JTree Behavior on Windows as opposed to other OSs

Question

I have been noticing something very strange. I have written my code and compiled the code on Mac OS X (10.3). After having compiled the code, I find that all runs well. I take the same code, in a jar file and run this on Linux, Unix, etc... within a 1.4.2_x and a 1.5.x environment, and everything works fine. The problem, is when executing my code on Windows, I get an IllegalStateException error, node doesn't allow children. Why is this? Is there a better way of doing this?
Thanks,
M2bright
Scenario:
I have a blank JTree. I am then adding nodes dynamically to the JTree based off of user input. If the JTree is blank, I add it to the root node. The actual code that is failing is as follows:
  //Previous code for setup and manipulation is before this
// comp is a variable being passed in to the function.
if(((DefaultMutableTreeNode)((JTree)comp).getModel().getRoot()).getChildCount() == 0)
//This is the section where I make sure the root node allows children, works in every OS but windows.                 
((DefaultMutableTreeNode)((JTree)comp).getModel().getRoot()).setAllowsChildren(true);
                    DefaultMutableTreeNode defaultmutabletreenode = new DefaultMutableTreeNode(((DBEntry)obj).getVolume()); // getVolume() returns a string
                    DefaultMutableTreeNode defaultmutabletreenode2 = new DefaultMutableTreeNode(((DBEntry)obj).getBookShort()); //getBookShort() returns a string
                    DefaultMutableTreeNode defaultmutabletreenode4 = new DefaultMutableTreeNode(obj); //obj is a personallized object yet, has a toString()
                    defaultmutabletreenode2.add(defaultmutabletreenode4);
                    defaultmutabletreenode.add(defaultmutabletreenode2);
                    ((DefaultMutableTreeNode)((JTree)obj2).getModel().getRoot()).add(defaultmutabletreenode);
                    ((JTree)obj2).scrollPathToVisible(new TreePath(defaultmutabletreenode4.getPath()));
  //End Snippet

Answer 1

Select Tools / Options and remove the check for 'Open new windows in a new tab instead'