Re: [TM4J-users] question about topic map in JSP

[Lars H. <he...@se...>]

Hi =D6=DC=CD=A4,

> Hello,
>   I have written a program with TMAPI which runs correct in the Java
> environment,but when I want to display my topic map in my browser and i=
ntend
> to use JSP to realize it, it failed. I don't know why and can you help =
me?My
> JSP code is in the accessory.
[...]

Your code:
   Topic topic=3Dnull;
   topic.createTopicName("chapter",null);
   Iterator it =3D topic.getTopicNames().iterator();
   TopicName tn=3D (TopicName)it.next();
   out.println(tn.getValue());

cannot work. Regardless of the environment. The code MUST produce a
NullpointerException, because of the first two lines

   Topic topic =3D null;
   topic.createTopicName("chapter", null);

This should work:

   Topic topic =3D topicMap.createTopic();
   topic.createTopicName("chapter", null);

The topicMap must be initialized, of course.

Best regards,
Lars
--=20
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