Very strange JTextPane behaviour

Question

Hi everybody,
it would be great if someone could help me. The problem I'm facing is the following: I have a small dialog with three tabs. On the third tab there is a JTextPane to receive messages from my program. These messages are posted there by means of an abstract class that only has static methods, sort of a System.out.println() thing, only for my GUI. On the first tab there are some buttons. I have used these to post some messages into the JTextPane.
Now this is what happens:
If I click a button (post a message), and then switch to the third tab everything works fine. If I do the same again, it still works, e.g.:
This is text..
This is text..
This is text..
But if I first click the button a few times and THEN switch to the third tab, then I get the following result:
This is text..This is text..This is text..
This is text..This is text..
This is text..
I have no idea at all. I have looked everywhere, but I can't find anything. Please help me.
Greetings, Mitch

Answer 1

The StyledDocument cl*** does not support an append method, which is quite sad. Here it is ... declare it in your JTextPane subclass
public void appendDocument(String s,AttributeSet attr) {
StyledDocument d = (StyledDocument) getDocument();
try { d.insertString(d.getLength(),s,attr); }
catch (BadLocationException e) {} // will never happen
}Hope, this helps
greetings Marsian