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如何在 Java-8 正則表示式中使用 R
\R 與 Unicode 標準中定義的任何換行符相符
Pattern p = Pattern.compile("\R");
Unicode 換行序列等同於 \u000D\u000A|[\u000A\u000B\u000C\u000D\u0085\u2028\u2029]
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