A few key points: you should use a JTextPane for the flash-card content so you can use HTML to format the rendered text.
一些关键点：应该使用一个JTextPane来显示flash - card的内容，以便使用html来格式化所呈现的文本。
HTMLDocumentEditor's source code is readable and easy to grasp, and a quick inspection of it reveals that the text area is a JTextPane.
HTMLDocumentEditor的源码可读且易于掌握，快速检查该源码后发现文本区域是一个JTextPane。
HTMLDocumentEditor's source code is readable and easy to grasp, and a quick inspection of it reveals that the text area is a JTextPane.
HTMLDocumentEditor的源码可读且易于掌握，快速检查该源码后发现文本区域是一个JTextPane。
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