CODEWITHSUNDEEP
sbt
Alfred Zien
Alfred Zien

Reputation: 1044

How can I update sbt in project?

I'm going through course on Coursera about scala, and they have assignments for me to do. I downloaded project and there is build.sbt in it. I tried with sbt command in terminal, Eclipse and Idea, nothing works. Message in terminal says: 

[info] Compiling 8 Scala sources to /Users/(Path to project)/project/target/scala-2.9.2/sbt-0.12/classes...
[error] error while loading CharSequence, class file '/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/rt.jar(java/lang/CharSequence.class)' is broken
[error] (bad constant pool tag 18 at byte 10)
[error] error while loading Comparator, class file '/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/rt.jar(java/util/Comparator.class)' is broken
[error] (bad constant pool tag 18 at byte 20)
[error] error while loading AnnotatedElement, class file '/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/rt.jar(java/lang/reflect/AnnotatedElement.class)' is broken
[error] (bad constant pool tag 18 at byte 76)
[error] /Users/(Path to project)/project/ScalaTestRunner.scala:66: overloaded method value replace with alternatives:
[error]   (java.lang.CharSequence,java.lang.CharSequence)java.lang.String <and>
[error]   (Char,Char)java.lang.String
[error]  cannot be applied to (java.lang.String, java.lang.String)
[error]   private def runPathString(file: File) = file.getAbsolutePath().replace(" ", "\\ ")
[error]                                                                  ^
[error] four errors found
[error] (compile:compile) Compilation failed

As I understand sbt 0.12 using scala 2.9.2, that doesn't handle Java 1.8 correctly. Of course, downgrading java works, but it's not a solution, because I need Java 1.8. I have installed latest sbt and scala, but I think this project has his own sbt, or something. So, what I need is upgrade sbt or downgrade java specifically for this project. Second is more preferred, because I'm afraid upgrading sbt can result my work to fail on their servers. I'm a very newbee at this so, if I said something very stupid, sorry.

Upvotes: 1

Views: 1635

Answers (4)

prosseek
prosseek

Reputation: 190759

Another directory you might need to look into is the project directory. There you may find build.properites file that specifies the version of sbt and Scala. When it has older version that does not work well with the newer Java installation, you can have the error messages.

Upvotes: 1

Alfred Zien
Alfred Zien

Reputation: 1044

May be it will help somebody, you can also add scalaVersion := "2.11.6" to your build.sbt. Not tested by me, but it is stated in official doc here.

Upvotes: 0

Dale Wijnand
Dale Wijnand

Reputation: 6102

Another way to get sbt to use a different version of Java is to create a .sbtopts file at the root of the project containing:

-java-home
/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home

for whatever your Java 7 version is. Note: must be on separate lines.

Upvotes: 1

Alfred Zien
Alfred Zien

Reputation: 1044

Heh, that what was actually very easy, if you know what to do. Just create .javaversion file in project directory (or above, as I understand, it searches first in dirs tree) and fill it with oracle64-1.7.0.76, or any you want. Also, there is nice plugin to make it even more easy.

Upvotes: 0

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