Why do I get `java.lang.NoClassDefFoundError: scala/Function1` when I run my code in ScalaIDE?
43,497
Solution 1
adding the Scala dependency to the maven build can fix the issue :
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.10.3</version>
</dependency>
Solution 2
As for me, in the configuration of "Run/Debug configurations" [idealJ]
remember to choose the "Include dependencies with "Provided" scope"
Comments
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blue-sky about 4 years
Here is a simple test I'm using to invoke a Scala method from Java:
public static void main(String args[]) { java.util.Map<String, java.util.List<String>> rec = news.recommend.DriverObj.runTest(); System.out.println(rec.toString()); }
Here is the definition of the Scala method:
def runTest: java.util.Map[String, java.util.List[String]] = { new java.util.HashMap[String, java.util.List[String]] }
But it throws an error:
Exception in thread "main" java.lang.NoClassDefFoundError: scala/Function1 at news.recommend.DriverObj.runTest(DriverObj.scala)
What should I do to make this running smoothly?
Update : I'm running it via Eclipse and my build path contains :
So Scala library should be found ?
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febot about 6 yearsDidn't help for me. I am running through Gatling. Looks like Gatling controls its classpath differently.
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lallantop over 4 yearsWorked for me. Thanks!
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lallantop over 4 yearsI already had this dependency listed and was still having the issue. The solution from @Kuang Wenyi worked for me.
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Filip almost 3 yearsWorked for me also, but why?
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Kuang Wenyi almost 3 years@Filip I believe there is some issue between the IdeaJ and maven.