Monday, September 1, 2003 06:10 AM
If you could post a copy of your code here we might be able to help. The GroupableTableHeaderUI.java is one of those internal Java Classes that handle the Look and Feel of Java. If this is where you are getting the "null pointer" exception, something is happening in your code way up the line to cause this to happen.
When you post your code here (and posts in general), you need to use HTML tags around your code.... Separate paragraphs with a tag... use the tags around your code....
We'd be glad to help. But we need to know some more information. And have you used a debugger to step through your code?