Provides user interface objects built according to the Basic look and feel. The Basic look and feel provides default behavior used by many look and feel packages. It contains components, layout managers, events, event listeners, and adapters. You can subclass the classes in this package to create your own customized look and feel.

These classes are designed to be used while the corresponding `LookAndFeel` class has been installed (`UIManager.setLookAndFeel(new XXXLookAndFeel())`). Using them while a different `LookAndFeel` is installed may produce unexpected results, including exceptions. Additionally, changing the `LookAndFeel` maintained by the `UIManager` without updating the corresponding `ComponentUI` of any `JComponent`s may also produce unexpected results, such as the wrong colors showing up, and is generally not encouraged.

Note: Most of the Swing API is not thread safe. For details, see Threads and Swing, a section in The Java Tutorial. @since 1.2 @serial exclude