Since the JDK includes a regular expression library, I don't anticipate any difficulties with this class.
因为JDK包含正则表达式库，所以我想实现这个类不会有任何困难。
The following operators are provided for compatibility with the GNU regular expression library.
下列操作符与GNU正则表达式库兼容。
The following operators are provided for compatibility with the GNU regular expression library.
下列操作符与GNU正则表达式库兼容。
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