java.lang.Object
- java.lang.Number
- - org.apache.commons.lang.mutable.MutableDouble

All Implemented Interfaces:

Serializable, Comparable, Mutable
```
public class MutableDouble
extends Number
implements Comparable, Mutable
```
A mutable double wrapper.

Since:

2.1

Version:

$Id: MutableDouble.java 905707 2010-02-02 16:59:59Z niallp $

See Also:

Double, Serialized Form

Constructor Summary

Constructors
Constructor	Description
`MutableDouble()`	Constructs a new MutableDouble with the default value of zero.
`MutableDouble(double value)`	Constructs a new MutableDouble with the specified value.
`MutableDouble(Number value)`	Constructs a new MutableDouble with the specified value.
`MutableDouble(String value)`	Constructs a new MutableDouble parsing the given string.

Method Summary

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

Methods inherited from class java.lang.Number
byteValue, shortValue

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - MutableDouble
```
public MutableDouble()
```
    Constructs a new MutableDouble with the default value of zero.
  - MutableDouble
```
public MutableDouble(double value)
```
    Constructs a new MutableDouble with the specified value.
    
    Parameters:
    
    value - the initial value to store
  - MutableDouble
```
public MutableDouble(Number value)
```
    Constructs a new MutableDouble with the specified value.
    
    Parameters:
    
    value - the initial value to store, not null
    
    Throws:
    
    NullPointerException - if the object is null
  - MutableDouble
```
public MutableDouble(String value)
              throws NumberFormatException
```
    Constructs a new MutableDouble parsing the given string.
    
    Parameters:
    
    value - the string to parse, not null
    
    Throws:
    
    NumberFormatException - if the string cannot be parsed into a double
    
    Since:
    
    2.5
- Method Detail
  - getValue
```
public Object getValue()
```
    Gets the value as a Double instance.
    
    Specified by:
    
    getValue in interface Mutable
    
    Returns:
    
    the value as a Double, never null
  - setValue
```
public void setValue(double value)
```
    Sets the value.
    
    Parameters:
    
    value - the value to set
  - setValue
```
public void setValue(Object value)
```
    Sets the value from any Number instance.
    
    Specified by:
    
    setValue in interface Mutable
    
    Parameters:
    
    value - the value to set, not null
    
    Throws:
    
    NullPointerException - if the object is null
    
    ClassCastException - if the type is not a Number
  - isNaN
```
public boolean isNaN()
```
    Checks whether the double value is the special NaN value.
    
    Returns:
    
    true if NaN
  - isInfinite
```
public boolean isInfinite()
```
    Checks whether the double value is infinite.
    
    Returns:
    
    true if infinite
  - increment
```
public void increment()
```
    Increments the value.
    
    Since:
    
    Commons Lang 2.2
  - decrement
```
public void decrement()
```
    Decrements the value.
    
    Since:
    
    Commons Lang 2.2
  - add
```
public void add(double operand)
```
    Adds a value to the value of this instance.
    
    Parameters:
    
    operand - the value to add
    
    Since:
    
    Commons Lang 2.2
  - add
```
public void add(Number operand)
```
    Adds a value to the value of this instance.
    
    Parameters:
    
    operand - the value to add, not null
    
    Throws:
    
    NullPointerException - if the object is null
    
    Since:
    
    Commons Lang 2.2
  - subtract
```
public void subtract(double operand)
```
    Subtracts a value from the value of this instance.
    
    Parameters:
    
    operand - the value to subtract, not null
    
    Since:
    
    Commons Lang 2.2
  - subtract
```
public void subtract(Number operand)
```
    Subtracts a value from the value of this instance.
    
    Parameters:
    
    operand - the value to subtract, not null
    
    Throws:
    
    NullPointerException - if the object is null
    
    Since:
    
    Commons Lang 2.2
  - intValue
```
public int intValue()
```
    Returns the value of this MutableDouble as an int.
    
    Specified by:
    
    intValue in class Number
    
    Returns:
    
    the numeric value represented by this object after conversion to type int.
  - longValue
```
public long longValue()
```
    Returns the value of this MutableDouble as a long.
    
    Specified by:
    
    longValue in class Number
    
    Returns:
    
    the numeric value represented by this object after conversion to type long.
  - floatValue
```
public float floatValue()
```
    Returns the value of this MutableDouble as a float.
    
    Specified by:
    
    floatValue in class Number
    
    Returns:
    
    the numeric value represented by this object after conversion to type float.
  - doubleValue
```
public double doubleValue()
```
    Returns the value of this MutableDouble as a double.
    
    Specified by:
    
    doubleValue in class Number
    
    Returns:
    
    the numeric value represented by this object after conversion to type double.
  - toDouble
```
public Double toDouble()
```
    Gets this mutable as an instance of Double.
    
    Returns:
    
    a Double instance containing the value from this mutable, never null
  - equals
```
public boolean equals(Object obj)
```
    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.
    Overrides:
    
    equals in class Object
    
    Parameters:
    
    obj - the object to compare with, null returns false
    
    Returns:
    
    true if the objects are the same; false otherwise.
  - hashCode
```
public int hashCode()
```
    Returns a suitable hash code for this mutable.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    
    a suitable hash code
  - compareTo
```
public int compareTo(Object obj)
```
    Compares this mutable to another in ascending order.
    
    Specified by:
    
    compareTo in interface Comparable
    
    Parameters:
    
    obj - the other mutable to compare to, not null
    
    Returns:
    
    negative if this is less, zero if equal, positive if greater
    
    Throws:
    
    ClassCastException - if the argument is not a MutableDouble
  - toString
```
public String toString()
```
    Returns the String value of this mutable.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    the mutable value as a string

Class MutableDouble

Constructor Summary

Method Summary

Methods inherited from class java.lang.Number

Methods inherited from class java.lang.Object

Constructor Detail

MutableDouble

MutableDouble

MutableDouble

MutableDouble

Method Detail

getValue

setValue

setValue

isNaN

isInfinite

increment

decrement

add

add

subtract

subtract

intValue

longValue

floatValue

doubleValue

toDouble

equals

hashCode

compareTo

toString