I am trying to test log4j in HelloWorld to see if I can use it for my
logging.

Here is what I have:
//HelloWorld.java
import org.apache.log4j.*;

public class HelloWorld {
   public static Logger logger = Logger.getLogger("HelloWorld");

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

// This is my build.xml:
<?xml version="1.0" encoding="iso-8859-1"?>
<project name="test" default="compile">
   <property name="source.root" value="."/>
   <property name="class.root" value="."/>
   <property name="lib.dir" value="."/>
   <property name="log4j.jar"
value="/export/home/bryan/dev/wui/WEB-INF/lib/log4j-1.2.9.jar"/>

   <path id="project.class.path">
       <pathelement location="${class.root}"/>
       <pathelement location="${log4j.jar}"/>
       <fileset dir="${lib.dir}">
           <include name="*.jar"/>
       </fileset>
   </path>

   <target name="compile" depends="clean">
       <javac srcdir="${source.root}"
           destdir="${class.root}"
           debug="on"
           deprecation="on"
           source="1.4">
           <classpath refid="project.class.path"/>
       </javac>
   </target>

</project>

I can get this to compile, but when I try to run it I get an error:
NoClassDefFoundError: org/apache/log4j/Logger
or
NoClassDefFoundError: org/apache/log4j/Category

Does anyone have any idea?  I can get log4j to work with tomcat, but it
won't work with HelloWorld.  I am using j2sdk1.4.2_08.

Any information would help.

Thanks in advance.