parse static method
- String source
source as a double literal and return its value.
Accepts an optional sign (
-) followed by either the characters
"Infinity", the characters "NaN" or a floating-point representation.
A floating-point representation is composed of a mantissa and an optional
exponent part. The mantissa is either a decimal point (
.) followed by a
sequence of (decimal) digits, or a sequence of digits
optionally followed by a decimal point and optionally more digits. The
(optional) exponent part consists of the character "e" or "E", an optional
sign, and one or more digits.
source must not be
Leading and trailing whitespace is ignored.
Throws a FormatException if the
source string is not
a valid double literal.
Rather than throwing and immediately catching the FormatException, instead use tryParse to handle a potential parsing error.
Examples of accepted strings:
"3.14" " 3.14 \xA0" "0." ".0" "-1.e3" "1234E+7" "+.12e-9" "-NaN"
external static double parse(String source);