Package org.apache.commons.lang3.mutable

Class MutableInt

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<MutableInt>, Mutable<java.lang.Number>
    public class MutableInt
extends java.lang.Number
implements java.lang.Comparable<MutableInt>, Mutable<java.lang.Number>
    A mutable int wrapper.

    Note that as MutableInt does not extend Integer, it is not treated by String.format as an Integer parameter.

    Since:
    2.1
    See Also:
    Integer, Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      MutableInt()
      Constructs a new MutableInt with the default value of zero.
      MutableInt​(int value)
      Constructs a new MutableInt with the specified value.
      MutableInt​(java.lang.Number value)
      Constructs a new MutableInt with the specified value.
      MutableInt​(java.lang.String value)
      Constructs a new MutableInt parsing the given string.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void add​(int operand)
      Adds a value to the value of this instance.
      void add​(java.lang.Number operand)
      Adds a value to the value of this instance.
      int addAndGet​(int operand)
      Increments this instance's value by operand; this method returns the value associated with the instance immediately after the addition operation.
      int addAndGet​(java.lang.Number operand)
      Increments this instance's value by operand; this method returns the value associated with the instance immediately after the addition operation.
      int compareTo​(MutableInt other)
      Compares this mutable to another in ascending order.
      void decrement()
      Decrements the value.
      int decrementAndGet()
      Decrements this instance's value by 1; this method returns the value associated with the instance immediately after the decrement operation.
      double doubleValue()
      Returns the value of this MutableInt as a double.
      boolean equals​(java.lang.Object obj)
      Compares this object to the specified object.
      float floatValue()
      Returns the value of this MutableInt as a float.
      int getAndAdd​(int operand)
      Increments this instance's value by operand; this method returns the value associated with the instance immediately prior to the addition operation.
      int getAndAdd​(java.lang.Number operand)
      Increments this instance's value by operand; this method returns the value associated with the instance immediately prior to the addition operation.
      int getAndDecrement()
      Decrements this instance's value by 1; this method returns the value associated with the instance immediately prior to the decrement operation.
      int getAndIncrement()
      Increments this instance's value by 1; this method returns the value associated with the instance immediately prior to the increment operation.
      java.lang.Integer getValue()
      Gets the value as a Integer instance.
      int hashCode()
      Returns a suitable hash code for this mutable.
      void increment()
      Increments the value.
      int incrementAndGet()
      Increments this instance's value by 1; this method returns the value associated with the instance immediately after the increment operation.
      int intValue()
      Returns the value of this MutableInt as an int.
      long longValue()
      Returns the value of this MutableInt as a long.
      void setValue​(int value)
      Sets the value.
      void setValue​(java.lang.Number value)
      Sets the value from any Number instance.
      void subtract​(int operand)
      Subtracts a value from the value of this instance.
      void subtract​(java.lang.Number operand)
      Subtracts a value from the value of this instance.
      java.lang.Integer toInteger()
      Gets this mutable as an instance of Integer.
      java.lang.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

      • MutableInt

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

      • MutableInt

        public MutableInt​(int value)
        Constructs a new MutableInt with the specified value.
        Parameters:
        value - the initial value to store

      • MutableInt

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

      • MutableInt

        public MutableInt​(java.lang.String value)
        Constructs a new MutableInt parsing the given string.
        Parameters:
        value - the string to parse, not null
        Throws:
        java.lang.NumberFormatException - if the string cannot be parsed into an int
        Since:
        2.5

    • Method Detail

      • getValue

        public java.lang.Integer getValue()
        Gets the value as a Integer instance.
        Specified by:
        getValue in interface Mutable<java.lang.Number>
        Returns:
        the value as a Integer, never null

      • setValue

        public void setValue​(int value)
        Sets the value.
        Parameters:
        value - the value to set

      • setValue

        public void setValue​(java.lang.Number value)
        Sets the value from any Number instance.
        Specified by:
        setValue in interface Mutable<java.lang.Number>
        Parameters:
        value - the value to set, not null
        Throws:
        java.lang.NullPointerException - if the object is null

      • increment

        public void increment()
        Increments the value.
        Since:
        2.2

      • getAndIncrement

        public int getAndIncrement()
        Increments this instance's value by 1; this method returns the value associated with the instance immediately prior to the increment operation. This method is not thread safe.
        Returns:
        the value associated with the instance before it was incremented
        Since:
        3.5

      • incrementAndGet

        public int incrementAndGet()
        Increments this instance's value by 1; this method returns the value associated with the instance immediately after the increment operation. This method is not thread safe.
        Returns:
        the value associated with the instance after it is incremented
        Since:
        3.5

      • decrement

        public void decrement()
        Decrements the value.
        Since:
        2.2

      • getAndDecrement

        public int getAndDecrement()
        Decrements this instance's value by 1; this method returns the value associated with the instance immediately prior to the decrement operation. This method is not thread safe.
        Returns:
        the value associated with the instance before it was decremented
        Since:
        3.5

      • decrementAndGet

        public int decrementAndGet()
        Decrements this instance's value by 1; this method returns the value associated with the instance immediately after the decrement operation. This method is not thread safe.
        Returns:
        the value associated with the instance after it is decremented
        Since:
        3.5

      • add

        public void add​(int operand)
        Adds a value to the value of this instance.
        Parameters:
        operand - the value to add, not null
        Since:
        2.2

      • add

        public void add​(java.lang.Number operand)
        Adds a value to the value of this instance.
        Parameters:
        operand - the value to add, not null
        Throws:
        java.lang.NullPointerException - if the object is null
        Since:
        2.2

      • subtract

        public void subtract​(int operand)
        Subtracts a value from the value of this instance.
        Parameters:
        operand - the value to subtract, not null
        Since:
        2.2

      • subtract

        public void subtract​(java.lang.Number operand)
        Subtracts a value from the value of this instance.
        Parameters:
        operand - the value to subtract, not null
        Throws:
        java.lang.NullPointerException - if the object is null
        Since:
        2.2

      • addAndGet

        public int addAndGet​(int operand)
        Increments this instance's value by operand; this method returns the value associated with the instance immediately after the addition operation. This method is not thread safe.
        Parameters:
        operand - the quantity to add, not null
        Returns:
        the value associated with this instance after adding the operand
        Since:
        3.5

      • addAndGet

        public int addAndGet​(java.lang.Number operand)
        Increments this instance's value by operand; this method returns the value associated with the instance immediately after the addition operation. This method is not thread safe.
        Parameters:
        operand - the quantity to add, not null
        Returns:
        the value associated with this instance after adding the operand
        Throws:
        java.lang.NullPointerException - if operand is null
        Since:
        3.5

      • getAndAdd

        public int getAndAdd​(int operand)
        Increments this instance's value by operand; this method returns the value associated with the instance immediately prior to the addition operation. This method is not thread safe.
        Parameters:
        operand - the quantity to add, not null
        Returns:
        the value associated with this instance immediately before the operand was added
        Since:
        3.5

      • getAndAdd

        public int getAndAdd​(java.lang.Number operand)
        Increments this instance's value by operand; this method returns the value associated with the instance immediately prior to the addition operation. This method is not thread safe.
        Parameters:
        operand - the quantity to add, not null
        Returns:
        the value associated with this instance immediately before the operand was added
        Throws:
        java.lang.NullPointerException - if operand is null
        Since:
        3.5

      • intValue

        public int intValue()
        Returns the value of this MutableInt as an int.
        Specified by:
        intValue in class java.lang.Number
        Returns:
        the numeric value represented by this object after conversion to type int.

      • longValue

        public long longValue()
        Returns the value of this MutableInt as a long.
        Specified by:
        longValue in class java.lang.Number
        Returns:
        the numeric value represented by this object after conversion to type long.

      • floatValue

        public float floatValue()
        Returns the value of this MutableInt as a float.
        Specified by:
        floatValue in class java.lang.Number
        Returns:
        the numeric value represented by this object after conversion to type float.

      • doubleValue

        public double doubleValue()
        Returns the value of this MutableInt as a double.
        Specified by:
        doubleValue in class java.lang.Number
        Returns:
        the numeric value represented by this object after conversion to type double.

      • toInteger

        public java.lang.Integer toInteger()
        Gets this mutable as an instance of Integer.
        Returns:
        a Integer instance containing the value from this mutable, never null

      • equals

        public boolean equals​(java.lang.Object obj)
        Compares this object to the specified object. The result is true if and only if the argument is not null and is a MutableInt object that contains the same int value as this object.
        Overrides:
        equals in class java.lang.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 java.lang.Object
        Returns:
        a suitable hash code

      • compareTo

        public int compareTo​(MutableInt other)
        Compares this mutable to another in ascending order.
        Specified by:
        compareTo in interface java.lang.Comparable<MutableInt>
        Parameters:
        other - the other mutable to compare to, not null
        Returns:
        negative if this is less, zero if equal, positive if greater

      • toString

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