Getting Started with Eclipse and Counterclockwise

I am totally new with clojure and eclipse. I have done the installation and running helloworld.clj I am getting all these errors. What am I doing wrong ??

Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: java.lang.IllegalArgumentException: Don't know how to create ISeq from: clojure.lang.Symbol (helloworld.clj:0)
at clojure.lang.Compiler.eval(Compiler.java:5440)
at clojure.lang.Compiler.load(Compiler.java:5857)
at clojure.lang.RT.loadResourceScript(RT.java:340)
at clojure.lang.RT.loadResourceScript(RT.java:327)
at clojure.lang.RT.loadResourceScript(RT.java:319)
at clojure.main$load_script.invoke(main.clj:220)
at clojure.main$init_opt.invoke(main.clj:226)
at clojure.main$initialize.invoke(main.clj:254)
at clojure.main$null_opt.invoke(main.clj:279)
at clojure.main$main.doInvoke(main.clj:354)
at clojure.lang.RestFn.invoke(RestFn.java:513)
at clojure.lang.Var.invoke(Var.java:385)
at clojure.lang.AFn.applyToHelper(AFn.java:187)
at clojure.lang.Var.applyTo(Var.java:482)
at clojure.main.main(main.java:37)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.IllegalArgumentException: Don't know how to create ISeq from: clojure.lang.Symbol
at clojure.lang.LazySeq.sval(LazySeq.java:47)
at clojure.lang.LazySeq.seq(LazySeq.java:56)
at clojure.lang.RT.seq(RT.java:450)
at clojure.core$seq.invoke(core.clj:122)
at clojure.core$assert_valid_fdecl.invoke(core.clj:5711)
at clojure.core$sigs.invoke(core.clj:201)
at clojure.core$defn.doInvoke(core.clj:272)
at clojure.lang.RestFn.invoke(RestFn.java:495)
at clojure.lang.Var.invoke(Var.java:381)
at clojure.lang.AFn.applyToHelper(AFn.java:180)
at clojure.lang.Var.applyTo(Var.java:482)
at clojure.lang.Compiler.macroexpand1(Compiler.java:5286)
at clojure.lang.Compiler.macroexpand(Compiler.java:5341)
at clojure.lang.Compiler.eval(Compiler.java:5409)
... 14 more
Caused by: java.lang.RuntimeException: java.lang.IllegalArgumentException: Don't know how to create ISeq from: clojure.lang.Symbol
at clojure.lang.LazySeq.sval(LazySeq.java:47)
at clojure.lang.LazySeq.seq(LazySeq.java:56)
at clojure.lang.RT.seq(RT.java:450)
at clojure.core$seq.invoke(core.clj:122)
at clojure.core$filter$fn__3714.invoke(core.clj:2130)
at clojure.lang.LazySeq.sval(LazySeq.java:42)
... 27 more
Caused by: java.lang.IllegalArgumentException: Don't know how to create ISeq from: clojure.lang.Symbol
at clojure.lang.RT.seqFrom(RT.java:471)
at clojure.lang.RT.seq(RT.java:452)
at clojure.lang.RT.first(RT.java:540)
at clojure.core$first.invoke(core.clj:53)
at clojure.core$map$fn__3695.invoke(core.clj:2096)
at clojure.lang.LazySeq.sval(LazySeq.java:42)
... 32 more

Step 4 under Create and run a simple Clojure project (Hello World) currently reads

Type code in it to define a function: (defn hello [world] (str "Hello " who " !")) (leave the (ns helloword) call at the beginning of the file), save the file

but should actually be

Type code in it to define a function: (defn hello [who] (str "Hello " who " !")) (leave the (ns helloword) call at the beginning of the file), save the file

Code is wrong as noted by Lux.

The instructions above should be modified to

Call your function:
> 1:1 helloworld=> (hello "Betty")   hit ctrl-enter
> "Hello Betty !"

Make it clear that people need to type ctrl-enter now instead of just enter. My teammate had an older version and for him just enter works but for me it is ctrl-enter and this wasted some time.

Found the solution here:
http://www.coderanch.com/t/559885/clojure/Incubator/Counter-Clockwise-Eclipse-Plugin-REPL

Very small typo

This:

  ....(leave the (ns helloword)...

Should be:

  ....(leave the (ns helloworld)...

I would fix it myself but I didn't see a way to edit this page.

I also wasted some time until I found the ctrl-enter to get ther REPL working.  

Stale instructions in the labrepl/EGit section:

Menu File > Import … > Git > Git Repository ; Hit Next

should be

Menu File > Import … > Git > Projects From Git; Hit Next

and

Uncheck "Import Existing Projects"

should be

Check "Import as General Project"

Import the maven project into Eclipse

is not needed; the project is imported automatically in the Git "Import as General Project" step.

• Also, for Maven, the user needs to install a JDK and configure it as the JVM for use when running Eclipse. (Maven gives a warning when Maven is used.)

I just started looking into Clojure and would like to add that "Browse to Localhost:8080" actually means using Localhost:8080 as URL in your browser (ie. Mozilla Firefox). I spent hours searching for something like a clojure command for that until I found an example on another site that explained it.

I tried asking in the google group but no one there seems to know/care about it so I`ll try here also: After I started the tutorial once I cannot start it again. It will give me this error after typing (require 'labrepl):

NoClassDefFoundError Could not initialize class labrepl__init java.lang.Class.forName0 (:-2) 

I have to delete the project and download it again from git to be able to start the tutorial again. Does Anyone know how to fix it?

I was getting this same error:

NoClassDefFoundError Could not initialize class labrepl__init java.lang.Class.forName0 (:-2) 

I managed to fix it by updating Maven dependencies (Maven -> Update Dependencies) and then cleaning the project (Project -> Clean).

I hope it works for you...

Should the section re: labrepl remain here?  The last commit on it was ~10 months ago, and it's starting people off with (relatively speaking) fairly old versions of Clojure, compojure, ring, etc.  People in #clojure seem to be stumbling on it after getting ccw working smoothly…