You cannot use a different major version of Scala (2.9, 2.10) than your
'NetLogo.jar' was built against. If you're using the 'NetLogo.jar' that
comes with the standard distribution of NetLogo that you get from the
NetLogo website, it runs with Scala 2.9, and your program should also be
built against 2.9 and load up a 2.9 version of the Scala standard
library when it runs. If you're using a 'NetLogo.jar' that was built
using a recent snapshot of NetLogo's 'master' or 'headless' branches,
you'll want to use a 2.10 version of Scala.
My guess is that you're probably depending on the 'NetLogo.jar' from the
NetLogo distribution, so you'd then want a 2.9 version of Scala. I
don't use Scala IDE, so I don't know the specifics of making the errors
go away in your IDE, but, in IntelliJ, it would consist of adding Scala
2.9 as a global library, setting the compiler in the Scala facet for the
project to use that Scala 2.9 global library, and also adding that Scala
2.9 library to the project's classpath. I imagine that the Scala IDE
steps are similar. You just have to make the language version settings
all line up.
Jason Bertsche
Senior Software Developer - NetLogo
On 12/28/2013 03:24 PM, Robert White wrote:
I am using Scala Eclipse IDE and I get the following errors while
running the code at:
https://github.com/NetLogo/NetLogo/wiki/Controlling-API
I searched online. It seems that is caused by version 2.9.x is not
comparable with 2.10.x?
Do any other people get the same errors? If I remove the Scala library
and use the library provided by Netlogo then the IDE would report
errors. So I am really running into a bit problem that I can't solve
the problem either way.
Thanks very much!
Robert ;)
//--------the following is the error message ------
Exception in thread "main" java.lang.NoClassDefFoundError:
scala/reflect/ClassManifest
at org.nlogo.api.Version$.<init>(Version.scala:15)
at org.nlogo.api.Version$.<clinit>(Version.scala)
at
org.nlogo.headless.HeadlessWorkspace$.newInstance(HeadlessWorkspace.scala:38)
at
org.nlogo.headless.HeadlessWorkspace$.newInstance(HeadlessWorkspace.scala:31)
at Example2$.main(Example.scala:26)
at Example2.main(Example.scala)
Caused by: java.lang.ClassNotFoundException: scala.reflect.ClassManifest
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
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