Simple components, such as JButton and JTextField, use one constant.
简单的组件，例如JButton和JTextField，使用一个常量。
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。
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
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。
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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