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Swing allows an application to specialize the look and feel of widgets by modifying the default (via runtime parameters), deriving from an existing one, by creating one from scratch, or, beginning with J2SE 5.0, by using the skinnablesynth look and feel, which is configured with an XML property file. The look and feel can be changed at runtime.
Platform-dependent look and feels: Look and feels that aim to be the closest as possible to the platform native GUI. The fidelity to the native look-and-feel theming has been improved in recent Java versions by leveraging the platform native GUI theming library when possible
A Windows look and feel (this look and feel depends on the version of the Windows Operating System),