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cannot activate a web application with database

Cathy Valdez
Greenhorn

Joined: Oct 22, 2003
Posts: 23
The topic is Integrating a Web Application With a Database
Below are softwares installed in my PC:
OS=Windows98
Tomcat v. 4.1.27.exe
J2SE/JDK v. 1.3.1
mysql
mysql-connector-java

Below is the content of Autoexec.bat:

Compilation of servlet files below were successful.
InitializeConnectionPool.java
ScrambleGameServlet.java
NamingService.java
ScrambleGameService.java
Word.java
WordCategory.java
WordCategoryDAO.java
WordCategoryService.java
WordDAO.java

Below is the content of the deployment descriptor -web.xml:

The database wordgames above is located at the directory below:

Below are files inside the directory above:
wordcategory.frm
wordcategory.MYI
wordcategory.MYD
word.frm
word.MYI
word.MYD
wordhint.frm
wordhint.MYI
wordhint.MYD

To activate the Scramble Game Servlet, using a Web Browser, I entered the URL below:

Below is the displayed page form for the URL above:
Duke's Arcade
Select from one of the following games:

Word Scramble
When I clicked the Word Scramble above, errors below occured:

What do errors above mean? What should I do to correct those errors so to run this Web application with database in my PC? Can anybody there help?
Any suggestions would greatly be appreciated.
Thanks in advance.
Regards,
Cathy
Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 61652
    
  67

Please do not cross-post the same question in multiple forums.
bear


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Jamie Robertson
Ranch Hand

Joined: Jul 09, 2001
Posts: 1879

Originally posted by Bear Bibeault:
Please do not cross-post the same question in multiple forums.
bear
This is probably best suited for the servlet forum, but this is what I can make of it:
sl314.web.ScrambleGameServlet.showCategories(ScrambleGameServlet.java:54)
- looks like a problem at line 54 of the showCategories method in your SCrambleGameServlet class.
root cause java.lang.NullPointerException
- looks like you used an object without initializing it.

To fix: go to line 54 in the affected object, and find out where it missed being initialized. When you find where it should have been initialized, initialize it!
Nothing to do with JDBC though
Jamie
 
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subject: cannot activate a web application with database