public SelectableTree() {
super("JTree Selections");
WindowUtilities.setNativeLookAndFeel();
addWindowListener(new ExitListener());
Container content = getContentPane();
String[] namesplitStrings = mainDir.toString().split("\\\\");
String filename = namesplitStrings[namesplitStrings.length - 1];
DefaultMutableTreeNode root = new DefaultMutableTreeNode(filename);
addChildren(root, mainDir);
tree = new JTree(root);
tree.addTreeSelectionListener(this);
content.add(new JScrollPane(tree), BorderLayout.CENTER);
currentSelectionField = new JTextField("Current Selection: NONE");
content.add(currentSelectionField, BorderLayout.SOUTH);
setSize(250, 275);
setVisible(true);
}