An IEEE 754 64bit floating point number. A Float
is
capable of approximately representing numeric values
between:
Zero is represented by distinct instances +0.0
, 0.0
,
but these instances are equal.
In addition, the following special values exist:
infinity
and infinity
, andAs required by the IEEE standard, an undefined value, often
denoted NaN, is not equal to any other value, nor even
to itself. Thus, the definition of equals()
for Float
violates the general contract defined by Object.equals()
.
A floating point value with a zero fractionalPart
is
considered equal to its integer
part.
Literal floating point values are written with a decimal point and, optionally, a magnitude or exponent:
1.0 1.0E6 1.0M 1.0E6 1.0u
In the case of a fractional magnitude, the decimal point is optional. Underscores may be used to group digits into groups of three.
parseFloat()
no subtypes hierarchy
Initializer 
Float(Float float) 
Attributes  
finite  Source Codeshared Boolean finite 
fractionalPart  Source Codeshared actual Float fractionalPart The fractional part of this number, after truncation of
the integral part. For Refines Number.fractionalPart 
hash  Source Codeshared actual Integer hash The hash value of the value, which allows the value to be an element of a hashbased set or key of a hashbased map. Implementations must respect the constraint that:
Therefore, a class which refines Refines Object.hash 
infinite  Source Codeshared Boolean infinite 
integer  Source Codeshared Integer integer This value, represented as an Throws

magnitude  Source Codeshared actual Float magnitude The magnitude of this number, defined for any instance
where
Refines Number.magnitude 
negated  Source Codeshared actual Float negated The additive inverse of this value. Refines Invertible.negated 
negative  Source Codeshared actual Boolean negative Determines if this value is a negative number or
Refines Number.negative 
positive  Source Codeshared actual Boolean positive Determines if this value is a positive number or
Refines Number.positive 
sign  Source Codeshared actual Integer sign The sign of this value. Produces Refines Number.sign 
strictlyNegative  Source Codeshared Boolean strictlyNegative Determines if this value is a negative number, 
strictlyPositive  Source Codeshared Boolean strictlyPositive Determines if this value is a positive number, 
string  Source Codeshared actual String string A developerfriendly string representing the instance.
Concatenates the name of the concrete class of the
instance with the Refines Object.string 
undefined  Source Codeshared Boolean undefined Determines whether this value is undefined (that is,
Not a Number or NaN). The undefined value has the
property that it is not equal ( 
wholePart  Source Codeshared actual Float wholePart The integral value of the number after truncation of
the fractional part. For Refines Number.wholePart 
Inherited Attributes 
Attributes inherited from: Invertible<Other> 
Attributes inherited from: Number<Other> 
Methods  
compare  Source Codeshared actual Comparison compare(Float other) Compares this value with the given value. Implementations must respect the constraints that:
Refines Comparable.compare 
divided  Source Codeshared actual Float divided(Float other) The quotient obtained by dividing this number by the given number. For integral numeric types, this operation results in a remainder. When the given number is Refines Numeric.divided 
equals  Source Codeshared actual Boolean equals(Object that) Determines if the given object is equal to this
Or if:
Refines Object.equals 
largerThan  Source Codeshared actual Boolean largerThan(Float other) Determines if this value is strictly larger than the given value. Refines Comparable.largerThan 
minus  Source Codeshared actual Float minus(Float other) The difference between this number and the given
number. Must produce the value Refines Invertible.minus 
notLargerThan  Source Codeshared actual Boolean notLargerThan(Float other) Determines if this value is smaller than or equal to the given value. Refines Comparable.notLargerThan 
notSmallerThan  Source Codeshared actual Boolean notSmallerThan(Float other) Determines if this value is larger than or equal to the given value. Refines Comparable.notSmallerThan 
plus  Source Codeshared actual Float plus(Float other) The result of adding the given value to this value. This operation should never perform any kind of mutation upon either the receiving value or the argument value. Refines Summable.plus 
plusInteger  Source Codeshared actual Float plusInteger(Integer integer) The result of adding this number to the given
Refines Number.plusInteger 
power  Source Codeshared actual Float power(Float other) The result of raising this number to the given power. Refines Exponentiable.power 
powerOfInteger  Source Codeshared actual Float powerOfInteger(Integer integer) The result of raising this number to the given
nonnegative Refines Number.powerOfInteger 
smallerThan  Source Codeshared actual Boolean smallerThan(Float other) Determines if this value is strictly smaller than the given value. Refines Comparable.smallerThan 
times  Source Codeshared actual Float times(Float other) The product of this number and the given number. Refines Numeric.times 
timesInteger  Source Codeshared actual Float timesInteger(Integer integer) The result of multiplying this number by the given
Refines Number.timesInteger 
Inherited Methods 
Methods inherited from: Comparable<Other> 
Methods inherited from: Exponentiable<This,Other> 
Methods inherited from: Invertible<Other> 
Methods inherited from: Number<Other> 
Methods inherited from: Numeric<Other> 
Methods inherited from: Summable<Other> 