関連ワード:  java get last 4 characters of string    java get last 4 chars of string    java code to get last 4 characters of string    java last 4 characters of string    java get first 4 characters of string    java replace last 4 characters of string    get only last 4 characters of string java    java substring last 4 characters  
結果 : java get last 4 characters of string