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The Wizard is a nested UI-focused structure. The outer-most layer is the WizardContainer a class that extends JPanel, and can therefore be inserted into any other Swing widget (such as a JDialog or JFrame). WizardContainer contains the four buttons (“< Prev” “Next >” “Finish” and “Cancel”) and a PageTemplate.

PageTemplate is another JPanel class that can be customized to add wrapper widgets around the actual wizard dialog content. The default PageTemplate does nothing but show the specified WizardPagees. This default PageTemplate (DefaultPageTemplate) can be nested in custom PageTemplates to easily reuse the logic needed to flip between pages when adding wrapper content.