How can I view the newly added node in a JTree

Question

Hi! I have a problem with my project. I set up a JTree. At first it has a node that contains FARInfo object. When I click this node, the other program in the package will pop up a form to let user input and submit, then it will add a new node into the other node. The new node will contain FilledInfo object. But I cannot view this newly added node. The source code related with the 2 different object is as following:
tree.addTreeSelectionListener( new TreeSelectionListener()
public void valueChanged(TreeSelectionEvent e4)
DefaultMutableTreeNode node = ( DefaultMutableTreeNode )
(tree.getLastSelectedPathComponent ());
Object nodeInfo = node.getUserObject();
if (node.isLeaf())
if ( nodeInfo instanceof FARInfo )
FARInfo category = (FARInfo) nodeInfo;
displayURL ( category.categoryURL );
displayForm ( category.farFormName );
if ( DEBUG )
System.out.print ( category.categoryURL + ":\n" );
else if ( nodeInfo instanceof FilledInfo )
     FilledInfo category2 = ( FilledInfo ) nodeInfo;      
     displayFilledForm ( category2.num );
}else
return;
My question is: how to deal with the nodes containing 2 different objects: FARInfo and FilledInfo? FilledInfo is created by the other program in the package. Thanks for your help!

Answer 1

I used insertNodeInto() to inser a new node into the tree, and it can be displayed. But when I used addTreeSelectionListener() to click on the newly added node, it cann not reaspond the click. Following is my original addTreeSelectionListener(). You see, if you click a node of FARInfo, then it will open a form, and after user filled in and submit it, a new node will be added into the Jtree. If you click a node of FilledInfo, then the user should view the content of this new node. But now, it seems that the sencond click cannot work. Thanks for your help.
tree.addTreeSelectionListener( new TreeSelectionListener()
public void valueChanged(TreeSelectionEvent e4)
DefaultMutableTreeNode node = ( DefaultMutableTreeNode )
(tree.getLastSelectedPathComponent ());
Object nodeInfo = node.getUserObject();
if (node.isLeaf())
if ( nodeInfo instanceof FARInfo )
FARInfo category = (FARInfo) nodeInfo;
displayURL ( category.categoryURL );
displayForm ( category.farFormName );
if ( DEBUG )
System.out.print ( category.categoryURL + ":\n" );
else if ( nodeInfo instanceof FilledInfo )
FilledInfo category2 = ( FilledInfo ) nodeInfo;
displayFilledForm ( category2.num );
}else
return;