You need to override this method after calling super.updateDisplayList() if you're creating a custom layout, and then substitute the desired logic.

如果您正在创建定制布局，那么需要在调用 super.updateDisplayList() 之后覆盖该方法，然后替换为希望使用的逻辑。

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After you add the documents to the index, don't forget to close the index by calling this method, which guarantees that the index changes are written to the disk.

当我们把文档添加到索引中后，不要忘记关闭索引，这样才保证Lucene把添加的文档写回到硬盘上。下面的一句代码演示了如何关闭索引。

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