问题
I need a matcher like this:
Matcher kuchen = Pattern.compile("gibt es Kuchen in der K\u00FCche",Pattern.CASE_INSENSITIVE).matcher("");
and the problem is that it is not simple ASCII. I know that in this particular case I could use [\u00FC\u00DC] for the ü, but I need to be a bit more general (building the regex from other matcher groups). So according to javadocs:
By default, case-insensitive matching assumes that only characters in the US-ASCII charset are being matched. Unicode-aware case-insensitive matching can be enabled by specifying the UNICODE_CASE flag in conjunction with this flag.
Can anybody tell me how to specify the two flags in conjunction?
回答1:
Try
Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE
it should solve the issue. Or-ing the bitmask you will get compound features.
回答2:
Though more pure using parameters, same as "(?iu)gibt es ..." without parameters. i = case-insensitive, u = unicode.
回答3:
Use bitwise OR, like Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE.
回答4:
It's a bitmask, so you use the bitwise OR operator |.
来源：https://stackoverflow.com/questions/18332117/set-two-flags-in-java-regex-pattern