Chn.util not found?

I know this is only a question that I a new person to java will ask but.
I cant seem to run my program cause the chn.util is not found?
Isnt it supposed to come with netbean. I found the .jar file but i dont know where to put it
change.java [4:1] package chn.util does not exist
import chn.util.*;
Heres the problem i found.
P.S.
whats a javadoc?
I know its supposed to be like helpers but i cant find any javadocs to compile/execute/mount

If you need to use it in Netbeans (NB), putting it in your classpath will not work. NB, like most Integrated Development Environments (IDE) does not use the externally set classpath. For NB to recognize it, you need to mount it in NB. Click the File menu and select mount. NB help has extensive information about this.
These are JavaDocs, also called Java Application Program Interface (API) Specifications
http://java.sun.com/j2se/1.4.2/docs/api/index.html
They can be downloaded to your machine from here as part of the Java Documentation
http://java.sun.com/j2se/1.4.2/download.html

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[solved] error: gnome-doc-utils = 0.3.2 not found during configuring

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libdbusmenu-12.10.2.tar.gz ... Passed
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Last edited by harro112 (2013-02-26 12:37:33)

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Class not found com/sun/java/util/collections/list

hi
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Try it like this:
          java weblogic.jspc -d c:\weblogic\classes;c:\weblogic\lib\weblogicaux.jar ...
          Melrose Public Library <[email protected]> wrote:
          > hi
          > i am trying to execute the following:
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          > any suggestions?
          > thanx
          Dimitri

The java class is not found: oracle/aurora/util/Wrapper

When I try and load my Java class file using 'loadjava' into Oracle I'm getting the error:
The java class is not found: oracle/aurora/util/Wrapper
What is causing this?

On which machine should ORACLE_SID be set to solve this problem, server or client. I run into this error when run loadjava

Weblogic.utils.StackTraceUtils not found

Platform: Sun OS 5.7 (Solaris 2.7?), Weblogic 5.1 SP6.
          I have an application that contains some JSPs and Servlets. I'm using
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          2. what to do to avoid the exception (since it worked fine for 200
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          ----------------------- extract of server output --------------------
          The errorIndices is currently: []
          Hints validated.java.lang.NullPointerException
          at weblogic.boot.ServerClassLoader.findLocalClass(Compiled
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          at weblogic.boot.ServerClassLoader.loadClass(Compiled Code)
          at java.lang.ClassLoader.loadClass(Compiled Code)
          at java.lang.ClassLoader.loadClassInternal(Compiled Code)
          at
          weblogic.logging.TextStreamLogger.log(TextStreamLogger.java:77)
          at weblogic.logging.LogManager.log(Compiled Code)
          at weblogic.logging.LogOutputStream.error(Compiled Code)
          at weblogic.t3.srvr.ListenThread.run(Compiled Code)
          java.lang.NullPointerException
          at weblogic.boot.ServerClassLoader.findLocalClass(Compiled
          Code)
          at weblogic.boot.ServerClassLoader.loadClass(Compiled Code)
          at java.lang.ClassLoader.loadClass(Compiled Code)
          at java.lang.ClassLoader.loadClassInternal(Compiled Code)
          at
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          at weblogic.logging.LogManager.log(Compiled Code)
          at weblogic.logging.LogOutputStream.alert(Compiled Code)
          at weblogic.t3.srvr.ListenThread.run(Compiled Code)
          Wed Nov 22 15:25:09 MST 2000:<!> <ListenThread> **** The WebLogic Server
          is n\
          o longer listening for connections.
          Wed Nov 22 15:25:09 MST 2000:<!> <ListenThread> **** You should probably
          rest\
          art it.
          Wed Nov 22 15:25:09 MST 2000:<I> <WebLogicServer> Server shutdown by
          system
          Wed Nov 22 15:25:09 MST 2000:<I> <WebLogicServer> Server shutdown
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          NOW
          Wed Nov 22 15:25:09 MST 2000:<A> <SSLListenThread> ListenThread.run()
          failed:\
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          Wed Nov 22 15:25:09 MST 2000:<!> <SSLListenThread> **** The WebLogic
          Server i\
          s no longer listening for connections.
          Wed Nov 22 15:25:09 MST 2000:<!> <SSLListenThread> **** You should
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          estart it.
          Wed Nov 22 15:25:09 MST 2000:<I> <WebLogicServer> Server shutdown by
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          at weblogic.logging.LogOutputStream.alert(Compiled Code)
          at weblogic.t3.srvr.ListenThread.run(Compiled Code)
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Thanks Sumanth and Cameron. I have 64 descriptors when I do "limit". I'm
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          Appreciate your help.
          -Wayne
          Sumanth Yamala wrote:
          >
          > lsof gives the number of file descriptors open
          >
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          >
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          >
          > And reboot with -r.
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          >
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          > -Sumanth
          >
          > Wayne Xin wrote:
          >
          > > Platform: Sun OS 5.7 (Solaris 2.7?), Weblogic 5.1 SP6.
          > >
          > > I have an application that contains some JSPs and Servlets. I'm using
          > > SilkPerformer to simulate multiple users. It was fine if I used only 200
          > > virtual users, but I ran into the following problem when I used 250 (240
          > > too).
          > >
          > > It complained some kind of NullPointerException (see below) which never
          > > happened for under 200 users. And then it complained this
          > > weblogic.utils.StackTraceUtils not found. This class belongs to
          > > /weblogic/classes which is in my weblogic.class.path when the server is
          > > started.
          > >
          > > I'm guess weblogic server ran into some unexpected exception and the
          > > logger wanted to call this class to report the error. So I need to find
          > > out 2 things:
          > >
          > > 1. how to reveal the real exception/error.
          > > 2. what to do to avoid the exception (since it worked fine for 200
          > > virtual users).
          > >
          > > For 1, I have no clue. Hope someone out there can help me.
          > >
          > > For 2, I remember seeing "Too many opened files" at some run which may
          > > indicating that, when handling too many users (250) at one time, WL
          > > server has opened one copy of certain file (JSP/html) for each user and
          > > used up system allowed file handles. If this is true, I may be able to
          > > get rid of this problem by increasing the allowed number of file
          > > handles. But I'd like to see a better solution (say, configure the
          > > server certain way to share the files). By the way, this is not
          > > happening on NT. Maybe NT has more allowed file handles and I can only
          > > run as many as 250 users.
          > >
          > > Anyway comments are appreciated.
          > >
          > > -Wayne
          > >
          > > ----------------------- extract of server output --------------------
          > > ...
          > > The errorIndices is currently: []
          > > Hints validated.java.lang.NullPointerException
          > > at weblogic.boot.ServerClassLoader.findLocalClass(Compiled
          > > Code)
          > > at weblogic.boot.ServerClassLoader.loadClass(Compiled Code)
          > > at java.lang.ClassLoader.loadClass(Compiled Code)
          > > at java.lang.ClassLoader.loadClassInternal(Compiled Code)
          > > at
          > > weblogic.logging.TextStreamLogger.log(TextStreamLogger.java:77)
          > > at weblogic.logging.LogManager.log(Compiled Code)
          > > at weblogic.logging.LogOutputStream.error(Compiled Code)
          > > at weblogic.t3.srvr.ListenThread.run(Compiled Code)
          > > java.lang.NullPointerException
          > > at weblogic.boot.ServerClassLoader.findLocalClass(Compiled
          > > Code)
          > > at weblogic.boot.ServerClassLoader.loadClass(Compiled Code)
          > > at java.lang.ClassLoader.loadClass(Compiled Code)
          > > at java.lang.ClassLoader.loadClassInternal(Compiled Code)
          > > at
          > > weblogic.logging.TextStreamLogger.log(TextStreamLogger.java:77)
          > > at weblogic.logging.LogManager.log(Compiled Code)
          > > at weblogic.logging.LogOutputStream.alert(Compiled Code)
          > > at weblogic.t3.srvr.ListenThread.run(Compiled Code)
          > > Wed Nov 22 15:25:09 MST 2000:<!> <ListenThread> **** The WebLogic Server
          > > is n\
          > > o longer listening for connections.
          > > Wed Nov 22 15:25:09 MST 2000:<!> <ListenThread> **** You should probably
          > > rest\
          > > art it.
          > > Wed Nov 22 15:25:09 MST 2000:<I> <WebLogicServer> Server shutdown by
          > > system
          > > Wed Nov 22 15:25:09 MST 2000:<I> <WebLogicServer> Server shutdown
          > > commencing \
          > > NOW
          > > Wed Nov 22 15:25:09 MST 2000:<A> <SSLListenThread> ListenThread.run()
          > > failed:\
          > >
          > > java.lang.ThreadDeath
          > >
          > > Wed Nov 22 15:25:09 MST 2000:<!> <SSLListenThread> **** The WebLogic
          > > Server i\
          > > s no longer listening for connections.
          > > Wed Nov 22 15:25:09 MST 2000:<!> <SSLListenThread> **** You should
          > > probably r\
          > > estart it.
          > > Wed Nov 22 15:25:09 MST 2000:<I> <WebLogicServer> Server shutdown by
          > > system
          > > java.lang.NoClassDefFoundError: weblogic/utils/StackTraceUtils
          > > at
          > > weblogic.logging.TextStreamLogger.log(TextStreamLogger.java:77)
          > > at weblogic.logging.LogManager.log(Compiled Code)
          > > at weblogic.logging.LogOutputStream.alert(Compiled Code)
          > > at weblogic.t3.srvr.ListenThread.run(Compiled Code)
          > > hints are: [Ljava.lang.String;@1646d1e
          > > hints are: [Ljava.lang.String;@ef3ad1
          > > hints are: [Ljava.lang.String;@a43826
          > > ....

Weblogic.utils.AssertionError: ***** ASSERTION FAILED *****[ Environment not found on thread ]

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               at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
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               at weblogic.common.internal.ChunkedObjectInputStream.readObjectWL(ChunkedObjectInputStream.java:167)
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               at weblogic.rmi.cluster.ReplicaAwareRemoteRef.readExternal(ReplicaAwareRemoteRef.java:384)
               at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1686)
               at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1644)
               at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
               at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
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               at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
               at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
               at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
               at weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:119)
               at weblogic.rjvm.ResponseImpl.getThrowable(ResponseImpl.java:115)
               at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:106)
               at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:138)
               at weblogic.jms.dispatcher.DispatcherImpl_811_WLStub.dispatchSyncNoTranFuture(Unknown
          Source)
               at weblogic.jms.dispatcher.DispatcherWrapperState.dispatchSyncNoTran(DispatcherWrapperState.java:463)
               at weblogic.jms.client.JMSSession.createDestination(JMSSession.java:1961)
               at weblogic.jms.client.JMSSession.createTopic(JMSSession.java:1353)
               at JMSProvider.getTopic(JMSProvider.java:127)
               at JMSPub.startJMSPubs(JMSPub.java:229)
               at JMSPub.main(JMSPub.java:138)


I'm not familiar with this problem - but I can make
          a guess at some work-arounds:
          (1) Lookup the destination via a standard JNDI
          context lookup rather than "createTopic()".
          (2) Make sure that the thread calling "createTopic()"
          also previously created a JNDI context.
          Matt Dickens wrote:
          > Using 8.12 server. Trying to connect using weblogic.jms.ConnectionFactory, this
          > is what's being thrown. I've been told it's a known bug that has not been patched
          > yet, but I figured I would still ask.
          > -------------------------
          > weblogic.utils.AssertionError: ***** ASSERTION FAILED *****[ Environment not found
          > on thread ]
          >      at weblogic.jndi.internal.NamingNodeReplicaHandler.<init>(NamingNodeReplicaHandler.java:150)
          >      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
          >      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
          >      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
          >      at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
          >      at java.lang.Class.newInstance0(Class.java:306)
          >      at java.lang.Class.newInstance(Class.java:259)
          >      at weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:98)
          >      at weblogic.common.internal.ChunkedObjectInputStream.readObjectWL(ChunkedObjectInputStream.java:167)
          >      at weblogic.common.internal.ChunkedObjectInputStream$NestedObjectInputStream.readObjectWL(ChunkedObjectInputStream.java:341)
          >      at weblogic.rmi.cluster.ReplicaAwareRemoteRef.readExternal(ReplicaAwareRemoteRef.java:384)
          >      at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1686)
          >      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1644)
          >      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
          >      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
          >      at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:452)
          >      at weblogic.rmi.internal.StubInfo.readObject(StubInfo.java:116)
          >      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          >      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          >      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          >      at java.lang.reflect.Method.invoke(Method.java:324)
          >      at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
          >      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
          >      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
          >      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
          >      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
          >      at weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:119)
          >      at weblogic.common.internal.ChunkedObjectInputStream.readObjectWL(ChunkedObjectInputStream.java:167)
          >      at weblogic.common.internal.ChunkedObjectInputStream$NestedObjectInputStream.readObjectWL(ChunkedObjectInputStream.java:341)
          >      at weblogic.jndi.internal.WLContextImpl.readExternal(WLContextImpl.java:430)
          >      at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1686)
          >      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1644)
          >      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
          >      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
          >      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
          >      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
          >      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
          >      at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
          >      at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
          >      at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
          >      at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
          >      at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
          >      at weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:119)
          >      at weblogic.rjvm.ResponseImpl.getThrowable(ResponseImpl.java:115)
          >      at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:106)
          >      at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:138)
          >      at weblogic.jms.dispatcher.DispatcherImpl_811_WLStub.dispatchSyncNoTranFuture(Unknown
          > Source)
          >      at weblogic.jms.dispatcher.DispatcherWrapperState.dispatchSyncNoTran(DispatcherWrapperState.java:463)
          >      at weblogic.jms.client.JMSSession.createDestination(JMSSession.java:1961)
          >      at weblogic.jms.client.JMSSession.createTopic(JMSSession.java:1353)
          >      at JMSProvider.getTopic(JMSProvider.java:127)
          >      at JMSPub.startJMSPubs(JMSPub.java:229)
          >      at JMSPub.main(JMSPub.java:138)

Deployment utility gives file not found warning, but build completes succesfully.

When running the deployment utility, I am able to analyze source files successfully; no problems there. When I go to build, all appears to go well until I click the popup that has the message: "The build is finished." After closing the popup, I get the following warning:
"Warning: This problem will cause an error when building a deployable image or an installer. The following file(s) were not found:"
It's followed by a list of dozens of files. However, I verified that all files are included in the search directories.
I installed the deployment as-is and it seems to run ok; it finds the files it's supposed to. However, I'm going to have a hard time selling this procedure off to QA if the deployment shows a 'file not found' message.
My question is: why do I get the 'file not found' warning during the deployment build process, yet the 'analyze source file' step finishes ok and the deployed files work ok?

These files are all relative and are part of the workspace. I did find a
workaround to the problem.
In the search directories selection box, the top-level entry is "Current
sequence file" with subdir search enabled. The next entry is the workspace
directory with subdir search enabled; all files are in subdirs of the
workspace directory. The remaining entries are unchecked or not
user-defined (ie.: other NI directories on my computer). In order for the
deployment to work, I had to enable the third entry on the list: "Initial
directory" along with subdir enabled. However, the initial directory is
the same as the workspace directory (since I opened teststand by
double-clicking on my .tsw file). What I don't understand is why should it
matter that I have initial directory on the path if it's the same as the
entry before it?

Brand new airport extreme not found on utility on iPad

I Just purchased the AirPort Extreme. My first Apple router but all of our devices are apple products with the exception of our pc. Extreme is flashing Amber light and is not found in the airport utility app. I want to enjoy this apple product as much as the others but it's becoming difficul.

OK, thanks for clarifying that for me.
If you have the Setup Guide handy that came with your AirPort Extreme, please head for page 12 and locate the heading to......
Setting Up AirPort Extreme Using an iOS Device.........To Set It Up
The steps here are pretty clear, and we rarely get a question about this but, we'll go through this in case you might have missed something.
1. Tap Settings on the iPad home screen. Settings is the gear looking icon there. Then, tap WiFi. WiFi is on the left side of the screen.
2. Tap the name of the AirPort Extreme. AirPort Extreme is located just under the heading of SET UP NEW AIRPORT BASE STATION there.
In the example below from an iPhone screen, I am setting up a new AirPort Express. So, I would tap on AirPort Express. You will see AirPort Extreme on your iPad screen, so you would tap on AirPort Extreme.
When you do this, that will start up the setup wizard.
3. Follow the onscreen instructions to create a new network or extend an existing network. The setup wizard will analyze the network and suggest the correct setup for you.
Once the AirPort Extreme has been set up, then you can use AirPort Utility to edit or modify any of the settings that you might need to adjust.

Import export utility user not found

I'm getting the following error when running the 9.3.1 ImportExportUtility on a 9.2.0.2 version of Shared Services. NTLM is used as the authentication provider.
2009-06-19 08:49:30,642 Export : Exception encountered while retrieving user ntlm://SID=S-1-5-21-2134593322-327503246-231145771-21130?USER
2009-06-19 08:49:30,642 Export : Root cause : User not found with identity = ntlm://SID=S-1-5-21-2134593322-327503246-231145771-21130?USER
2009-06-19 08:49:30,658 Export : Silently ignoring the last error
There were 99 users extracted and this message appeared for 36 of the 99. Could someone tell me where the users are not in sync. Is it between Open Ldap and NTLM, Open Ldap and the application repository, etc. Also, is there a way of identifying the user Id. from the message.
Thanks,
Tom

I finally found a real solution to this problem and I wish I had found it sooner.......
Starting sometime around 9.2, Oracle started including a tool called : UpdateNativeDir
The primary purpose of the tool (as I understand it) is to allow you to do a refresh between your external provider (i.e. Active Directory) and the native (OpenLDAP) directory in the event you moved directories around. This tool will also purge any invalid entries that are in the local (LDAP) directory that are not in the external provider.
The tool is pretty straight forward and the readme file explains the details of how to use it.
I've tested this tool in our dev and production environments now and it does exactly what I need. The additional benefit is that I can schedule this to run periodically to ensure the directories are sync'd.
The tool is going to be on your Shared Services machine and comes zipped in a file called UpdateNativeDir.zip
According to the documention (9.2.0.3) it is located at :
<Hyperion_Home>/common/utilities/nativedirectoryupdateutility
On our 9.3.1 Shared Services box, I located it at :
<Hyperion_Home>/common/utilities/SyncOpenLdapUtility

Itunes wont open at all, error message : quicktime was not found .... please reinstall ... i did that but no luck this only seems to have happened since the 10.4 update, im on windows 7 ..

itunes wont open at all, error message : quicktime was not found .... please reinstall ... i did that but no luck this only seems to have happened since the 10.4 update, im on windows 7 ..

Can you start QuickTime on your computer?
You'll probably have to search for the Windows Installer Cleanup Utility and use it to remove QuickTime Player and iTunes. Then download and install the iTunes again.

File not found error

I get the following error, but don't know why it can't find the file. Is there anything in this script that would call "\" instead of "/"? Is there any line of code that will switch a wayward "\" back?
01-09-24 09:37:02 - path="" :jsp: init
2001-09-24 09:43:42 - path="" :LoginServlet: init
2001-09-24 09:44:15 - path="" :CourseServlet: init
2001-09-24 09:46:48 - path="" :LessonServlet: init
2001-09-24 09:46:54 - path="" :Error: /usr/local/apache/sites/tesco.spinweb.net/htdocs/cmi/courses\Food Service/Intro/AU00.html (No such file or directory)
The script is below. Thanks for any help anyone can provide me.
import cmi.xml.AU;
import cmi.xml.Block;
import cmi.xml.CourseReader;
import cmi.xml.CSFElement;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServlet;
import org.jdom.JDOMException;
public class LessonServlet extends HttpServlet
public void init (ServletConfig config) throws ServletException
super.init (config);
try {
               Class.forName (GlobalData.DatabaseDriverName);
               _jdbcConnection = DriverManager.getConnection (GlobalData.DatabaseName, "tesco", "scorm");
_jdbcConnection.setAutoCommit (true);
//should I do this?
//_jdbcConnection.setAutoCommit (false);
//load serialized course data
loadCourseData();
          catch (Exception xcp) {
               xcp.printStackTrace();
               getServletContext().log("Error: " + xcp.getMessage());
public void doGet( HttpServletRequest request,
                         HttpServletResponse response)
          throws ServletException, IOException
boolean normalMode = true;
try {
HttpSession session = request.getSession (true);
//can I load the session given the id??
//System.out.println ("Lesson.valid session " + session.getId() + ": " + request.isRequestedSessionIdValid());
response.setContentType ("text/html");
JDBCHelper dbHelper = new JDBCHelper (_jdbcConnection);
//get student ID
Integer studentID = (Integer) session.getAttribute ("studentID");
//get course ID
Integer courseID = (Integer) session.getAttribute ("courseID");
//get lesson ID
String lessonID = request.getParameter ("lessonID");
if (lessonID == null) {
lessonID = (String) session.getAttribute ("lessonID");
if (studentID == null || courseID == null || lessonID == null) {
//reset session data by re-logging the user
sendProfileError (response.getOutputStream());
return;
//store lesson ID in session
session.setAttribute ("lessonID", lessonID);
String auID = request.getParameter ("auID");
String mode = request.getParameter ("mode");
if (mode != null) {
session.setAttribute ("mode", mode);
else {
mode = (String) session.getAttribute ("mode");
if (mode.equalsIgnoreCase ("review")) {
normalMode = false;
else {
normalMode = true;
//synchronize access to course hash table
synchronized (_courseHash)
//make sure _courseHash is in tact
if (_courseHash == null) {
//try reloading it....
loadCourseData();
if (_courseHash == null) {
//error
response.getOutputStream().close();
throw new IOException ("Corrupt course data");
if (! _courseHash.containsKey (courseID.toString())) {
//try reloading it....
loadCourseData();
if (! _courseHash.containsKey (courseID.toString())) {
//error
response.getOutputStream().close();
throw new IOException ("Corrupt course data (course not found)");
if (auID == null) {
//show course menu
Hashtable hash = (Hashtable) _courseHash.get (courseID.toString());
sendAvailableAUs (hash, studentID.intValue(), courseID.intValue(), lessonID, response.getOutputStream(), response, dbHelper);
return;
//if AU has not been attempted, initialize it
Integer auDataID = new Integer (getAUDataID (studentID.intValue(), courseID.intValue(), lessonID, auID, dbHelper));
//if (getAUDataID (studentID.intValue(), courseID.intValue(), lessonID, auID, dbHelper) == -1) {
if (auDataID.intValue() == -1) {
int newID = initializeAUData (studentID.intValue(), courseID.intValue(), lessonID, auID, dbHelper);
dbHelper.addAUToPath (studentID.intValue(), courseID.intValue(), lessonID, auID);
auDataID = new Integer (newID);
session.setAttribute ("AUID", auID);
session.setAttribute ("AUDataID", auDataID);
sendAU (studentID.intValue(), courseID.intValue(), lessonID, auID, auDataID.intValue(), normalMode, response.getOutputStream(), dbHelper);
//to do: detailed messages should be sent to the client depending on which
// exception was thrown. Don't have one try/catch....have one for each situation
catch (Exception e) {
e.printStackTrace();
               getServletContext().log("Error: " + e.getMessage());
public void destroy()
          try {
               if (_jdbcConnection != null) {
                    _jdbcConnection.close();
          catch (Exception ignored) {}
private int initializeAUData (int studentID, int courseID, String lessonID, String auID, JDBCHelper dbHelper)
String sqlQuery = null;
ResultSet results = null;
try {
//get student's name
sqlQuery = "SELECT Full_Name" +
" FROM " + GlobalData.StudentTable +
" WHERE Student_ID = " + studentID;
results = dbHelper.doQuery (sqlQuery);
if (! results.next()) {
//error
return -1;
String studentName = results.getString (1);
results.close();
//the lock prevents CMIServlet from reading AU_ID before it's committed
//sqlQuery = "LOCK TABLES " + GlobalData.AUDataTable + " WRITE;";
//System.out.println (sqlQuery);
//dbHelper.executeUpdate (sqlQuery);
sqlQuery = "Insert Into " + GlobalData.AUDataTable +
"(Course_ID, Lesson_ID, AU_ID, student_id, student_name, lesson_location, credit," +
" lesson_status, entry, exit, score_raw, score_max, score_min, total_time," +
" session_time, lesson_mode, suspend_data, launch_data, Evaluation_ID, Objective_ID)" +
" Values (" + courseID + ", '" + lessonID + "', '" + auID + "', " + studentID + ", '" + studentName + "'," +
" 'NA', 'credit'," + " 'not attempted', 'ab-initio', " + "'NA', " + 0 + ", " + 0 + ", " + 0 +
", '00:00:00.0', '00:00:00.0', " + " 'normal'" + ", 'NA', " + "'NA', " + 0 + ", " + 0 + ");";
dbHelper.executeUpdate (sqlQuery);
return getAUDataID (studentID, courseID, lessonID,auID, dbHelper);
//sqlQuery = "UNLOCK TABLES;";
//System.out.println (sqlQuery);
//dbHelper.executeUpdate (sqlQuery);
catch (Exception e) {
e.printStackTrace();
               getServletContext().log("Error: " + e.getMessage());
return -1;
private int getAUDataID (int studentID, int courseID, String lessonID, String auID, JDBCHelper dbHelper)
throws SQLException
String sqlQuery = "SELECT AUData_ID, lesson_status, lesson_mode, exit" +
                              " FROM " + GlobalData.AUDataTable +
                              " WHERE student_id = " + studentID +
                              " AND Course_ID = " + courseID +
" AND Lesson_ID = " + "'" + lessonID + "'" +
" AND AU_ID = '" + auID + "';";
ResultSet results = dbHelper.doQuery (sqlQuery);
if (results.next()) {
return results.getInt ("AUData_ID");
return -1;
private void sendAU (int studentID, int courseID, String lessonID, String auID, int auDataID, boolean normalMode, ServletOutputStream htmlOut, JDBCHelper dbHelper)
throws IOException, ClassNotFoundException
Hashtable hash = null;
synchronized (_courseHash)
hash = (Hashtable) _courseHash.get (String.valueOf (courseID));
if (hash == null) {
loadCourseData();
hash = (Hashtable) _courseHash.get (String.valueOf (courseID));
if (hash == null) {
throw new IOException ("Corrupt course data (course not found)");
AU au = (AU) hash.get (auID);
try {
if (! normalMode) {
dbHelper.setReviewMode (auDataID);
String courseFileName = getFileName (String.valueOf (courseID), dbHelper);
File file = new File (courseFileName);
//create absolute path to file so we can resolve relative URLs
String newFileName = file.getParent() + "\\" + au.getLaunchParams();
               BufferedReader buf = new BufferedReader (new FileReader (newFileName));
PrintWriter htmlWriter = new PrintWriter (htmlOut);
               String temp;
htmlWriter.write (getAUHtml (au.getLaunchParams()));
htmlWriter.flush();
htmlWriter.close();
catch (Exception e) {
e.printStackTrace();
               getServletContext().log("Error: " + e.getMessage());
private String getAUHtml (String path){
path = path.replace ('\\','/');
String response;
response = "<html>\n" +
                    "<head>\n" +
"</head>\n" +
"<body>\n" +
"<script language=\"JavaScript\">\n" +
"document.location = \"/cmi/courses/" + path + "\"\n" +
//"win = window.open ('','displayWindow','menubar=yes,scrollbars=yes,status=yes,width=300,height=300');\n" +
//"window.onload = \"win.close();\"" +
"</script>\n" +
"</body>\n" +
"</html>\n";
return response;
private void sendAvailableAUs (Hashtable hash, int studentID, int courseID, String lessonID, ServletOutputStream out, HttpServletResponse response, JDBCHelper dbHelper)
StringBuffer buf = new StringBuffer (200);
Block block = (Block) hash.get (lessonID);
AU au = null;
try {
Vector completedAUs = dbHelper.getCompletedAUs (studentID, courseID, lessonID);
buf.append ("<html>\n" +
                    "<head>\n" +
"<title>" + block.getTitle() + " units</title>\n" +
"<script language=\"JavaScript\">\n" +
"function go() {\n" +
" var form = document.goForm;\n" +
" var index = form.gotoSelect.selectedIndex;\n" +
" if (index == 0) {\n" +
" document.location = \"/servlet/CourseServlet?courseID=" + courseID + "\";\n" +
" }\n" +
" else if (index == 1) {\n" +
" top.restart();\n" +
" }\n" +
"}\n" +
"</script>\n" +
"</head>\n" +
"<body background=\"/cmi/images/marble.jpg\">\n" +
"<center><h1><b><u>" + block.getTitle() + "</u></b></h1></center>\n" +
"<p></p>\n<p></p>\n" +
"<b>" + block.getTitle() + " contains the following units: </b>\n" +
"<dl>\n");
Enumeration enum = block.getChildren();
while (enum.hasMoreElements()) {
String temp = (String) enum.nextElement();
CSFElement element = (CSFElement) hash.get (temp);
if (element.getType().equals ("au")) {
au = (AU) element;
if (completedAUs.contains (au.getID())) {
buf.append ("<dt><p><img src=\"/cmi/images/node2.gif\"><a href=\"/servlet/LessonServlet?lessonID=" + block.getID() + "&auID=" + au.getID() + "&mode=review\">" + au.getTitle() + " (<i>review</i>) </a></p></dt>\n");
else {
buf.append ("<dt><p><img src=\"/cmi/images/node.gif\"><a href=\"" + response.encodeURL ("/servlet/LessonServlet?lessonID=" + block.getID() + "&auID=" + au.getID() + "&mode=normal") + "\">" + au.getTitle() + "</a></p></dt>\n");
else if (element.getType().equals ("block")) {
buf.append ("<dt><p><img src=\"/cmi/images/folder.gif\"><a href=\"" + response.encodeURL ("/servlet/LessonServlet?lessonID=" + element.getID() + "&mode=normal") + "\">" + element.getTitle() + "</a></p></dt>\n");
buf.append ("</dl>\n" +
"<br><br>\n" +
"<form name=\"goForm\">\n" +
"<select name=\"gotoSelect\">\n" +
" <option value=\"lesson\">Lesson Menu</option>\n" +
" <option value=\"exit\">Exit LMS</option>\n" +
"</select>\n" +
"<input type=\"button\" value=\"Go\" onClick=\"go()\">\n" +
"</form>\n" +
"</body>\n" +
"</html>");
PrintWriter writer = new PrintWriter (out);
writer.write (buf.toString());
writer.flush();
writer.close();
catch (Exception e) {
e.printStackTrace();
               getServletContext().log("Error: " + e.getMessage());
private String getFileName (String courseID, JDBCHelper dbHelper)
throws ClassNotFoundException, SQLException
          ResultSet results = null;
          String fileName = null;
String sqlQuery = "SELECT CourseFile" +
                              " FROM Course" +
                              " WHERE Course_ID = " + Integer.parseInt (courseID) + ";";
results = dbHelper.doQuery (sqlQuery);
          if (results.next()) {
               fileName = results.getString (1);
          else {
//need to do more than this :)
               System.out.println("crap");
results.close();
return fileName;
private void loadCourseData()
throws IOException, ClassNotFoundException
//load serialized course data
File file = new File (GlobalData.DataFileName);
if (! file.exists()) {
//error
throw new FileNotFoundException (GlobalData.DataFileName + " not found.");
FileInputStream fis = new FileInputStream (GlobalData.DataFileName);
ObjectInputStream ois = new ObjectInputStream (fis);
_courseHash = (Hashtable) ois.readObject();
ois.close();
private void sendProfileError (ServletOutputStream out)
String html = "<html>\n" +
"<body>\n" +
"<p>An error has occurred with your profile. Please " +
"<a href=\"\" onClick=\"top.restart(); return true\">login again</a>" +
"</body>\n" +
"</html>\n";
PrintWriter writer = new PrintWriter (out);
writer.write (html);
writer.flush();
writer.close();
private Connection _jdbcConnection;
private Hashtable _courseHash;

I know that is where my error is, but why and where is
the script calling it up way?You wrote it right? check out the sendAU() method, there is line
String newFileName = file.getParent() + "\\" + au.getLaunchParams();

Chn.util not found?

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