関連ワード:  java get last 4 characters of string    java get last characters of string    java get last char of string    java get last character of stringbuilder    java get last 3 characters of string    java get last 2 characters of string    java get last n characters of string    java last 4 characters of string    java get last 10 chars of string    java get first 4 characters of string  
結果 : java get last four characters of string