JTree problem

[Krithika Beri]

I have an option to browse multiple files. When i browse for a xml file, it appears in jtree form in the pane. When i click on the 2nd opened tree, it is showing the 1st opened tree.

	public void actionPerformed(ActionEvent e) {
		if (e.getSource() == browse) {
			JFileChooser chooser = new JFileChooser();
			chooser.showOpenDialog(null);
			File file = chooser.getSelectedFile();
			if (!((DefaultListModel) arr).isEmpty()) {
				int optionType = JOptionPane.YES_NO_OPTION; // YES+NO
				int res = JOptionPane.showConfirmDialog(null,
						"Do you want to save changes made?", "Message ",
						optionType);

				if (res == 0) {
					JFileChooser chooser1 = new JFileChooser();
					chooser1.showSaveDialog(null);
					File f = chooser1.getSelectedFile();
					String filesavexml = f.getAbsolutePath();

					try {
						xmlTree.save(filesavexml);
					} catch (Exception e1) {

						// Auto-generated catch block
						e1.printStackTrace();
					}

					// testFileName=filename;
				}
			}
			filename = file.getPath();
			System.out.println("You have selected: in browse" + filename);

			if (!filename.isEmpty()) {

				try {
					tree = new XMLTree(filename);
					tree.setRowHeight(20);
					new TreeDragAndDrop(tree);
					((DefaultListModel) arr).addElement(filename);
					list.addListSelectionListener(listSelectionListener);
					Tpane = new JScrollPane(tree);
					pane2.add(Tpane);
					Tpane.setBounds(0, 20, 800, 480);
					tree.addTreeSelectionListener(createSelectionListener());
					tree.setBounds(0, 0, 300, 300);
					new Icons(tree);
					Tpane.setFocusable(true);

				} catch (IOException ioe) {
					System.out.println("Error creating tree: " + ioe);
				}
			}}

[Ranganathan Kaliyur Mannar]

I am not able to understand anything about this problem. Nor does the code explain anything.
You need to TellTheDetails.

you say multiple files, so are you showing each file in a separate tab? does each of this tab show a tree?

[Krithika Beri]

I've got only one pane and in that pane only the JTree is displayed. When i browse for a new file, the old tree is to be replaced by the new tree. The first "browse" method is the ActionListener when you want to browse for a new file. I want to know what probably could be the cause for this error. I think you can ignore the list selection listener that i put there.

[Ranganathan Kaliyur Mannar]

Ok. I see that you add the JScollPane (that has the JTree) to a JPanel named pane2 (I assume pane2 is a JPanel as you have not provided that info).
If so, what is the LayoutManager used for that JPanel? You are adding a new JScrollPane. What about the old one. Should you not remove it first?

Also, why are you using setBounds? I don't think it is needed. Ideally, you should have this pane2 use a BorderLayout with the JScollPane added to the center.
In fact, you should update the tree's model rather than create a new JTree everytime.

[Krithika Beri]

I only declared the scroll pane earlier, did not initialize it. I am re-initializing it every time. I have a JPanel and in that many other components like a list, tables etc. The tree is a part of it