Module org.jgrapht.core
Package org.jgrapht.util

Class ModifiableInteger

java.lang.Object
java.lang.Number
org.jgrapht.util.ModifiableInteger
All Implemented Interfaces:
Serializable, Comparable<ModifiableInteger>
public class ModifiableInteger extends Number implements Comparable<ModifiableInteger>
The ModifiableInteger class wraps a value of the primitive type int in an object, similarly to Integer. An object of type ModifiableInteger contains a single field whose type is int.

Unlike java.lang.Integer, the int value which the ModifiableInteger represents can be modified. It becomes useful when used together with the collection framework. For example, if you want to have a List of counters. You could use Integer but that would have became wasteful and inefficient if you frequently had to update the counters.

WARNING: Because instances of this class are mutable, great care must be exercised if used as keys of a Map or as values in a Set in a manner that affects equals comparisons while the instances are keys in the map (or values in the set). For more see documentation of Map and Set.

Author:
Barak Naveh
See Also:

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    int
    value
    The int value represented by this ModifiableInteger.

  • Constructor Summary

    Constructors
    Constructor
    Description
    ModifiableInteger()
    Deprecated.
    not really deprecated, just marked so to avoid mistaken use.
    ModifiableInteger(int value)
    Constructs a newly allocated ModifiableInteger object that represents the specified int value.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    compareTo(ModifiableInteger anotherInteger)
    Compares two ModifiableInteger objects numerically.
    void
    decrement()
    Subtracts one from the value of this modifiable integer.
    double
    doubleValue()
     
    boolean
    equals(Object o)
    Compares this object to the specified object.
    float
    floatValue()
     
    int
    getValue()
    Returns the value of this object, similarly to intValue().
    int
    hashCode()
    Returns a hash code for this ModifiableInteger.
    void
    increment()
    Adds one to the value of this modifiable integer.
    int
    intValue()
     
    long
    longValue()
     
    void
    setValue(int value)
    Sets a new value for this modifiable integer.
    Integer
    toInteger()
    Returns an Integer object representing this ModifiableInteger's value.
    String
    toString()
    Returns a String object representing this ModifiableInteger's value.

    Methods inherited from class java.lang.Number

    byteValue, shortValue

    Methods inherited from class java.lang.Object

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

  • Field Details

    • value

      public int value
      The int value represented by this ModifiableInteger.

  • Constructor Details

    • ModifiableInteger

      @Deprecated public ModifiableInteger()
      Deprecated.
      not really deprecated, just marked so to avoid mistaken use.
      !!! DON'T USE - Use the ModifiableInteger(int) constructor instead !!!

      This constructor is for the use of java.beans.XMLDecoder deserialization. The constructor is marked as 'deprecated' to indicate to the programmer against using it by mistake.

    • ModifiableInteger

      public ModifiableInteger(int value)
      Constructs a newly allocated ModifiableInteger object that represents the specified int value.
      Parameters:
      value - the value to be represented by the ModifiableInteger object.

  • Method Details

    • setValue

      public void setValue(int value)
      Sets a new value for this modifiable integer.
      Parameters:
      value - the new value to set.

    • getValue

      public int getValue()
      Returns the value of this object, similarly to intValue(). This getter is NOT redundant. It is used for serialization by java.beans.XMLEncoder.
      Returns:
      the value.

    • increment

      public void increment()
      Adds one to the value of this modifiable integer.

    • decrement

      public void decrement()
      Subtracts one from the value of this modifiable integer.

    • compareTo

      public int compareTo(ModifiableInteger anotherInteger)
      Compares two ModifiableInteger objects numerically.
      Specified by:
      compareTo in interface Comparable<ModifiableInteger>
      Parameters:
      anotherInteger - the ModifiableInteger to be compared.
      Returns:
      the value 0 if this ModifiableInteger is equal to the argument ModifiableInteger; a value less than 0 if this ModifiableInteger is numerically less than the argument ModifiableInteger; and a value greater than 0 if this ModifiableInteger is numerically greater than the argument ModifiableInteger (signed comparison).

    • doubleValue

      public double doubleValue()
      Specified by:
      doubleValue in class Number
      See Also:

    • equals

      public boolean equals(Object o)
      Compares this object to the specified object. The result is true if and only if the argument is not null and is an ModifiableInteger object that contains the same int value as this object.
      Overrides:
      equals in class Object
      Parameters:
      o - the object to compare with.
      Returns:
      true if the objects are the same; false otherwise.

    • floatValue

      public float floatValue()
      Specified by:
      floatValue in class Number
      See Also:

    • hashCode

      public int hashCode()
      Returns a hash code for this ModifiableInteger.
      Overrides:
      hashCode in class Object
      Returns:
      a hash code value for this object, equal to the primitive int value represented by this ModifiableInteger object.

    • intValue

      public int intValue()
      Specified by:
      intValue in class Number
      See Also:

    • longValue

      public long longValue()
      Specified by:
      longValue in class Number
      See Also:

    • toInteger

      public Integer toInteger()
      Returns an Integer object representing this ModifiableInteger's value.
      Returns:
      an Integer representation of the value of this object.

    • toString

      public String toString()
      Returns a String object representing this ModifiableInteger's value. The value is converted to signed decimal representation and returned as a string, exactly as if the integer value were given as an argument to the Integer.toString(int) method.
      Overrides:
      toString in class Object
      Returns:
      a string representation of the value of this object in base 10.