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Java Source Code / Java Documentation » Library » Apache common lang » org.apache.commons.lang.mutable

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

java.lang .Number

org.apache.commons.lang.mutable .MutableDouble

MutableDouble
public class MutableDouble extends Number implements Comparable,Mutable(Code)
	A mutable `double` wrapper. See Also: Double since: 2.1 version: $Id: MutableDouble.java 437554 2006-08-28 06:21:41Z bayard $

Constructor Summary
public	MutableDouble() Constructs a new MutableDouble with the default value of zero.
public	MutableDouble(double value) Constructs a new MutableDouble with the specified value.
public	MutableDouble(Number value) Constructs a new MutableDouble with the specified value.

Method Summary
public void	add(double operand) Adds a value.
public void	add(Number operand) Adds a value.
public int	compareTo(Object obj) Compares this mutable to another in ascending order.
public void	decrement() Decrements the value.
public double	doubleValue() Returns the value of this MutableDouble as a double.
public boolean	equals(Object obj) Compares this object against the specified object.
public float	floatValue() Returns the value of this MutableDouble as a float.
public Object	getValue() Gets the value as a Double instance.
public int	hashCode() Returns a suitable hashcode for this mutable.
public void	increment() Increments the value.
public int	intValue() Returns the value of this MutableDouble as a int.
public boolean	isInfinite() Checks whether the double value is infinite.
public boolean	isNaN() Checks whether the double value is the special NaN value.
public long	longValue() Returns the value of this MutableDouble as a long.
public void	setValue(double value) Sets the value.
public void	setValue(Object value) Sets the value from any Number instance.
public void	subtract(double operand) Subtracts a value.
public void	subtract(Number operand) Subtracts a value.
public Double	toDouble() Gets this mutable as an instance of Double.
public String	toString() Returns the String value of this mutable.

Constructor Detail

MutableDouble
public MutableDouble()(Code)
	Constructs a new MutableDouble with the default value of zero.

MutableDouble
public MutableDouble(double value)(Code)
	Constructs a new MutableDouble with the specified value. Parameters: value - a value.

MutableDouble
public MutableDouble(Number value)(Code)
	Constructs a new MutableDouble with the specified value. Parameters: value - a value. throws: NullPointerException - if the object is null

Method Detail

add
public void add(double operand)(Code)
	Adds a value. Parameters: operand - the value to add since: Commons Lang 2.2

add
public void add(Number operand)(Code)
	Adds a value. Parameters: operand - the value to add throws: NullPointerException - if the object is null since: Commons Lang 2.2

compareTo
public int compareTo(Object obj)(Code)
	Compares this mutable to another in ascending order. Parameters: obj - the mutable to compare to negative if this is less, zero if equal, positive if greater throws: ClassCastException - if the argument is not a MutableDouble

decrement
public void decrement()(Code)
	Decrements the value. since: Commons Lang 2.2

doubleValue
public double doubleValue()(Code)
	Returns the value of this MutableDouble as a double. the numeric value represented by this object after conversion to type double.

equals

public boolean equals(Object obj)(Code)

Compares this object against the specified object. The result is true if and only if the argument is not null and is a Double object that represents a double that has the identical bit pattern to the bit pattern of the double represented by this object. For this purpose, two double values are considered to be the same if and only if the method Double.doubleToLongBits(double) returns the same long value when applied to each.

Note that in most cases, for two instances of class Double,d1 and d2, the value of d1.equals(d2) is true if and only if

 d1.doubleValue() == d2.doubleValue()

also has the value true. However, there are two exceptions:

If d1 and d2 both represent Double.NaN, then the equals method returns true, even though Double.NaN==Double.NaN has the value false.
If d1 represents +0.0 while d2 represents -0.0, or vice versa, the equal test has the value false, even though +0.0==-0.0 has the value true. This allows hashtables to operate properly.

Parameters:
obj - the object to compare with. true if the objects are the same; false otherwise.

floatValue
public float floatValue()(Code)
	Returns the value of this MutableDouble as a float. the numeric value represented by this object after conversion to type float.

getValue
public Object getValue()(Code)
	Gets the value as a Double instance. the value as a Double

hashCode
public int hashCode()(Code)
	Returns a suitable hashcode for this mutable. a suitable hashcode

increment
public void increment()(Code)
	Increments the value. since: Commons Lang 2.2

intValue
public int intValue()(Code)
	Returns the value of this MutableDouble as a int. the numeric value represented by this object after conversion to type int.

isInfinite
public boolean isInfinite()(Code)
	Checks whether the double value is infinite. true if infinite

isNaN
public boolean isNaN()(Code)
	Checks whether the double value is the special NaN value. true if NaN

longValue
public long longValue()(Code)
	Returns the value of this MutableDouble as a long. the numeric value represented by this object after conversion to type long.

setValue
public void setValue(double value)(Code)
	Sets the value. Parameters: value - the value to set

setValue
public void setValue(Object value)(Code)
	Sets the value from any Number instance. Parameters: value - the value to set throws: NullPointerException - if the object is null throws: ClassCastException - if the type is not a Number

subtract
public void subtract(double operand)(Code)
	Subtracts a value. Parameters: operand - the value to add since: Commons Lang 2.2

subtract
public void subtract(Number operand)(Code)
	Subtracts a value. Parameters: operand - the value to add throws: NullPointerException - if the object is null since: Commons Lang 2.2

toDouble
public Double toDouble()(Code)
	Gets this mutable as an instance of Double. a Double instance containing the value from this mutable

toString
public String toString()(Code)
	Returns the String value of this mutable. the mutable value as a string

Methods inherited from java.lang.Number

public byte byteValue()(Code)(Java Doc)
abstract public double doubleValue()(Code)(Java Doc)
abstract public float floatValue()(Code)(Java Doc)
abstract public int intValue()(Code)(Java Doc)
abstract public long longValue()(Code)(Java Doc)
public short shortValue()(Code)(Java Doc)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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