関連ワード:  java return first character of string    java get first character of string    java get only first character of string    java get first 2 character of string    java get first n characters of string    java get first 3 characters of string    java get first two characters of string    java get first x characters of string    java get first 10 characters of string    java get first 4 characters of string  
結果 : java return first character of string