Touring Language APIs - Beginning Java 7 - page 326

• Double(String s) converts s 's text to a double precision floating-point
value and stores this value in the Double object.
Float 's constructors are complemented by float floatValue() , which re-
turns the wrapped floating-point value. Similarly, Double 's constructors are comple-
mented by double doubleValue() , which returns the wrapped double precision
floating-point value.
Float declaresseveralutilitymethodsaswellas floatValue() .Thesemethods
include the following:
• static int floatToIntBits(float value) converts value toa
32-bit integer.
• static boolean isInfinite(float f) returnstruewhen f 'svalue
is+infinityor-infinity.Arelated boolean isInfinite() methodreturns
true when the current Float object's value is +infinity or -infinity.
• static boolean isNaN(float f) returnstruewhen f 'svalueisNaN.
Arelated boolean isNaN() methodreturnstruewhenthecurrent Float
object's value is NaN.
• static float parseFloat(String s) parses s , returning the
floating-pointequivalentof s 'stextualrepresentationofafloating-pointvalue,
orthrowing NumberFormatException whenthisrepresentationisinvalid
(contains letters, for example).
Double declaresseveralutilitymethodsaswellas doubleValue() .Thesemeth-
ods include the following:
• static long doubleToLongBits(double value) converts value
to a long integer.
• static boolean isInfinite(double d) returnstruewhen d 'svalue
is+infinityor-infinity.Arelated boolean isInfinite() methodreturns
true when the current Double object's value is +infinity or -infinity.
• static boolean isNaN(double d) returns true when d 's value is
NaN. A related boolean isNaN() method returns true when the current
Double object's value is NaN.
• static double parseDouble(String s) parses s , returning the
double precision floating-point equivalent of s 's textual representation of a
double precision floating-point value, or throwing NumberFormatExcep-
tion when this representation is invalid.