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The beans shown in the previous section were all examples of beans with a visual interface. All Java components, such as applets and buttons, are beans and any subclass may be a bean with a visual interface.
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Other Java classes may also be beans. Without a visual interface, they don't show in a builder tool such as the Beanbox, but they may have methods that are useful to be linked from other beans.
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The builder tool uses introspection to analyze the names of the methods of a class to determine its properties, methods, and events in order to be used as a bean.
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