Trying to implement jcifs and UniAddress and getting NoClassDefFoundError?

Question

I am using JCIFS (http://jcifs.samba.org/). My code is simple and taken from the Login.java example:

import jcifs.*;
import jcifs.smb.*;

public class netp {
    public static void main( String argv[] ) throws Exception {
     System.out.println("START");

     String ip = "10.0.0.1";
     String domain = "domain";
     String user = "user";
     String pass = "pass";

    UniAddress dc = UniAddress.getByName( ip );
    NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication( domain + ";" + user + ":" + pass );
    SmbSession.logon( dc, auth );

     System.out.println("END");

     return;
    }
}

Compiling this works if I do this:

javac -cp jcifs-krb5-1.3.17.jar netp.java

However, if I run it like this:

java -cp jcifs-1.3.17.jar netp

I get:

Error: Could not find or load main class netp

What am I doing wrong?

I've uploaded the complete source code here:

https://www.box.com/s/po4frdmy0obqiroy9anp

Note: I am doing this all in Windows.

Is there a `netp.class` in your current directory after the `javac` step? — Anders R. Bystrup, Oct 15 '12 at 11:28
Also try without the `"..."` just to exhaust the possible error causes... — Anders R. Bystrup, Oct 15 '12 at 11:43
just add the name of the package before netp, and if the path to jcifs is correct and you are running the command "java.." from correct directory it will work. see my answer to what *correct* means. — linski, Oct 15 '12 at 11:50
Once more into the breach, as they say: You must add the current directory to the `-cp` argument and make sure the JARs names are *valid*: `java -cp .;jcifs-krb5-1.3.17.jar netp` — Anders R. Bystrup, Oct 15 '12 at 12:12

linski · Accepted Answer · 2012-10-15T12:09:48.100

2

It seems that your myJavaApp class is in some package and you have omitted the package name in addition to not setting class path at all.

My directory structure for testing:

.
\--- jcifs-1.3.17.jar
\--- testapp
     \--- myJavaApp.java

I compiled it like this:

javac -cp jcifs-1.3.17.jar testapp/myJavaApp.java

which gave myJavaApp.class in testapp folder as expected. I have run it on linux like this:

java -cp .:jcifs-1.3.17.jar testapp.myJavaApp

and on windows like this:

java -cp .;jcifs-1.3.17.jar testapp.myJavaApp

It throwed

jcifs.util.transport.TransportExceptionjava
java.net.NoRouteToHostException: No route to host

which means that the myJavaApp had run succesfully.

If we remove the testapp directoy, e.g.

.
\--- jcifs-1.3.17.jar
\--- myJavaApp.java

it compiles with:

 javac -cp jcifs-1.3.17.jar myJavaApp.java

and on linux runs with:

java -cp .:jcifs-1.3.17.jar myJavaApp

for windows

java -cp .;jcifs-1.3.17.jar myJavaApp

EDIT:

all java[c] commands were run from root(.) / testing directory

EDIT^2:

I have downloaded your code and placed myself in netp directory. Compiled the code like this:

C:\netp>"C:\Program Files\Java\jdk1.6.0_25\bin\javac.exe" -cp jcifs-krb5-1.3.17.jar netp.java

and succesfully run it like this:

C:\netp>"C:\Program Files\Java\jdk1.6.0_25\bin\java.exe" -cp .;jcifs-krb5-1.3.17.jar netp

it outputs:

START
END

edited Oct 15 '12 at 12:09

answered Oct 15 '12 at 11:07

linski

5,046
3
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Will try all of this now, but as an FYI, here is my code --> https://www.box.com/s/po4frdmy0obqiroy9anp – rockstardev Oct 15 '12 at 11:54
I've now changed what I had and I am running it exactly like this, but I still get: Error: Could not find or load main class netp.java ... for some reason it's not picking it up and I can't see why. – rockstardev Oct 15 '12 at 12:02
2

"Could not find or load main class netp.java" when you compile you put ".java". when you run there is no file type just full class name (in your case - just netp) see my last update – linski Oct 15 '12 at 12:10
So the problem has to do with PATH issues. If I run it the way you suggested, it works. I will keep investigating and post the final cause of the problem when I'm done! But thank you Linski! You helped a lot! – rockstardev Oct 15 '12 at 12:17
in order too run just "java[c]" from your command line you must have some jre[jdk] pointed at in your [PATH variable](http://www.computerhope.com/issues/ch000549.htm) see what's in there, you may be pointing at "wrong" jdk. – linski Oct 15 '12 at 12:21

score 1 · Answer 2 · answered Oct 12 '12 at 14:16

1

You need to provide the jar on class path too when you run the program:

java -cp jcifs_1.3.17/jcifs-1.3.17.jar myJavaApp

answered Oct 12 '12 at 14:16

Adam Dyga

8,666
4
27
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Doesnt work... says: Error: Could not find or load main class myJavaApp – rockstardev Oct 12 '12 at 14:27
@RD is the myJavaApp.class file in the current directory? – Adam Dyga Oct 12 '12 at 14:48
Yes it is! To me it looks like its somehow not picking up the JAR file, but I can't understand why. It looks like I'm doing everything right, but no luck... – rockstardev Oct 12 '12 at 14:54

Anders R. Bystrup · Answer 3 · 2012-10-15T11:30:07.863

1

Try adding current directory to the classpath as well:

java -cp .:jcifs-krb5-1.3.17/jcifs-krb5-1.3.17.jar myJavaApp

If you're on Windows, replace the colon with semi-colon: java -cp .;jcifs-krb5-1.3.17/jcifs-krb5-1.3.17.jar myJavaApp

Cheers,

edited Oct 15 '12 at 11:30

answered Oct 15 '12 at 07:13

Anders R. Bystrup

15,729
10
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I'm on a linux system and using `:` as CP separator works for me. If you're on a Windows box you might want to try with semi-colon/`;` and enclose the CP in `"..."`: `java -cp ".;jcifs_1.3.17/jcifs-1.3.17.jar" myJavaApp`. – Anders R. Bystrup Oct 15 '12 at 11:10
Incidentally, how did `bruteHack` get into the game? – Anders R. Bystrup Oct 15 '12 at 11:12
Sorry, jumping between difference versions. Will upload the full code in a bit. – rockstardev Oct 15 '12 at 11:27

Trying to implement jcifs and UniAddress and getting NoClassDefFoundError?

3 Answers3