Swing is a very large subsystem and makes use of many packages. These are the packages used by Swing that are defined by Java SE 6. The main package is javax.swing. This package must be imported into any program that uses Swing. It contains the classes that implement the basic Swing components, such as push buttons, labels, and check boxes.

 

Java Swing Class Hierarchy:

The class JComponent, descended directly from Container, is the root class for most of Swing’s user interface components.

 

 

Swing contains components that you’ll use to build a GUI. I am listing you some of the commonly used Swing components. To learn and understand these swing programs, AWT Programming knowledge is not required.