public final class Float extends Number implements Comparable<Float>
float.Number,
Serialized Form| Modifier and Type | Field and Description |
|---|---|
static int |
MAX_EXPONENT
Maximum base-2 exponent that a finite value of the
float type may have. |
static float |
MAX_VALUE
Constant for the maximum
float value, (2 - 2-23) * 2127. |
static int |
MIN_EXPONENT
Minimum base-2 exponent that a normal value of the
float type may have. |
static float |
MIN_NORMAL
Constant for the smallest positive normal value of the
float type. |
static float |
MIN_VALUE
Constant for the minimum
float value, 2-149. |
static float |
NaN
Constant for the Not-a-Number (NaN) value of the
float type. |
static float |
NEGATIVE_INFINITY
Constant for the negative infinity value of the
float type. |
static float |
POSITIVE_INFINITY
Constant for the positive infinity value of the
float type. |
static int |
SIZE
Constant for the number of bits needed to represent a
float in
two's complement form. |
static Class<Float> |
TYPE
The
Class object that represents the primitive type float. |
| Constructor and Description |
|---|
Float(double value)
Constructs a new
Float with the specified primitive double value. |
Float(float value)
Constructs a new
Float with the specified primitive float value. |
Float(String string)
Constructs a new
Float from the specified string. |
| Modifier and Type | Method and Description |
|---|---|
byte |
byteValue()
Returns this object's value as a byte.
|
static int |
compare(float float1,
float float2)
Compares the two specified float values.
|
int |
compareTo(Float object)
Compares this object to the specified float object to determine their
relative order.
|
double |
doubleValue()
Returns this object's value as a double.
|
boolean |
equals(Object object)
Tests this double for equality with
object. |
static int |
floatToIntBits(float value)
Returns an integer corresponding to the bits of the given
IEEE 754 single precision
float
value. |
static int |
floatToRawIntBits(float value)
Returns an integer corresponding to the bits of the given
IEEE 754 single precision
float
value. |
float |
floatValue()
Gets the primitive value of this float.
|
int |
hashCode()
Returns an integer hash code for this object.
|
static float |
intBitsToFloat(int bits)
Returns the IEEE 754
single precision float corresponding to the given
bits. |
int |
intValue()
Returns this object's value as an int.
|
boolean |
isInfinite()
Indicates whether this object represents an infinite value.
|
static boolean |
isInfinite(float f)
Indicates whether the specified float represents an infinite value.
|
boolean |
isNaN()
Indicates whether this object is a Not-a-Number (NaN) value.
|
static boolean |
isNaN(float f)
Indicates whether the specified float is a Not-a-Number (NaN)
value.
|
long |
longValue()
Returns this object's value as a long.
|
static float |
parseFloat(String string)
Parses the specified string as a float value.
|
short |
shortValue()
Returns this object's value as a short.
|
static String |
toHexString(float f)
Converts the specified float into its hexadecimal string representation.
|
String |
toString()
Returns a string containing a concise, human-readable description of this
object.
|
static String |
toString(float f)
Returns a string containing a concise, human-readable description of the
specified float value.
|
static Float |
valueOf(float f)
Returns a
Float instance for the specified float value. |
static Float |
valueOf(String string)
Parses the specified string as a float value.
|
public static final float MAX_VALUE
float value, (2 - 2-23) * 2127.public static final float MIN_VALUE
float value, 2-149.public static final float NaN
float type.public static final float POSITIVE_INFINITY
float type.public static final float NEGATIVE_INFINITY
float type.public static final float MIN_NORMAL
float type.public static final int MAX_EXPONENT
float type may have.
Equal to Math.getExponent(Float.MAX_VALUE).public static final int MIN_EXPONENT
float type may have.
Equal to Math.getExponent(Float.MIN_NORMAL).public static final Class<Float> TYPE
Class object that represents the primitive type float.public static final int SIZE
float in
two's complement form.public Float(float value)
Float with the specified primitive float value.value - the primitive float value to store in the new instance.public Float(double value)
Float with the specified primitive double value.value - the primitive double value to store in the new instance.public Float(String string) throws NumberFormatException
Float from the specified string.string - the string representation of a float value.NumberFormatException - if string can not be parsed as a float value.parseFloat(String)public int compareTo(Float object)
Float.NaN is equal to Float.NaN and it is greater
than any other float value, including Float.POSITIVE_INFINITY;compareTo in interface Comparable<Float>object - the float object to compare this object to.object; 0 if the value of this float and the
value of object are equal; a positive value if the value
of this float is greater than the value of object.Comparablepublic byte byteValue()
Numberpublic double doubleValue()
NumberdoubleValue in class Numberpublic boolean equals(Object object)
object.
To be equal, object must be an instance of Float and
floatToIntBits must give the same value for both objects.
Note that, unlike ==, -0.0 and +0.0 compare
unequal, and NaNs compare equal by this method.
equals in class Objectobject - the object to compare this float with.true if the specified object is equal to this
Float; false otherwise.Object.hashCode()public static int floatToIntBits(float value)
value. All Not-a-Number (NaN) values are converted to a single NaN
representation (0x7fc00000) (compare to floatToRawIntBits(float)).public static int floatToRawIntBits(float value)
value. Not-a-Number (NaN) values are preserved (compare
to floatToIntBits(float)).public float floatValue()
floatValue in class Numberpublic int hashCode()
ObjectObject.equals(java.lang.Object) returns true must return
the same hash code value. This means that subclasses of Object
usually override both methods or neither method.
Note that hash values must not change over time unless information used in equals comparisons also changes.
See Writing a correct
hashCode method
if you intend implementing your own hashCode method.
hashCode in class ObjectObject.equals(java.lang.Object)public static float intBitsToFloat(int bits)
bits.public int intValue()
Numberpublic boolean isInfinite()
true if the value of this float is positive or negative
infinity; false otherwise.public static boolean isInfinite(float f)
f - the float to check.true if the value of f is positive or negative
infinity; false otherwise.public boolean isNaN()
true if this float is Not-a-Number;
false if it is a (potentially infinite) float number.public static boolean isNaN(float f)
f - the float value to check.true if f is Not-a-Number;
false if it is a (potentially infinite) float number.public long longValue()
Numberpublic static float parseFloat(String string) throws NumberFormatException
string - the string representation of a float value.string.NumberFormatException - if string can not be parsed as a float value.valueOf(String)public short shortValue()
NumbershortValue in class Numberpublic String toString()
ObjectgetClass().getName() + '@' + Integer.toHexString(hashCode())
See Writing a useful
toString method
if you intend implementing your own toString method.
public static String toString(float f)
f - the float to convert to a string.f.public static Float valueOf(String string) throws NumberFormatException
string - the string representation of a float value.Float instance containing the float value represented
by string.NumberFormatException - if string can not be parsed as a float value.parseFloat(String)public static int compare(float float1,
float float2)
Float.NaN is equal to Float.NaN and it is greater
than any other float value, including Float.POSITIVE_INFINITY;float1 - the first value to compare.float2 - the second value to compare.float1 is less than float2;
0 if float1 and float2 are equal; a positive
value if float1 is greater than float2.public static Float valueOf(float f)
Float instance for the specified float value.f - the float value to store in the instance.Float instance containing f.public static String toHexString(float f)
f - the float to convert.f.