正则表达式或 Regex (简而言之)是一个定义字符串模式的 API，可用于在 Java 中搜索、操作和编辑字符串 ...
Java’s String class encapsulates an array of bytes. A byte can be converted to a char, in which case, String becomes an array of characters used to compose words, sentences, or any other data you want ...
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