Unable to compile application in eclipse

Question

Please help me compile and run a servlet HelloWorld project in Eclipse.
I am trying to compile a sample helloWorld Servlet in Eclipse 3.x Europa and Tomcat 6. When I click on Run a window comes up asking do I want to run it as a java application or Applet. If I selet Applet, it said that there is no applet avaible. If I select Java Application is will ask to select an item from the list. The following three items appeasr in a list
jspC �
SDCInstaller -
SmapGenerater �
If I go to projec to build the class, it is grey out. However, the option Build Automatically is checked.
If I look in my working directory, I can see a blank bin, src, and work folder. In the WEB-INF directory, I see a empty lib, the scr has the HelloWorld.java, and the class has the Helloworld.class. Please Help me!!!

Answer 1

Thanks,
I was able to compile it. First, I start tomcast, and I stop it right away. Then, I click on run, and it run it. However, I am getting the error message. I think it may have to do with the xml file that I am using. I notice the web-app and servlet name are hilight as if they were spelled wrong. If I change web-app to WEB-APP, it does not show me the error but it does not work either. Below is a copy of my web.xml file and the error message that I am getting when I type the url http://localhost:8080/HelloWorld/hello
" type Status report
message This application is not currently available
description The requested service (This application is not currently available) is not currently available.
Also, I see an exeption in the application see below the class file
<strong > -- XML FILE </strong>
<?xml version="1.0" encoding="ISO-8859-1"?>
<!--<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd"> -->
<web-app>
<servlet>
<servlet-name>Hello</servlet-name>
<servlet-class>HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Hello</servlet-name>
<url-pattern>/HelloServlet</url-pattern>
</servlet-mapping>
</web-app>
<strong> class </strong>
import java.io.*;
import javax.servlet.http.*;
import javax.servlet.*;
public class HelloServlet extends HttpServlet {
public void doGet (HttpServletRequest req,
HttpServletResponse res)
throws ServletException, IOException
PrintWriter out = res.getWriter();
out.println("Hello, Brave new World!");
out.close();
<strong > error Message </strong>
Jan 10, 2008 10:52:02 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.5.0_14\bin;.;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\Java\jre1.6.0_03\bin\client;C:\Program Files\Java\jre1.6.0_03\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Java\jdk1.5.0_14\bin;C:\JDBC\sqljdbc_1.2\enu\sqljdbc.jar;c:\Program Files\Microsoft SQL Server\90\Tools\binn\;C:\Tomcat;C:\Tomcat\bin;C:\eclipse\Workspace;c:/.;C:\Tomcat\lib\servlet-api.jar;C:\Tomcat\lib\jsp-api.jar
Jan 10, 2008 10:52:02 AM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Jan 10, 2008 10:52:02 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 896 ms
Jan 10, 2008 10:52:02 AM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Jan 10, 2008 10:52:02 AM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.14
Jan 10, 2008 10:52:02 AM org.apache.tomcat.util.modeler.Registry registerComponent
SEVERE: Null component Catalina:type=JspMonitor,name=jsp,WebModule=//localhost/HelloWorld,J2EEApplication=none,J2EEServer=none
Jan 10, 2008 10:52:02 AM org.apache.catalina.startup.HostConfig deployDescriptor
SEVERE: Error deploying configuration descriptor HelloWorld.xml
java.lang.UnsupportedClassVersionError: Bad version number in .class file
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1817)
     at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:872)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1325)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
     at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:108)
     at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:58)
     at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:297)
     at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1064)
     at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4239)
     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
     at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
     at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
     at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
     at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
     at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
     at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
     at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
     at org.apache.catalina.core.StandardService.start(StandardService.java:516)
     at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
     at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
     at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Jan 10, 2008 10:52:03 AM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Jan 10, 2008 10:52:03 AM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Jan 10, 2008 10:52:03 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/31 config=null
Jan 10, 2008 10:52:03 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 1348 ms
Jan 10, 2008 10:52:13 AM org.apache.tomcat.util.modeler.Registry registerComponent
SEVERE: Null component Catalina:type=JspMonitor,name=jsp,WebModule=//localhost/HelloWorld,J2EEApplication=none,J2EEServer=none
Jan 10, 2008 10:52:13 AM org.apache.catalina.startup.HostConfig deployDescriptor
SEVERE: Error deploying configuration descriptor HelloWorld.xml
java.lang.UnsupportedClassVersionError: Bad version number in .class file
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1817)
     at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:872)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1325)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
     at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:108)
     at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:58)
     at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:297)
     at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1064)
     at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4239)
     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
     at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
     at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
     at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
     at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1206)
     at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
     at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
     at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
     at java.lang.Thread.run(Thread.java:595)