Java ÕýÔò±í´ïʽ
fm.split("["); // error
-------------------
java.util.regex.PatternSyntaxException: Unclosed character class near index 0[+
^
at java.util.regex.Pattern.error(Unknown Source)
at java.util.regex.Pattern.clazz(Unknown Source)
at java.util.regex.Pattern.clazz(Unknown Source)
===========================
fm.split("\\["); //ok
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