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When I reading an article on wrapper class , I found two interesting question and hope someone could give me the explanation: parseInt("Kona",27) return 411787 parseLong("Hazelunt",36) return 1356099454469L
Hi Calvin This will help you. You can read more about the Integer class here. parseInt public static int parseInt(String s, int radix) throws NumberFormatException Parses the string argument as a signed integer in the radix specified by the second argument. The characters in the string must all be digits of the specified radix (as determined by whether Character.digit(char, int) returns a nonnegative value), except that the first character may be an ASCII minus sign '-' ('\u002D') to indicate a negative value. The resulting integer value is returned. An exception of type NumberFormatException is thrown if any of the following situations occurs: The first argument is null or is a string of length zero. The radix is either smaller than Character.MIN_RADIX or larger than Character.MAX_RADIX. Any character of the string is not a digit of the specified radix, except that the first character may be a minus sign '-' ('\u002D') provided that the string is longer than length 1. The value represented by the string is not a value of type int. Examples: parseInt("0", 10) returns 0 parseInt("473", 10) returns 473 parseInt("-0", 10) returns 0 parseInt("-FF", 16) returns -255 parseInt("1100110", 2) returns 102 parseInt("2147483647", 10) returns 2147483647 parseInt("-2147483648", 10) returns -2147483648 parseInt("2147483648", 10) throws a NumberFormatException parseInt("99", 8) throws a NumberFormatException parseInt("Kona", 10) throws a NumberFormatException parseInt("Kona", 27) returns 411787
Parameters: s - the String containing the integer representation to be parsed radix - the radix to be used while parsing s. Returns: the integer represented by the string argument in the specified radix. Throws: NumberFormatException - if the String does not contain a parsable int.
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