To demonstrate, Listing 3 shows the XML file used to customize the look of a JButton control.

为了演示，清单3显示了用来定制JButton控件外观的XML文件。

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Now, if you try to fetch the last element as a JButton, a class cast exception happens at run time

现在，如果您尝试将最后一个元素作为JButton 来提取，则在运行时会出现一个类转换异常

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AWT and Swing components, such as JButton or JTable, use the Observer pattern to decouple the generation of GUI events from their semantics within a given application.

AWT和Swing组件(例如JButton或JTable)使用观察者模式消除了GUI事件生成与它们在指定应用程序中的语义之间的耦合。

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AWT and Swing components, such as JButton or JTable, use the Observer pattern to decouple the generation of GUI events from their semantics within a given application.

AWT和Swing组件(例如JButton或JTable)使用观察者模式消除了GUI事件生成与它们在指定应用程序中的语义之间的耦合。

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