Uses of Class
javax.swing.JOptionPane

Packages that use JOptionPane 
Package Description
javax.swing.plaf
Provides one interface and many abstract classes that Swing uses to provide its pluggable look-and-feel capabilities.
javax.swing.plaf.basic
Provides user interface objects built according to the Basic look and feel.
javax.swing.plaf.multi
Provides user interface objects that combine two or more look and feels.