How can I detect japanese text in a Java string?

Question

I need to be able to detect Japanese characters in a Java string.

Currently I'm getting the UnicodeBlock and checking to see if it's equal to Character.UnicodeBlock.KATAKANA or Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS, but I'm not 100% that's going to cover everything.

Any suggestions?

Answer 1

According regular-expressions.info, Japanese isn't made of one script: "There is no Japanese Unicode script. Instead, Unicode offers the Hiragana, Katakana, Han and Latin scripts that Japanese documents are usually composed of."

In which case, this regex should do the trick:

yourString.matches("[\\p{Hiragana}\\p{Katakana}\\p{Han}\\p{Latin}]*+")