Components make up all the elements of a program's user interface, including windows, dialog boxes, panels and panes, menus, buttons, labels, sliders, text fields, and so on.
For more information about using Swing components, see "The JFC Swing Tutorial"
at http://java.sun.com/docs/books/tutorial/uiswing/index.html
Follow these links for information about how to add and modify components in the Form Editor:
Component Palette
Adding a New Component
Selecting Components
Moving or Copying a Component
Reordering Components Within a Container
Editing Component Properties
Using the Connection Wizard
Creating a Menu