http://ooz.co.kr/298http://leegaworld.tistory.com/8String, StringBuffer 성능 비교 : http://javacan.tistory.com/entry/39StringBuffer, StringBuilder 성능 비교 : http://egloos.zum.com/deblan2/v/419830 http://skynaver.tistory.com/entry/String%EA%B3%BC-StringBuffer%EC%9D%98-%EC%B0%A8%EC%9D%B4%EC%A0%90 String / 불변객체(immutable instance) 예제1 String hello = "Hello";hello += " and how are you?"; String으로 문자열을 합치기..