- charAt : index's text output
- indexOf : text's index output
- .length() : String length
- .getBytes() : String -> Byte
- .replace() : text replace
- .substring() : cut String
- .toLowerCase() : upper -> lower
- .toUpperCase() : lower -> upper
- .trim() : delete empty (delete front & back, but middel not delete)
- String.valueOf() : change String
- .split() : String -> array
- StringTokenizer()
- Ex_ charAt
- Ex_ String compare
- Ex_ indexOf, length()
- Ex_ .getBytes()
- Ex_ .replace()
- Ex_ .substring
- Ex_ .toLowerCase(), .toUpperCase(), .trim()
- Ex_ .split()
- Ex_ StringTokenizer()
25. 컴퓨터학과 졸업 / SQLD, 정보처리기사 취득