Question

My knowledge of Java is rather rusty, but I’ve been forced to use it and am having some terrible classpath troubles…

I’m trying to import a jwebserver class. It should be straightforward, but I don’t know how!

Here is my server.java file:

import java.io.*;
import org.jWebSocket.*;

public class server
{
        public static void main(String args[])
        {
                System.out.println("Hello World!");
        }
}

And here is the error when I try to compile:

>>> javac -classpath ./libs/jWebSocketServer-0.9.5.jar server.java 
server.java:2: package org.jWebSocket does not exist
import org.jWebSocket.*;
^
1 error

Here is an ls output:

>>> ls
bin  conf  libs  logs  server.java

and here is an ls ./libs output:

>>> ls ./libs
commons-lang-2.5.jar
javolution-5.5.1.jar
json-2-RELEASE65.jar
jWebSocketAdmin-0.9.5.jar
jWebSocketCluster-0.9.5.jar
jWebSocketCore-0.9.5.jar
jWebSocketCustomServer-0.9.5.jar
jWebSocketFactory-0.9.5.jar
jWebSocketNettyEngine-0.9.5.jar
jWebSocketPlugins-0.9.5.jar
jWebSocketSamples-0.9.5.jar
jWebSocketServer-0.9.5.jar
jWebSocketSharedObjects-0.9.5.jar
jWebSocketTCPEngine-0.9.5.jar
jWebSocketTokenServer-0.9.5.jar
jWebSocketToolkit-0.9.5.jar
log4j-1.2.15.jar
netty-3.2.0.BETA1.jar
servlet-api-2.5-6.1.14.jar
slf4j-api-1.5.10.jar
slf4j-jdk14-1.5.10.jar

I’m hoping someone can help me here.

Many thanks in advance,

Answer 1

After a quick look at jWebSocket, the problem might just be case sensitivity in your package name.

Try import org.jwebsocket.*;

That should get your code to compile. Getting it to do something useful, on the other hand… 🙂 try the JavaDocs on the website (the Java/JS Docs link on the jWebSocket website)

---

Update: There’s nothing actually in the package org.jwebsocket. There is a class in org.jwebsocket.console, so try import org.jwebsocket.console.*;