When you're designing a user interface with JTabbedPane, it's not uncommon to specify many tabs.
当您用JTabbedPane设计用户界面时，指定许多选项卡也是很常见的。
For convenience, I begin by creating two local variables to hold the frame's content pane and the JTabbedPane.
为了方便起见，我在开始时就创建了两个局部变量来保存该框架的内容面板以及JTabbedPane。
Some more-complex components, such as the JScrollBar and the JTabbedPane, have multiple constants for their different parts.
有些更复杂的组件，例如JScrollBar和JTabbedPane，则有多个常量，用于不同的部分。
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