문자열 한줄씩 읽기

방법 1.

BufferedReader reader = new BufferedReader(new StringReader(<string>));
reader.readLine();

방법2.

String[] lines = string.split(System.getProperty("line.separator"));

기타 1. (콘솔로 한줄씩 입력받을 때)

Scanner scanner = new Scanner(System.in);
while (scanner.hasNextLine()) {
  String line = scanner.nextLine();
  // process the line
}
scanner.close();