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java.lang.Objectjava.lang.Float
public final class Float
Minimal Float implementation that supports floatToIntBits and intBitsToFloat
| Method Summary | |
|---|---|
static int |
floatToIntBits(float value)
Returns the bit represention of a single-float value. |
static float |
intBitsToFloat(int value)
Returns the single-float corresponding to a given bit represention. |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait |
| Method Detail |
|---|
public static int floatToIntBits(float value)
0x80000000) represents the sign of the floating-point
number.
0x7f800000) represent the exponent.
0x007fffff) represent the significand (sometimes called
the mantissa) of the floating-point number.
0x7f800000.
0xff800000.
If the argument is NaN, the result is the integer representing the actual NaN value. The lejos implementation behaves like floatToRawIntBits and does not collapse NaN values.
intBitsToFloat(int) method, will produce a floating-point
value equal to the argument to floatToRawIntBits.
value - a floating-point number.
public static float intBitsToFloat(int value)
If the argument is 0x7f800000, the result is positive
infinity.
If the argument is 0xff800000, the result is negative
infinity.
If the argument is any value in the range 0x7f800001
through 0x7fffffff or in the range
0xff800001 through 0xffffffff, the result is
NaN. All IEEE 754 NaN values of type float are, in effect,
lumped together by the Java programming language into a single
float value called NaN. Distinct values of NaN are only
accessible by use of the Float.floatToRawIntBits method.
In all other cases, let s, e, and m be three values that can be computed from the argument:
int s = ((bits >> 31) == 0) ? 1 : -1;
int e = ((bits >> 23) & 0xff);
int m = (e == 0) ?
(bits & 0x7fffff) << 1 :
(bits & 0x7fffff) | 0x800000;
Then the floating-point result equals the value of the mathematical
expression s·m·2e-150.
value - an integer.
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