関連ワード:  java change first character of string to uppercase    java change first character of string    java convert first character of string to lowercase    java replace first character of string    java replace first char of string    java replace first 4 characters of string    java replace first and last character of string    java convert first character in string to uppercase    replace first letter of string java    java string change first character lowercase  
結果 : java change first character of string