Class MutableFloat

java.lang.Object
java.lang.Number
org.apache.commons.lang.mutable.MutableFloat
All Implemented Interfaces:
Serializable, Comparable, Mutable

public class MutableFloat extends Number implements Comparable, Mutable
A mutable float wrapper.
Since:
2.1
Version:
$Id: MutableFloat.java 905707 2010-02-02 16:59:59Z niallp $
See Also:
  • Constructor Summary

    Constructors
    Constructor
    Description
    Constructs a new MutableFloat with the default value of zero.
    MutableFloat(float value)
    Constructs a new MutableFloat with the specified value.
    Constructs a new MutableFloat with the specified value.
    Constructs a new MutableFloat parsing the given string.
  • Method Summary

    Modifier and Type
    Method
    Description
    void
    add(float operand)
    Adds a value to the value of this instance.
    void
    add(Number operand)
    Adds a value to the value of this instance.
    int
    Compares this mutable to another in ascending order.
    void
    Decrements the value.
    double
    Returns the value of this MutableFloat as a double.
    boolean
    Compares this object against some other object.
    float
    Returns the value of this MutableFloat as a float.
    Gets the value as a Float instance.
    int
    Returns a suitable hash code for this mutable.
    void
    Increments the value.
    int
    Returns the value of this MutableFloat as an int.
    boolean
    Checks whether the float value is infinite.
    boolean
    Checks whether the float value is the special NaN value.
    long
    Returns the value of this MutableFloat as a long.
    void
    setValue(float value)
    Sets the value.
    void
    Sets the value from any Number instance.
    void
    subtract(float operand)
    Subtracts a value from the value of this instance.
    void
    subtract(Number operand)
    Subtracts a value from the value of this instance.
    Gets this mutable as an instance of Float.
    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 Details

    • MutableFloat

      public MutableFloat()
      Constructs a new MutableFloat with the default value of zero.
    • MutableFloat

      public MutableFloat(float value)
      Constructs a new MutableFloat with the specified value.
      Parameters:
      value - the initial value to store
    • MutableFloat

      public MutableFloat(Number value)
      Constructs a new MutableFloat with the specified value.
      Parameters:
      value - the initial value to store, not null
      Throws:
      NullPointerException - if the object is null
    • MutableFloat

      public MutableFloat(String value) throws NumberFormatException
      Constructs a new MutableFloat parsing the given string.
      Parameters:
      value - the string to parse, not null
      Throws:
      NumberFormatException - if the string cannot be parsed into a float
      Since:
      2.5
  • Method Details

    • getValue

      public Object getValue()
      Gets the value as a Float instance.
      Specified by:
      getValue in interface Mutable
      Returns:
      the value as a Float, never null
    • setValue

      public void setValue(float 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 float value is the special NaN value.
      Returns:
      true if NaN
    • isInfinite

      public boolean isInfinite()
      Checks whether the float 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(float operand)
      Adds a value to the value of this instance.
      Parameters:
      operand - the value to add, not null
      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(float operand)
      Subtracts a value from the value of this instance.
      Parameters:
      operand - the value to subtract
      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 MutableFloat 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 MutableFloat 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 MutableFloat 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 MutableFloat as a double.
      Specified by:
      doubleValue in class Number
      Returns:
      the numeric value represented by this object after conversion to type double.
    • toFloat

      public Float toFloat()
      Gets this mutable as an instance of Float.
      Returns:
      a Float instance containing the value from this mutable, never null
    • equals

      public boolean equals(Object obj)
      Compares this object against some other object. The result is true if and only if the argument is not null and is a Float object that represents a float that has the identical bit pattern to the bit pattern of the float represented by this object. For this purpose, two float values are considered to be the same if and only if the method Float.floatToIntBits(float)returns the same int value when applied to each.

      Note that in most cases, for two instances of class Float,f1 and f2, the value of f1.equals(f2) is true if and only if

         f1.floatValue() == f2.floatValue()
       

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

      • If f1 and f2 both represent Float.NaN, then the equals method returns true, even though Float.NaN==Float.NaN has the value false.
      • If f1 represents +0.0f while f2 represents -0.0f, or vice versa, the equal test has the value false, even though 0.0f==-0.0f has the value true.
      This definition 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.
      See Also:
    • 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
    • toString

      public String toString()
      Returns the String value of this mutable.
      Overrides:
      toString in class Object
      Returns:
      the mutable value as a string