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Java Forum / General / July 2007How to identify cyrillic characters in String?
Hi everyone, How can I identfiy my string contains cyrillic characters? Whether my String has cyrillic characters in it? Thanks in advance :) > Hi everyone, > > How can I identfiy my string contains cyrillic characters? > Whether my String has cyrillic characters in it? > > Thanks in advance :) I know it's a little weird, but you might iterate through your string, testing each character, using something like this: boolean isCyrillic(char c) { return Character.UnicodeBlock.CYRILLIC.equals(Character.UnicodeBlock.of(c)); } Perhaps not the most efficient, but you don't have to recreate and maintain parts of the Unicode character database this way. Thanks a lot karl !! This will help. :) > Thanks a lot karl !! > This will help. :) Excuse me, I'm just curious, as to why one would need this. Recognizing only cyrillic, but e.g. not chinese,etc. Does cyrillic include both greek and russian? If it's about language specifics, would you also recognize e.g. "greeklish" (greek written with roman letters, like 'ellhnika') ? Please help me widen my horizon. Andreas Leitgeb schrieb: > Excuse me, I'm just curious, as to why one would need > this. Recognizing only cyrillic, but e.g. not chinese,etc. > Does cyrillic include both greek and russian? No, Cyrillic ist just Cyrillic, and has nothing to do with Greek characters. The Cyrillic characters are '\u0400' to '\u04FF'. The Greek characters are '\u0370' to '\u03FF'. However, the 'A' in Latin, Greek, Cyrillic look all the same, although they are 3 different characters ('\0041', '\u0391', '\u0410'). It seems you confuse character ranges (like Cyrillic) with languages (like Russian, Bulgarian, Serbian) which use these characters. May be the confusion arises because there is only one language in the world (the Greek language) which uses Greek characters. > If it's about language specifics, would you also > recognize e.g. "greeklish" (greek written with roman > letters, like 'ellhnika') ? Recognizing "greeklish" is a completely different story (probably much more difficult). > Please help me widen my horizon.  SignatureThomas >> Excuse me, I'm just curious, as to why one would need >> this. Recognizing only cyrillic, but e.g. not chinese,etc. >> Does cyrillic include both greek and russian? > No, Cyrillic ist just Cyrillic, and has nothing to do with Greek > characters. I think there is a misunderstanding... Greek and Russian character sets are generally referred to as "cyrillic", and so are the scripts of some more countries (you named serbia, yourself), whose people use a script whose "R" looks like a latin "P" (*) >> Please help me widen my horizon. Now that it's clear that you mean the subset of unicode chars used for russian language, I'd still, and out of pure curiosity, like to know, what difference it makes in your application, if a user types russian letters as opposed to whether he's writing chinese, vietnamese, X-hosa, accented latin letters or just plain us-latin. ... unless of course, if telling me that would conflict with any non disclosure agreements... (*): yes, I'm aware that this is not a language science worthy definition of cyrillic scripts :-) >>> Excuse me, I'm just curious, as to why one would need >>> this. Recognizing only cyrillic, but e.g. not chinese,etc. [quoted text clipped - 4 lines] >I think there is a misunderstanding... Greek and Russian >character sets are generally referred to as "cyrillic", By whom? I can see the Russian alphabet being referred to as Greek or Hellenic as it is derived mostly from Greek, but I've never heard of the Greek alphabet referred to as Cyrillic. That would be like referring to the Latin alphabet as Turkic. Alan SignatureDefendit numerus >>>> Excuse me, I'm just curious, as to why one would need >>>> this. Recognizing only cyrillic, but e.g. not chinese,etc. [quoted text clipped - 5 lines] > By whom? I can see the Russian alphabet being referred to as > Greek or Hellenic as it is derived mostly from Greek, ... So it's two to one in this thread... I'll do some research on what "cyrillic" really is. Maybe I'm wrong, afterall. You know, there's always things that one believes one knows for sure, and many years later one might find out it was wrong all the time... Whether greek has got anything to do with cyrillic wasn't really my point... Anyway I'd like to get to know any reason why one would try to detect characters of any particular alphabet in a user's input. What difference in applications behaviour would such a detection reasonably trigger? >>>>> Excuse me, I'm just curious, as to why one would need >>>>> this. Recognizing only cyrillic, but e.g. not chinese,etc. [quoted text clipped - 8 lines] > So it's two to one in this thread... > I'll do some research on what "cyrillic" really is. The Cyrillic alphabet is the alphabet used for Russian, Serbian, Bulgarian, Ukrainian, Belorus, and some other East Slavic languages, plus some non-Slavic languages in the traditional area of Russian hegemony. The Greek alphabet is something different. The Cyrillic alphabet is named for St. Cyril, who, along with his brother, St. Methodius, first brought Christianity to the Slavs. SignatureJohn W. Kennedy "The first effect of not believing in God is to believe in anything...." -- Emile Cammaerts, "The Laughing Prophet" > [ about cyrill and his script ] fine, learnt a thing. Still I'm eager to learn about possible reasons to determine existence of any particular script within a user's input, as the original poster wanted to do. 1:4 :) No, Greek alphabet is never called "Cyrillic" -- Regards, Paul Gorodyansky "Cyrillic (Russian): instructions for Windows and Internet": http://RusWin.net > 1:4 :) > No, Greek alphabet is never called "Cyrillic" No, that's only 1:3.5, for the incredible lateness of that posting. :-p >How can I identfiy my string contains cyrillic characters? >Whether my String has cyrillic characters in it? see http://mindprod.com/jgloss/unicode.html You will likely discover the range 0x400 .. 0x4ff covers the basic chars. (there are two other ranges) So you can write isCyrillic = ( 0x400 <= c && c <= 0x4ff ); -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. 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