Why Don\'t Look and Feel Changes Apply to New JTabbedPane Tabs in Swing?

Look and Feel Updates in Swing JTabbedPane After Tab Addition

Issue: When adding a new tab to a JTabbedPane in a Swing application, the look and feel changes made through the application menu do not apply to the new tab.

Solution:

To ensure that the look and feel updates in the JTabbedPane, including new tabs, use the following extended approach derived from @Andrew's comments:

    int index = combo.getSelectedIndex();
    try {
        UIManager.setLookAndFeel(
            available[index].getClassName());

        // Update UI for all windows including JTabbedPane
        Window windows[] = Frame.getWindows();
        for(Window window : windows) {
            SwingUtilities.updateComponentTreeUI(window);
        }
    } catch (Exception e) {
        e.printStackTrace(System.err);
    }

In addition to updating the look and feel for individual components, this approach iterates through all open windows in the application and refreshes their UI components, ensuring that any newly created JTabbedPane tabs also receive the updated look and feel.

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