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JTree - expanding nodes

 
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Hello. I can't expand nodes and I don't know why. Here under is the code. It is supposed to create a frame and one tree wrapped in scroll pane, and there should be a button with "expand" written on it. When I click the "expand" button, I expected that tree node will expand, but it doesn't.

One more time, thanks.

 
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The TreePath is incorrect. It's a path with only one element, o2. But it needs the parent as well, and the parent's parent, etc. Change it to the following to work:
 
Petar Thomas
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Thank You one more time.
Petar
 
Rob Spoor
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You're welcome
 
Petar Thomas
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Thank You,

Excuse me,
... I still can't make it to work. I appologize for taking time on such a basic things. I can't solve it. It is too much simple , and I don't know what I did wrong now, I can't really imagine what to do next, and I know that it could take me even days for something so simple. If you can see the code that I have made now, I would be very thankfull, and I appologiye one more time for my lack of knowledge and inspiration.

I have passed an array of Objects to the TreePath constructor, I suppose, and I have passed TreePath object to the expandPath method, but it doesn't expand nothing. I have an output to console, where I can see that I have the right Objects, and ... so I am confused...

I don't know how to thank enough.

 
Petar Thomas
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I have solved my problem for now like this...

(sorry for bothering...)

 
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