How can i refresh a jtree using DefaultMutableTreeNode?

Question

I already create a jtree using DefaultMutableTreeNode, and i also could implement to it the addMouseListener to do a action when the user press every node......Also i used the following instruction to remove all nodes: root_tree.removeAllChildren(); and it instruction remove all the nodes....but when i :
fill the tree
compile my program
i see the tree in my jpanel....it is Ok!
now.....
fill the tree
remove the tree
compile my program
i see only the root (this i wish) it is Ok!
But now i would like that after that i press a combo element (in the actionperformed method):
remove the tree
fill the three with the new nodes
show the tree
But my tree always is the same :(......is like it to need a repaint ....but i already implement it...but i obtain the same result.....
Do somebody have any suggestion...or idea how i can do a refresh in my jtree?....
Anybody could help me please?
Thanks in advance.....
Mary

Answer 1

Construct your tree like this:DefaultMutableTreeNode rootNode = xxx;
DefaultTreeModel model = new DefaultTreeModel( rootNode );
JTree tree = new JTree( model );When you update the root node, just tell the model to fire the appropriate change event by doing this:model.reload( rootNode );or this:model.nodeStructureChanged( rootNode );or this:model.setRoot( rootNode )