to the REPL, you type sbt console to get to the REPL with the project's scala version and dependencies loaded.
Homebrew installs scala 2.10.5 with the formula scala210:
$ brew install scala210
==> Installing scala210 from homebrew/homebrew-versions
==> Downloading https://homebrew.bintray.com/bottles/scala210-2.10.5.yosemite.bottle.tar.gz
==> Downloading http://www.scala-lang.org/files/archive/scala-2.10.5.tgz
######################################################################## 100,0%
However, if you are using a build tool like maven or sbt, you should be able to set another scala version in your build config. You should then be able to import your project into IntelliJ and IntelliJ should automatically use the dependencies defined in your build config.
Using brew to install specific version:
$ brew search scala
==> Formulae
scala scala#2.10 scala#2.11 scalaenv
scalapack scalariform scalastyle
==> Casks
scala-ide
Make sure you default version in profile
$echo 'export PATH="/usr/local/opt/scala#2.11/bin:$PATH"' >> ~/.bash_profile
Noob question incoming.
I just uninstalled scala 2.9.2 from my machine in doing:
sudo apt-get remove scala
While the command:
scala -version
outputs:
The program 'scala' is currently not installed. You can install it by typing: sudo apt-get install scala
My scala/sbt program still functions...
Why? I do not know.
I would like to install the latest version of scala which is the 2.11.7.
My questions are:
- How do I fully uninstall scala?
- How do I install scala 2.11.7? (In which directory uncompress the .tgz? What bindings?)
SBT is not scala
the command sbt usually is a wrapper script that launches sbt-launch.jar in [home]/.sbt/launchers. Where that wrapper script is installed to heavily depends on how you installed it.
SBT downloads its own scala version into a projects target path. It is totally local, so imo there is not reason to worry about installation relics.
Thus, if you want to use scala 2.11.7, just set scalaVersion := 2.11.7 in your build.sbt
It seems as if my scala installation does not contain a rather fundamental package, scala.language:
scala> import language._
<console>:7: error: not found: value language
import language._
^
scala> import scala.language._
<console>:7: error: object language is not a member of package scala
import scala.language._
I've re-installed scala from my Linux repositores (I'm running LMDE 2 "Betsy"), yet I've had no luck. It is unclear to me how exactly I can just download the respective jar, place it somewhere in my system and have the import work.
Here are specs about my system and java/scala installation that might be of use:
jasonfil#hp ~ $ cat /etc/debian_version
8.1
jasonfil#hp ~ $ uname -r
3.16.0-4-amd64
jasonfil#hp ~ $ scala -version
Scala code runner version 2.9.2 -- Copyright 2002-2011, LAMP/EPFL
jasonfil#hp ~ $ java -version
java version "1.7.0_79"
OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-1~deb8u1)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)
jasonfil#hp ~ $ echo $CLASSPATH
/home/jasonfil/AtomicScala/examples:/usr/share/java
Indeed, as #ymonad said, this appeared to be a question of trusting the language's source more than the Debian repo version. Marking this solved. Thanks.