How to classify Japanese characters as either kanji or kana?

Question

Given the text below, how can I classify each character as kana or kanji?

誰か確認上記これらのフ

To get some thing like this

誰 - kanji
か - kana
確 - kanji
認          


        

Answer 1

Use a table like this one to determine which unicode values are used for katakana and kanji, then you can simply cast the character to an int and check where it belongs, something like

int val = (int)て;
if (val >= 0x3040 && val <= 0x309f)
  return KATAKANA
..