20.9

java.lang.Float

THE PACKAGE JAVA.LANG

20.9.20

public boolean isInfinite()

The result is

true

 if and only if the value represented by this

Float

 object is pos 

itive infinity or negative infinity.

20.9.21

public static boolean isInfinite(float v)

The result is

true

 if and only if the value of the argument is positive infinity or

negative infinity.

20.9.22

public static int floatToIntBits(float value)

The result is a representation of the floating point argument according to the IEEE

754 floating point  single format  bit layout:

Bit 31 (the bit that is selected by the mask

0x80000000

) represents the sign of

the floating point number.

Bits 30 23 (the bits that are selected by the mask

0x7f800000

) represent the

exponent.

Bits 22 0 (the bits that are selected by the mask

0x007fffff

) represent the

significand (sometimes called the mantissa) of the floating point number.

If the argument is positive infinity, the result will be

0x7f800000

.

If the argument is negative infinity, the result will be

0xff800000

.

If the argument is NaN, the result will be

0x7fc00000

.

In all cases, the result is an integer that, when given to the

intBitsToFloat

method ( 20.9.23), will produce a floating point value equal to the argument to

floatToIntBits

.

20.9.23

public static float intBitsToFloat(int bits)

The argument is considered to be a representation of a floating point value accord 

ing to the IEEE 754 floating point  single format  bit layout. That floating point

value is returned as the result.

If the argument is

0x7f800000

, the result will be positive infinity.

If the argument is

0xff800000

, the result will be negative infinity.

508