edu.northwestern.at.utils

Class MutableInteger

java.lang.Object

java.lang.Number

edu.northwestern.at.utils.MutableInteger

All Implemented Interfaces:

java.io.Serializable

public class MutableInteger
extends java.lang.Number
implements java.io.Serializable

Implements an integer object wrapper which allows changing the integer value.

The built-in Java Integer class does not allow changing the value of the wrapped integer value once the Integer object is created. MutableInteger provides most of the same methods as Integer but adds extra methods to allow changing the value of the stored integer. This is useful when wrapping integers for storage in collection types since it is much more efficient to update the value of an existing MutableInteger than to create a new Integer every time the value changes.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	mutableInteger The integer wrapped here.

Constructor Summary

Constructors

Constructor and Description
MutableInteger(int i) Create MutableInteger object from an int value.
MutableInteger(java.lang.String s) Create MutableInteger object from a string.

Method Summary

Methods

Modifier and Type	Method and Description
byte	byteValue()
int	compareTo(java.lang.Number number) Compares this number to another number.
int	compareTo(java.lang.Object obj) Compares this object to another object.
protected int	doCompare(int i, int j)
double	doubleValue()
boolean	equals(java.lang.Object obj)
float	floatValue()
int	hashCode()
int	intValue()
long	longValue()
void	setValue(byte aByte)
void	setValue(double d)
void	setValue(float f)
void	setValue(int i)
void	setValue(long l)
void	setValue(short aWord)
short	shortValue()
java.lang.Integer	toInteger()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

mutableInteger

protected int mutableInteger

The integer wrapped here.

Constructor Detail

MutableInteger

public MutableInteger(int i)

Create MutableInteger object from an int value.

Parameters:

i - The integer being wrapped.

MutableInteger

public MutableInteger(java.lang.String s)
               throws java.lang.NumberFormatException

Create MutableInteger object from a string.

Parameters:

s - String containing an integer value.

Throws:

java.lang.NumberFormatException

Method Detail

compareTo

public int compareTo(java.lang.Object obj)

Compares this object to another object.

Parameters:

obj - The other object.

compareTo

public int compareTo(java.lang.Number number)

Compares this number to another number.

Parameters:

number - The other number.

doCompare

protected int doCompare(int i,
            int j)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

byteValue

public byte byteValue()

Overrides:

byteValue in class java.lang.Number

shortValue

public short shortValue()

Overrides:

shortValue in class java.lang.Number

intValue

public int intValue()

Specified by:

intValue in class java.lang.Number

longValue

public long longValue()

Specified by:

longValue in class java.lang.Number

floatValue

public float floatValue()

Specified by:

floatValue in class java.lang.Number

doubleValue

public double doubleValue()

Specified by:

doubleValue in class java.lang.Number

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

setValue

public void setValue(byte aByte)

setValue

public void setValue(short aWord)

setValue

public void setValue(int i)

setValue

public void setValue(long l)

setValue

public void setValue(float f)

setValue

public void setValue(double d)

toInteger

public java.lang.Integer toInteger()