use StringUtils , this is not a well-known apache library. This solves your problem.
replaceUmlauts public static java.lang.String replaceUmlauts(java.lang.String string) Replaces all umlauts in a string. Umlaut Replacement รค ae รถ oe รผ ue ร ss Parameters: string - String, where the umlauts has to be replaced Returns: String without umlauts
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