sun.misc

Class FloatingDecimal

java.lang.Object

sun.misc.FloatingDecimal

public class FloatingDecimal
extends Object

A class for converting between ASCII and decimal representations of a single or double precision floating point number. Most conversions are provided via static convenience methods, although a BinaryToASCIIConverter instance may be obtained and reused.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	FloatingDecimal.BinaryToASCIIConverter A converter which can process single or double precision floating point values into an ASCII String representation.

Constructor Summary

Constructors

Constructor and Description
FloatingDecimal()

Method Summary

Modifier and Type	Method and Description
static int	numberOfLeadingZeros(long i) Returns the number of zero bits preceding the highest-order ("leftmost") one-bit in the two's complement binary representation of the specified long value.
static int	numberOfTrailingZeros(long i) Returns the number of zero bits following the lowest-order ("rightmost") one-bit in the two's complement binary representation of the specified long value.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FloatingDecimal

public FloatingDecimal()

Method Detail

numberOfLeadingZeros

public static int numberOfLeadingZeros(long i)

Returns the number of zero bits preceding the highest-order ("leftmost") one-bit in the two's complement binary representation of the specified long value. Returns 64 if the specified value has no one-bits in its two's complement representation, in other words if it is equal to zero.

Note that this method is closely related to the logarithm base 2. For all positive long values x:

• floor(log₂(x)) = 63 - numberOfLeadingZeros(x)
• ceil(log₂(x)) = 64 - numberOfLeadingZeros(x - 1)

Parameters:

i - the value whose number of leading zeros is to be computed

Returns:

the number of zero bits preceding the highest-order ("leftmost") one-bit in the two's complement binary representation of the specified long value, or 64 if the value is equal to zero.

Since:

1.5

numberOfTrailingZeros

public static int numberOfTrailingZeros(long i)

Returns the number of zero bits following the lowest-order ("rightmost") one-bit in the two's complement binary representation of the specified long value. Returns 64 if the specified value has no one-bits in its two's complement representation, in other words if it is equal to zero.

Parameters:

i - the value whose number of trailing zeros is to be computed

Returns:

the number of zero bits following the lowest-order ("rightmost") one-bit in the two's complement binary representation of the specified long value, or 64 if the value is equal to zero.

Since:

1.5