Java Programming

Hey guys. new to java and need some help to figure out what the problem here might be.
i am working in jdeveloper at the moment and have just succeeded to import my HTTPClient library and to test it i ran a tutorial code but it come upp with some errors.

code:
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.*;
import org.apache.commons.httpclient.params.HttpMethodParams;

import java.io.*;

public class HttpClientTutorial {

private static String url = "http://www.apache.org/";

public static void main(String[] args) {
// Create an instance of HttpClient.
HttpClient client = new HttpClient();

// Create a method instance.
GetMethod method = new GetMethod(url);

// Provide custom retry handler is necessary
method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler(3, false));

try {
// Execute the method.
int statusCode = client.executeMethod(method);

if (statusCode != HttpStatus.SC_OK) {
System.err.println("Method failed: " + method.getStatusLine());
}

// Read the response body.
byte[] responseBody = method.getResponseBody();

// Deal with the response.
// Use caution: ensure correct character encoding and is not binary data
System.out.println(new String(responseBody));

} catch (HttpException e) {
System.err.println("Fatal protocol violation: " + e.getMessage());
e.printStackTrace();
} catch (IOException e) {
System.err.println("Fatal transport error: " + e.getMessage());
e.printStackTrace();
} finally {
// Release the connection.
method.releaseConnection();
}
}
}

The error i get:
"C:\Program Files\jdev\jdk\bin\javaw.exe" -client -classpath "C:\Program Files\jdev\jdev\mywork\Test\Project1\classes;C:\Program Files\jdev\jdk\jre\lib\commons-httpclient-3.1\commons-httpclient-3.1.jar;C:\Program Files\jdev\jdk\jre\lib\commons-codec-1.3;C:\Program Files\jdev\jdk\jre\lib\commons-logging-1.1.1-src" HttpClientTutorial
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.apache.commons.httpclient.HttpClient.<clinit>(HttpClient.java:66)
at HttpClientTutorial.main(HttpClientTutorial.java:13)
Process exited with exit code 1.

Anyone have an idea what the problem could be?