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DefaultTreeModel & JTree

Lars Dold
Greenhorn

Joined: Apr 09, 2010
Posts: 9
Hello,

I have a curios problem with a JTree.
When I use my own extended class for the TreeModel the Tree would not be filled, if I use the DefaultTreeModel directly it works.
What do I make wrong with my own TreeModel?

My TreeModel:

Call in the UI Class:
This don' t work:


This work:


I thought that when I extend my class with the DefaultTreeModel I will Inheritance all the function of superClass. Did I miss something?

Thank you very much

kind regards

Lars
Christophe Verré
Sheriff

Joined: Nov 24, 2005
Posts: 14687
    
  16

Is it just me or you're not using TreeViewModelNew at all ? Just a typo ?


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Lars Dold
Greenhorn

Joined: Apr 09, 2010
Posts: 9
Hello,

ups this was a copy and past failure, in eclipse my class is correct, I edit the posting above.
There is no failure message, just a empty JTree, when I use childcount in my TreeViewModel, it shows me an count of 1, but nothing in the JTree,

kind regards

Lars
Christophe Verré
Sheriff

Joined: Nov 24, 2005
Posts: 14687
    
  16

Shouldn't you add the new node to the root of the tree ?
Lars Dold
Greenhorn

Joined: Apr 09, 2010
Posts: 9
Hello Christophe,

thank you very much for your fast help, this was the Point:

ptNode = new DefaultMutableTreeNode(root);

The failure was not to use the original root variable, the new created variable ptNode is different to the original root variable,

kind regards

Lars
 
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