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String regEx="a|f"; //±íʾa»òf
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boolean rs=m.find();
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String str="c:\dir1\dir2\name.txt";
Pattern p=Pattern.compile(regEx);
Matcher m=p.matcher(str);
boolean rs=m.find();
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System.out.println(m.group(i));
}
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String regEx="::";
Pattern p=Pattern.compile(regEx);
String[] r=p.split("xd::abc::cde");
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String regEx="a+"; //±íʾһ¸ö»ò¶à¸öa
Pattern p=Pattern.compile(regEx);
Matcher m=p.matcher("aaabbced a ccdeaa");
String s=m.replaceAll("A");
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String s=m.replaceAll("");
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