マップのインクリメント - Qiita

int count = map.containsKey(word) ? map.get(word) : 0;//真なら左、偽なら右0 map.put(word, count + 1); Register as a new user and use Qiita more conveniently You get articles that match your needsYou can efficiently read back useful informationYou can use dark themeWhat you can do with signing up