String to int / (Integer.parseInt(String s) 문자에서 숫자로 캐스팅

java.lang(package) Integer클래스 parseInt(String s)메소드

• public static int parseInt(String s)
                      throws NumberFormatException

  Parses the string argument as a signed decimal integer. The characters in the string must all be decimal digits, except that the first character may be an ASCII minus sign '-' ('\u002D') to indicate a negative value or an ASCII plus sign '+' ('\u002B') to indicate a positive value. The resulting integer value is returned, exactly as if the argument and the radix 10 were given as arguments to the parseInt(java.lang.String, int) method.

  Parameters:

  s - a String containing the int representation to be parsed

  Returns:

  the integer value represented by the argument in decimal.

  Throws:

  NumberFormatException - if the string does not contain a parsable integer.