* 사용 언어 : C++

String str("abcdef");
String str2("abcb");
String str3("        aB c  ");
|| 함수 || 예 ||
|| charAt || str.charAt(3) == 'd' ||
|| compareTo || str2.compareTo("abcb") == 0 ||
|| compareToIgnoreCase || str2.compareTo("AbCb") == 0 ||
|| concat || str.concat(str) == "abcdefabcdef" ||
|| contains || str.contains("bcd") == TRUE ||
|| endsWith || str.endsWith("ef") == TRUE ||
|| startsWith || str.startsWith("abc") == TRUE ||
|| equals || str.equals(new String("abcdef")) == TRUE ||
|| equalsIgnoreCase || str.equalsIgnoreCase(new String("ABcdEf")) == TRUE ||
|| indexOf || str2.indexOf("b") == 1 ||
|| isEmpty || str.isEmpty == FALSE ||
|| lastIndexOf || str2.lastIndexOf("b") == 3 ||
|| length || str.length() == 6 ||
|| replace || str.replace("bc", "ad") == "aaddef" ||
|| split || str.split("c") == {"ab", "def"} ||
|| subString || str.subString(2, 4) == "cde" ||
|| format || String::format("참석자 : %d명", 8) == "참석자 : 8명" ||
|| trim || str3.trim() == "aB c" ||
|| toLower || str3.toLower() == "        ab c  " ||
|| toUpper || str.toUpper() == "ABCDEF" ||
|| valueOf || String::valueOf(3) == "3" ||