Swing- How do i refresh a JTree? tried using repaint, reload and revalidate methods...

I am working on an swing application that uses JTree component. i am using HashTable to add the elements to the JTree. The data that is to be displayed will be changing when the user clicks on NExt button. To enable this i am clearing the data in hashtable and adding the new data and readding the component to the JTree. the new data is visible only when i minimize the screen and re maximise. can any one suggest me what i should be doing. i can send the code if required.
chinta_vns@yahoo.com
chinta_vnsAsked:
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msterjevCommented:
DefaultTreeModel model=(DefaultTreeModel)tree.getTableModel();
model.reload(node)
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msterjevCommented:
I.E.

You must reload the corresponding node where the items are added or removed! You can reload the root node if the Tree is not very big!
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b612_foreverCommented:
Since you say that it will refresh when you minimise or maximise, I assume that the logic of loading data into JTree is correct and the following is my suggestion.

Add a refresh button and then performed the refresh of JTree by this button.

the code to refresh Jtree may be like this:
MyJTree.revalidate();

If it didn't work properly, try this
MyJTree.setVisible(false);
MyJTree.revalidate();
MyJTree.setVisible(true);

Hope this will help.
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chinta_vnsAuthor Commented:
Thanks for the support. I have tried revalidate, repaint, and reload methods as well. this time i tried to setVisibility to false and then to true. When i try to use
DefaultTreeModel model=(DefaultTreeModel)tree.getTableModel();
model.reload(node)
 it is giving me a compilation error stating that getTableModel() method not found.

Please suggest as the problem persists and is pressing...
Thanks and regards
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msterjevCommented:
Sorry about the error:

  DefaultTreeModel model=(DefaultTreeModel)tree.getModel();
  //model.reload()
  //or
  model.reload(node);
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CleanupPingCommented:
chinta_vns:
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jimmackCommented:
No comment has been added lately, so it's time to clean up this TA.
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