Package gnu.math

Class Numeric

java.lang.Object

java.lang.Number

gnu.math.Numeric

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

Quantity

public abstract class Numeric
extends Number

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	CEILING
static int	FLOOR
static int	NONNEG_MOD	Rounding mode to always produce a non-negative remainder.
static int	ROUND
static int	TRUNCATE

Constructor Summary

Constructors

Constructor	Description
Numeric()

Method Summary

Modifier and Type	Method	Description
abstract Numeric	abs()
Numeric	add(Object obj)
abstract Numeric	add(Object obj, int k)	Return this + k * obj.
Numeric	addReversed(Numeric x, int k)	Calculate x+k&this.
static Numeric	asNumericOrNull(Object value)
int	compare(Object obj)	Return an integer for which of this or obj is larger.
int	compareReversed(Numeric x)
abstract Numeric	div(Object obj)
Numeric	div_inv()	Return the multiplicative inverse.
Numeric	divReversed(Numeric x)
boolean	equals(Object obj)
float	floatValue()
boolean	geq(Object x)
boolean	grt(Object x)
int	intValue()
abstract boolean	isExact()
abstract boolean	isZero()
long	longValue()
abstract Numeric	mul(Object obj)
Numeric	mul_ident()	Return the multiplicative identity.
Numeric	mulReversed(Numeric x)
abstract Numeric	neg()
Numeric	power(IntNum y)	Return this raised to an integer power.
Numeric	sub(Object obj)
Numeric	toExact()
Numeric	toInexact()
String	toString()
abstract String	toString(int radix)

Methods inherited from class java.lang.Number

byteValue, doubleValue, shortValue

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

FLOOR

public static final int FLOOR

See Also:

Constant Field Values

CEILING

public static final int CEILING

See Also:

Constant Field Values

TRUNCATE

public static final int TRUNCATE

See Also:

Constant Field Values

ROUND

public static final int ROUND

See Also:

Constant Field Values

NONNEG_MOD

public static final int NONNEG_MOD

Rounding mode to always produce a non-negative remainder. Like FLOOR if the divisor is non-negative; CEILING otherwise. Used to implement R6RS's div/mod operators.

See Also:

Constant Field Values

Constructor Detail

Numeric

public Numeric()

Method Detail

floatValue

public float floatValue()

Specified by:

floatValue in class Number

intValue

public int intValue()

Specified by:

intValue in class Number

longValue

public long longValue()

Specified by:

longValue in class Number

add

public abstract Numeric add(Object obj,
                            int k)

Return this + k * obj.

add

public final Numeric add(Object obj)

sub

public final Numeric sub(Object obj)

mul

public abstract Numeric mul(Object obj)

div

public abstract Numeric div(Object obj)

abs

public abstract Numeric abs()

neg

public abstract Numeric neg()

toString

public abstract String toString(int radix)

toString

public String toString()

Overrides:

toString in class Object

asNumericOrNull

public static Numeric asNumericOrNull(Object value)

isExact

public abstract boolean isExact()

toExact

public Numeric toExact()

toInexact

public Numeric toInexact()

isZero

public abstract boolean isZero()

compare

public int compare(Object obj)

Return an integer for which of this or obj is larger. Return 1 if this>obj; 0 if this==obj; -1 if this<obj; -2 if this!=obj otherwise (for example if either is NaN); -3 if not comparable (incompatible types).

compareReversed

public int compareReversed(Numeric x)

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

grt

public boolean grt(Object x)

geq

public boolean geq(Object x)

addReversed

public Numeric addReversed(Numeric x,
                           int k)

Calculate x+k&this.

mulReversed

public Numeric mulReversed(Numeric x)

divReversed

public Numeric divReversed(Numeric x)

div_inv

public Numeric div_inv()

Return the multiplicative inverse.

mul_ident

public Numeric mul_ident()

Return the multiplicative identity.

power

public Numeric power(IntNum y)

Return this raised to an integer power. Implemented by repeated squaring and multiplication. If y < 0, returns div_inv of the result.