Added in API level 26

Summary: Constants | Ctors | Methods | Inherited Methods

Half

---

Kotlin |Java

public final class Half
extends Number implements Comparable<Half>

java.lang.Object
↳	java.lang.Number
	↳	android.util.Half

---

The Half class is a wrapper and a utility class to manipulate half-precision 16-bit IEEE 754 floating point data types (also called fp16 or binary16). A half-precision float can be created from or converted to single-precision floats, and is stored in a short data type. To distinguish short values holding half-precision floats from regular short values, it is recommended to use the @HalfFloat annotation.

The IEEE 754 standard specifies an fp16 as having the following format:

• Sign bit: 1 bit
• Exponent width: 5 bits
• Significand: 10 bits

The format is laid out as follows:

 1   11111   1111111111
 ^   --^--   -----^----
 sign  |          |_______ significand
       |
       -- exponent
 

Half-precision floating points can be useful to save memory and/or bandwidth at the expense of range and precision when compared to single-precision floating points (fp32).

To help you decide whether fp16 is the right storage type for you need, please refer to the table below that shows the available precision throughout the range of possible values. The precision column indicates the step size between two consecutive numbers in a specific part of the range.

Range start	Precision
0	1 ⁄ 16,777,216
1 ⁄ 16,384	1 ⁄ 16,777,216
1 ⁄ 8,192	1 ⁄ 8,388,608
1 ⁄ 4,096	1 ⁄ 4,194,304
1 ⁄ 2,048	1 ⁄ 2,097,152
1 ⁄ 1,024	1 ⁄ 1,048,576
1 ⁄ 512	1 ⁄ 524,288
1 ⁄ 256	1 ⁄ 262,144
1 ⁄ 128	1 ⁄ 131,072
1 ⁄ 64	1 ⁄ 65,536
1 ⁄ 32	1 ⁄ 32,768
1 ⁄ 16	1 ⁄ 16,384
1 ⁄ 8	1 ⁄ 8,192
1 ⁄ 4	1 ⁄ 4,096
1 ⁄ 2	1 ⁄ 2,048
1	1 ⁄ 1,024
2	1 ⁄ 512
4	1 ⁄ 256
8	1 ⁄ 128
16	1 ⁄ 64
32	1 ⁄ 32
64	1 ⁄ 16
128	1 ⁄ 8
256	1 ⁄ 4
512	1 ⁄ 2
1,024	1
2,048	2
4,096	4
8,192	8
16,384	16
32,768	32

This table shows that numbers higher than 1024 lose all fractional precision.

Summary

Constants
short	EPSILON Epsilon is the difference between 1.0 and the next value representable by a half-precision floating-point.
short	LOWEST_VALUE Smallest negative value a half-precision float may have.
int	MAX_EXPONENT Maximum exponent a finite half-precision float may have.
short	MAX_VALUE Maximum positive finite value a half-precision float may have.
int	MIN_EXPONENT Minimum exponent a normalized half-precision float may have.
short	MIN_NORMAL Smallest positive normal value a half-precision float may have.
short	MIN_VALUE Smallest positive non-zero value a half-precision float may have.
short	NEGATIVE_INFINITY Negative infinity of type half-precision float.
short	NEGATIVE_ZERO Negative 0 of type half-precision float.
short	NaN A Not-a-Number representation of a half-precision float.
short	POSITIVE_INFINITY Positive infinity of type half-precision float.
short	POSITIVE_ZERO Positive 0 of type half-precision float.
int	SIZE The number of bits used to represent a half-precision float value.

Public constructors
Half(double value) Constructs a newly allocated Half object that represents the argument converted to a half-precision float.
Half(float value) Constructs a newly allocated Half object that represents the argument converted to a half-precision float.
Half(String value) Constructs a newly allocated Half object that represents the half-precision float value represented by the string.
Half(short value) Constructs a newly allocated Half object that represents the half-precision float type argument.

Public methods
static short	abs(short h) Returns the absolute value of the specified half-precision float.
byte	byteValue() Returns the value of this Half as a byte after a narrowing primitive conversion.
static short	ceil(short h) Returns the smallest half-precision float value toward negative infinity greater than or equal to the specified half-precision float value.
static int	compare(short x, short y) Compares the two specified half-precision float values.
int	compareTo(Half h) Compares the two specified half-precision float values.
static short	copySign(short magnitude, short sign) Returns the first parameter with the sign of the second parameter.
double	doubleValue() Returns the value of this Half as a double after a widening primitive conversion.
static boolean	equals(short x, short y) Returns true if the two half-precision float values are equal.
boolean	equals(Object o) Compares this object against the specified object.
float	floatValue() Returns the value of this Half as a float after a widening primitive conversion.
static short	floor(short h) Returns the largest half-precision float value toward positive infinity less than or equal to the specified half-precision float value.
static int	getExponent(short h) Returns the unbiased exponent used in the representation of the specified half-precision float value.
static int	getSign(short h) Returns the sign of the specified half-precision float.
static int	getSignificand(short h) Returns the significand, or mantissa, used in the representation of the specified half-precision float value.
static boolean	greater(short x, short y) Returns true if the first half-precision float value is greater (larger toward positive infinity) than the second half-precision float value.
static boolean	greaterEquals(short x, short y) Returns true if the first half-precision float value is greater (larger toward positive infinity) than or equal to the second half-precision float value.
static int	halfToIntBits(short h) Returns a representation of the specified half-precision float value according to the bit layout described in Half.
static int	halfToRawIntBits(short h) Returns a representation of the specified half-precision float value according to the bit layout described in Half.
static short	halfToShortBits(short h) Returns a representation of the specified half-precision float value according to the bit layout described in Half.
short	halfValue() Returns the half-precision value of this Half as a short containing the bit representation described in Half.
static int	hashCode(short h) Returns a hash code for a half-precision float value.
int	hashCode() Returns a hash code for this Half object.
static short	intBitsToHalf(int bits) Returns the half-precision float value corresponding to a given bit representation.
int	intValue() Returns the value of this Half as a int after a narrowing primitive conversion.
static boolean	isInfinite(short h) Returns true if the specified half-precision float value represents infinity, false otherwise.
boolean	isNaN() Returns true if this Half value represents a Not-a-Number, false otherwise.
static boolean	isNaN(short h) Returns true if the specified half-precision float value represents a Not-a-Number, false otherwise.
static boolean	isNormalized(short h) Returns true if the specified half-precision float value is normalized (does not have a subnormal representation).
static boolean	less(short x, short y) Returns true if the first half-precision float value is less (smaller toward negative infinity) than the second half-precision float value.
static boolean	lessEquals(short x, short y) Returns true if the first half-precision float value is less (smaller toward negative infinity) than or equal to the second half-precision float value.
long	longValue() Returns the value of this Half as a long after a narrowing primitive conversion.
static short	max(short x, short y) Returns the larger of two half-precision float values (the value closest to positive infinity).
static short	min(short x, short y) Returns the smaller of two half-precision float values (the value closest to negative infinity).
static short	parseHalf(String s) Returns the half-precision float value represented by the specified string.
static short	round(short h) Returns the closest integral half-precision float value to the specified half-precision float value.
short	shortValue() Returns the value of this Half as a short after a narrowing primitive conversion.
static float	toFloat(short h) Converts the specified half-precision float value into a single-precision float value.
static short	toHalf(float f) Converts the specified single-precision float value into a half-precision float value.
static String	toHexString(short h) Returns a hexadecimal string representation of the specified half-precision float value.
static String	toString(short h) Returns a string representation of the specified half-precision float value.
String	toString() Returns a string representation of the specified half-precision float value.
static short	trunc(short h) Returns the truncated half-precision float value of the specified half-precision float value.
static Half	valueOf(String s) Returns a Half instance representing the specified string value.
static Half	valueOf(float f) Returns a Half instance representing the specified float value.
static Half	valueOf(short h) Returns a Half instance representing the specified half-precision float value.

Inherited methods
From class java.lang.Number byte byteValue() Returns the value of the specified number as a byte. abstract double doubleValue() Returns the value of the specified number as a double. abstract float floatValue() Returns the value of the specified number as a float. abstract int intValue() Returns the value of the specified number as an int. abstract long longValue() Returns the value of the specified number as a long. short shortValue() Returns the value of the specified number as a short.
From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
From interface java.lang.Comparable abstract int compareTo(Half o) Compares this object with the specified object for order.

Constants

EPSILON

Added in API level 26

public static final short EPSILON

Epsilon is the difference between 1.0 and the next value representable by a half-precision floating-point.

Constant Value: 5120 (0x00001400)

LOWEST_VALUE

Added in API level 26

public static final short LOWEST_VALUE

Smallest negative value a half-precision float may have.

Constant Value: -1025 (0xfffffbff)

MAX_EXPONENT

Added in API level 26

public static final int MAX_EXPONENT

Maximum exponent a finite half-precision float may have.

Constant Value: 15 (0x0000000f)

MAX_VALUE

Added in API level 26

public static final short MAX_VALUE

Maximum positive finite value a half-precision float may have.

Constant Value: 31743 (0x00007bff)

MIN_EXPONENT

Added in API level 26

public static final int MIN_EXPONENT

Minimum exponent a normalized half-precision float may have.

Constant Value: -14 (0xfffffff2)

MIN_NORMAL

Added in API level 26

public static final short MIN_NORMAL

Smallest positive normal value a half-precision float may have.

Constant Value: 1024 (0x00000400)

MIN_VALUE

Added in API level 26

public static final short MIN_VALUE

Smallest positive non-zero value a half-precision float may have.

Constant Value: 1 (0x00000001)

NEGATIVE_INFINITY

Added in API level 26

public static final short NEGATIVE_INFINITY

Negative infinity of type half-precision float.

Constant Value: -1024 (0xfffffc00)

NEGATIVE_ZERO

Added in API level 26

public static final short NEGATIVE_ZERO

Negative 0 of type half-precision float.

Constant Value: -32768 (0xffff8000)

NaN

Added in API level 26

public static final short NaN

A Not-a-Number representation of a half-precision float.

Constant Value: 32256 (0x00007e00)

POSITIVE_INFINITY

Added in API level 26

public static final short POSITIVE_INFINITY

Positive infinity of type half-precision float.

Constant Value: 31744 (0x00007c00)

POSITIVE_ZERO

Added in API level 26

public static final short POSITIVE_ZERO

Positive 0 of type half-precision float.

Constant Value: 0 (0x00000000)

SIZE

Added in API level 26

public static final int SIZE

The number of bits used to represent a half-precision float value.

Constant Value: 16 (0x00000010)

Public constructors

Half

Added in API level 26

public Half (double value)

Constructs a newly allocated Half object that represents the argument converted to a half-precision float.

Parameters
value	double: The value to be represented by the Half

See also:

• toHalf(float)

Half

Added in API level 26

public Half (float value)

Constructs a newly allocated Half object that represents the argument converted to a half-precision float.

Parameters
value	float: The value to be represented by the Half

See also:

• toHalf(float)

Half

Added in API level 26

public Half (String value)

Constructs a newly allocated Half object that represents the half-precision float value represented by the string. The string is converted to a half-precision float value as if by the valueOf(java.lang.String) method.

Calling this constructor is equivalent to calling:

     new Half(Float.parseFloat(value))
 

Parameters
value	String: A string to be converted to a Half This value cannot be null.

Throws
NumberFormatException	if the string does not contain a parsable number

See also:

• Float.valueOf(java.lang.String)
• toHalf(float)

Half

Added in API level 26

public Half (short value)

Constructs a newly allocated Half object that represents the half-precision float type argument.

Parameters
value	short: The value to be represented by the Half

Public methods

abs

Added in API level 26

public static short abs (short h)

Returns the absolute value of the specified half-precision float. Special values are handled in the following ways:

• If the specified half-precision float is NaN, the result is NaN
• If the specified half-precision float is zero (negative or positive), the result is positive zero (see POSITIVE_ZERO)
• If the specified half-precision float is infinity (negative or positive), the result is positive infinity (see POSITIVE_INFINITY)

Parameters
h	short: A half-precision float value

Returns
short	The absolute value of the specified half-precision float

byteValue

Added in API level 26

public byte byteValue ()

Returns the value of this Half as a byte after a narrowing primitive conversion.

Returns
byte	The half-precision float value represented by this object converted to type byte

ceil

Added in API level 26

public static short ceil (short h)

Returns the smallest half-precision float value toward negative infinity greater than or equal to the specified half-precision float value. Special values are handled in the following ways:

• If the specified half-precision float is NaN, the result is NaN
• If the specified half-precision float is infinity (negative or positive), the result is infinity (with the same sign)
• If the specified half-precision float is zero (negative or positive), the result is zero (with the same sign)

Parameters
h	short: A half-precision float value

Returns
short	The smallest half-precision float value toward negative infinity greater than or equal to the specified half-precision float value

compare

Added in API level 26

public static int compare (short x, 
                short y)

Compares the two specified half-precision float values. The following conditions apply during the comparison:

• NaN is considered by this method to be equal to itself and greater than all other half-precision float values (including #POSITIVE_INFINITY)
• POSITIVE_ZERO is considered by this method to be greater than NEGATIVE_ZERO.

Parameters
x	short: The first half-precision float value to compare.
y	short: The second half-precision float value to compare

Returns
int	The value 0 if x is numerically equal to y, a value less than 0 if x is numerically less than y, and a value greater than 0 if x is numerically greater than y

compareTo

Added in API level 26

public int compareTo (Half h)

Compares the two specified half-precision float values. The following conditions apply during the comparison:

• NaN is considered by this method to be equal to itself and greater than all other half-precision float values (including #POSITIVE_INFINITY)
• POSITIVE_ZERO is considered by this method to be greater than NEGATIVE_ZERO.

Parameters
h	Half: The half-precision float value to compare to the half-precision value represented by this Half object This value cannot be null.

Returns
int	The value 0 if x is numerically equal to y; a value less than 0 if x is numerically less than y; and a value greater than 0 if x is numerically greater than y

copySign

Added in API level 26

public static short copySign (short magnitude, 
                short sign)

Returns the first parameter with the sign of the second parameter. This method treats NaNs as having a sign.

Parameters
magnitude	short: A half-precision float value providing the magnitude of the result
sign	short: A half-precision float value providing the sign of the result

Returns
short	A value with the magnitude of the first parameter and the sign of the second parameter

doubleValue

Added in API level 26

public double doubleValue ()

Returns the value of this Half as a double after a widening primitive conversion.

Returns
double	The half-precision float value represented by this object converted to type double

equals

Added in API level 26

public static boolean equals (short x, 
                short y)

Returns true if the two half-precision float values are equal. If either of the values is NaN, the result is false. POSITIVE_ZERO and NEGATIVE_ZERO are considered equal.

Parameters
x	short: The first half-precision value
y	short: The second half-precision value

Returns
boolean	True if x is equal to y, false otherwise

equals

Added in API level 26

public boolean equals (Object o)

Compares this object against the specified object. The result is true if and only if the argument is not null and is a Half object that represents the same half-precision value as the this object. Two half-precision values are considered to be the same if and only if the method halfToIntBits(short) returns an identical int value for both.

Parameters
o	Object: The object to compare This value may be null.

Returns
boolean	True if the objects are the same, false otherwise

See also:

• halfToIntBits(short)

floatValue

Added in API level 26

public float floatValue ()

Returns the value of this Half as a float after a widening primitive conversion.

Returns
float	The half-precision float value represented by this object converted to type float

floor

Added in API level 26

public static short floor (short h)

Returns the largest half-precision float value toward positive infinity less than or equal to the specified half-precision float value. Special values are handled in the following ways:

• If the specified half-precision float is NaN, the result is NaN
• If the specified half-precision float is infinity (negative or positive), the result is infinity (with the same sign)
• If the specified half-precision float is zero (negative or positive), the result is zero (with the same sign)

Parameters
h	short: A half-precision float value

Returns
short	The largest half-precision float value toward positive infinity less than or equal to the specified half-precision float value

getExponent

Added in API level 26

public static int getExponent (short h)

Returns the unbiased exponent used in the representation of the specified half-precision float value. if the value is NaN or infinite, this* method returns MAX_EXPONENT + 1. If the argument is 0 or a subnormal representation, this method returns MIN_EXPONENT - 1.

Parameters
h	short: A half-precision float value

Returns
int	The unbiased exponent of the specified value

getSign

Added in API level 26

public static int getSign (short h)

Returns the sign of the specified half-precision float.

Parameters
h	short: A half-precision float value

Returns
int	1 if the value is positive, -1 if the value is negative

getSignificand

Added in API level 26

public static int getSignificand (short h)

Returns the significand, or mantissa, used in the representation of the specified half-precision float value.

Parameters
h	short: A half-precision float value

Returns
int	The significand, or significand, of the specified vlaue

greater

Added in API level 26

public static boolean greater (short x, 
                short y)

Returns true if the first half-precision float value is greater (larger toward positive infinity) than the second half-precision float value. If either of the values is NaN, the result is false.

Parameters
x	short: The first half-precision value
y	short: The second half-precision value

Returns
boolean	True if x is greater than y, false otherwise

greaterEquals

Added in API level 26

public static boolean greaterEquals (short x, 
                short y)

Returns true if the first half-precision float value is greater (larger toward positive infinity) than or equal to the second half-precision float value. If either of the values is NaN, the result is false.

Parameters
x	short: The first half-precision value
y	short: The second half-precision value

Returns
boolean	True if x is greater than y, false otherwise

halfToIntBits

Added in API level 26

public static int halfToIntBits (short h)

Returns a representation of the specified half-precision float value according to the bit layout described in Half.

Unlike halfToRawIntBits(short), this method collapses all possible Not-a-Number values to a single canonical Not-a-Number value defined by NaN.

Parameters
h	short: A half-precision float value

Returns
int	The bits that represent the half-precision float value

See also:

• halfToRawIntBits(short)
• halfToShortBits(short)
• intBitsToHalf(int)

halfToRawIntBits

Added in API level 26

public static int halfToRawIntBits (short h)

Returns a representation of the specified half-precision float value according to the bit layout described in Half.

The argument is considered to be a representation of a half-precision float value according to the bit layout described in Half. The 16 most significant bits of the returned value are set to 0.

Parameters
h	short: A half-precision float value

Returns
int	The bits that represent the half-precision float value

See also:

• halfToIntBits(short)
• intBitsToHalf(int)

halfToShortBits

Added in API level 26

public static short halfToShortBits (short h)

Returns a representation of the specified half-precision float value according to the bit layout described in Half.

Similar to halfToIntBits(short), this method collapses all possible Not-a-Number values to a single canonical Not-a-Number value defined by NaN.

Parameters
h	short: A half-precision float value

Returns
short	The bits that represent the half-precision float value

See also:

• halfToIntBits(short)

halfValue

Added in API level 26

public short halfValue ()

Returns the half-precision value of this Half as a short containing the bit representation described in Half.

Returns
short	The half-precision float value represented by this object

hashCode

Added in API level 26

public static int hashCode (short h)

Returns a hash code for a half-precision float value.

Parameters
h	short: The value to hash

Returns
int	A hash code value for a half-precision float value

hashCode

Added in API level 26

public int hashCode ()

Returns a hash code for this Half object. The result is the integer bit representation, exactly as produced by the method halfToIntBits(short), of the primitive half-precision float value represented by this Half object.

Returns
int	A hash code value for this object

intBitsToHalf

Added in API level 26

public static short intBitsToHalf (int bits)

Returns the half-precision float value corresponding to a given bit representation.

The argument is considered to be a representation of a half-precision float value according to the bit layout described in Half. The 16 most significant bits of the argument are ignored.

Parameters
bits	int: An integer

Returns
short	The half-precision float value with the same bit pattern

intValue

Added in API level 26

public int intValue ()

Returns the value of this Half as a int after a narrowing primitive conversion.

Returns
int	The half-precision float value represented by this object converted to type int

isInfinite

Added in API level 26

public static boolean isInfinite (short h)

Returns true if the specified half-precision float value represents infinity, false otherwise.

Parameters
h	short: A half-precision float value

Returns
boolean	True if the value is positive infinity or negative infinity, false otherwise

isNaN

Added in API level 26

public boolean isNaN ()

Returns true if this Half value represents a Not-a-Number, false otherwise.

Returns
boolean	True if the value is a NaN, false otherwise

isNaN

Added in API level 26

public static boolean isNaN (short h)

Returns true if the specified half-precision float value represents a Not-a-Number, false otherwise.

Parameters
h	short: A half-precision float value

Returns
boolean	True if the value is a NaN, false otherwise

isNormalized

Added in API level 26

public static boolean isNormalized (short h)

Returns true if the specified half-precision float value is normalized (does not have a subnormal representation). If the specified value is POSITIVE_INFINITY, NEGATIVE_INFINITY, POSITIVE_ZERO, NEGATIVE_ZERO, NaN or any subnormal number, this method returns false.

Parameters
h	short: A half-precision float value

Returns
boolean	True if the value is normalized, false otherwise

less

Added in API level 26

public static boolean less (short x, 
                short y)

Returns true if the first half-precision float value is less (smaller toward negative infinity) than the second half-precision float value. If either of the values is NaN, the result is false.

Parameters
x	short: The first half-precision value
y	short: The second half-precision value

Returns
boolean	True if x is less than y, false otherwise

lessEquals

Added in API level 26

public static boolean lessEquals (short x, 
                short y)

Returns true if the first half-precision float value is less (smaller toward negative infinity) than or equal to the second half-precision float value. If either of the values is NaN, the result is false.

Parameters
x	short: The first half-precision value
y	short: The second half-precision value

Returns
boolean	True if x is less than or equal to y, false otherwise

longValue

Added in API level 26

public long longValue ()

Returns the value of this Half as a long after a narrowing primitive conversion.

Returns
long	The half-precision float value represented by this object converted to type long

max

Added in API level 26

public static short max (short x, 
                short y)

Returns the larger of two half-precision float values (the value closest to positive infinity). Special values are handled in the following ways:

• If either value is NaN, the result is NaN
• POSITIVE_ZERO is greater than NEGATIVE_ZERO

Parameters
x	short: The first half-precision value
y	short: The second half-precision value

Returns
short	The larger of the two specified half-precision values

min

Added in API level 26

public static short min (short x, 
                short y)

Returns the smaller of two half-precision float values (the value closest to negative infinity). Special values are handled in the following ways:

• If either value is NaN, the result is NaN
• NEGATIVE_ZERO is smaller than POSITIVE_ZERO

Parameters
x	short: The first half-precision value
y	short: The second half-precision value

Returns
short	The smaller of the two specified half-precision values

parseHalf

Added in API level 26

public static short parseHalf (String s)

Returns the half-precision float value represented by the specified string. Calling this method is equivalent to calling toHalf(Float.parseString(h)). See Float.valueOf(String) for more information on the format of the string representation.

Parameters
s	String: The string to be parsed This value cannot be null.

Returns
short	A half-precision float value represented by the string

Throws
NumberFormatException	if the string does not contain a parsable half-precision float value

round

Added in API level 26

public static short round (short h)

Returns the closest integral half-precision float value to the specified half-precision float value. Special values are handled in the following ways:

• If the specified half-precision float is NaN, the result is NaN
• If the specified half-precision float is infinity (negative or positive), the result is infinity (with the same sign)
• If the specified half-precision float is zero (negative or positive), the result is zero (with the same sign)

Note: Unlike the identically named int java.lang.Math.round(float) method, this returns a Half value stored in a short, not an actual short integer result.

Parameters
h	short: A half-precision float value

Returns
short	The value of the specified half-precision float rounded to the nearest half-precision float value

shortValue

Added in API level 26

public short shortValue ()

Returns the value of this Half as a short after a narrowing primitive conversion.

Returns
short	The half-precision float value represented by this object converted to type short

toFloat

Added in API level 26

public static float toFloat (short h)

Converts the specified half-precision float value into a single-precision float value. The following special cases are handled:

• If the input is NaN, the returned value is Float.NaN
• If the input is POSITIVE_INFINITY or NEGATIVE_INFINITY, the returned value is respectively Float.POSITIVE_INFINITY or Float.NEGATIVE_INFINITY
• If the input is 0 (positive or negative), the returned value is +/-0.0f
• Otherwise, the returned value is a normalized single-precision float value

Parameters
h	short: The half-precision float value to convert to single-precision

Returns
float	A normalized single-precision float value

toHalf

Added in API level 26

public static short toHalf (float f)

Converts the specified single-precision float value into a half-precision float value. The following special cases are handled:

• If the input is NaN (see Float.isNaN(float)), the returned value is NaN
• If the input is Float.POSITIVE_INFINITY or Float.NEGATIVE_INFINITY, the returned value is respectively POSITIVE_INFINITY or NEGATIVE_INFINITY
• If the input is 0 (positive or negative), the returned value is POSITIVE_ZERO or NEGATIVE_ZERO
• If the input is a less than MIN_VALUE, the returned value is flushed to POSITIVE_ZERO or NEGATIVE_ZERO
• If the input is a less than MIN_NORMAL, the returned value is a denorm half-precision float
• Otherwise, the returned value is rounded to the nearest representable half-precision float value

Parameters
f	float: The single-precision float value to convert to half-precision

Returns
short	A half-precision float value

toHexString

Added in API level 26

public static String toHexString (short h)

Returns a hexadecimal string representation of the specified half-precision float value. If the value is a NaN, the result is "NaN", otherwise the result follows this format:

• If the sign is positive, no sign character appears in the result
• If the sign is negative, the first character is '-'
• If the value is inifinity, the string is "Infinity"
• If the value is 0, the string is "0x0.0p0"
• If the value has a normalized representation, the exponent and significand are represented in the string in two fields. The significand starts with "0x1." followed by its lowercase hexadecimal representation. Trailing zeroes are removed unless all digits are 0, then a single zero is used. The significand representation is followed by the exponent, represented by "p", itself followed by a decimal string of the unbiased exponent
• If the value has a subnormal representation, the significand starts with "0x0." followed by its lowercase hexadecimal representation. Trailing zeroes are removed unless all digits are 0, then a single zero is used. The significand representation is followed by the exponent, represented by "p-14"

Parameters
h	short: A half-precision float value

Returns
String	A hexadecimal string representation of the specified value This value cannot be null.

toString

Added in API level 26

public static String toString (short h)

Returns a string representation of the specified half-precision float value. Calling this method is equivalent to calling Float.toString(toFloat(h)). See Float.toString(float) for more information on the format of the string representation.

Parameters
h	short: A half-precision float value

Returns
String	A string representation of the specified value This value cannot be null.

toString

Added in API level 26

public String toString ()

Returns a string representation of the specified half-precision float value. See toString(short) for more information.

Returns
String	A string representation of this Half object This value cannot be null.

trunc

Added in API level 26

public static short trunc (short h)

Returns the truncated half-precision float value of the specified half-precision float value. Special values are handled in the following ways:

• If the specified half-precision float is NaN, the result is NaN
• If the specified half-precision float is infinity (negative or positive), the result is infinity (with the same sign)
• If the specified half-precision float is zero (negative or positive), the result is zero (with the same sign)

Parameters
h	short: A half-precision float value

Returns
short	The truncated half-precision float value of the specified half-precision float value

valueOf

Added in API level 26

public static Half valueOf (String s)

Returns a Half instance representing the specified string value. Calling this method is equivalent to calling toHalf(Float.parseString(h)). See Float.valueOf(String) for more information on the format of the string representation.

Parameters
s	String: The string to be parsed This value cannot be null.

Returns
Half	a Half instance representing h This value cannot be null.

Throws
NumberFormatException	if the string does not contain a parsable half-precision float value

valueOf

Added in API level 26

public static Half valueOf (float f)

Returns a Half instance representing the specified float value.

Parameters
f	float: A float value

Returns
Half	a Half instance representing f This value cannot be null.

valueOf

Added in API level 26

public static Half valueOf (short h)

Returns a Half instance representing the specified half-precision float value.

Parameters
h	short: A half-precision float value

Returns
Half	a Half instance representing h This value cannot be null.