Extract Superclass Dialog
In this text box, type the name for the new superclass.
Package for new superclass
In this drop-down list, specify the package for the new superclass. If necessary, click Browse and choose the target package in the dialog that opens.
Members to Form Superclass
In this area, specify the members of the class to be moved or delegated to the new superclass. To have an element included in the interface, select the checkbox next to it.