関連ワード:  java replace first character in string    java replace first char in string    java replace first n characters in string    java replace first two characters in string    java replace first x characters in string    java replace first occurrence of character in string    replace first character in string java to uppercase    java change case of first character in string    java change first character of string to uppercase    java change first character of string  
結果 : java replace first character in string