info.monitorenter.util.math
Class IntegerMutable

java.lang.Object
  info.monitorenter.util.math.IntegerMutable

public class IntegerMutable
extends java.lang.Object

Mutable Integer.

I needed an wrapper of an primitive int to share the same value between different instances and to have the changes made to the primitive value take effect on all owners of the same instance.

What a pity that java.lang.Integer does not allow to change it's internal value at runtime. Every time a new Integer has to be constructed.

Field Summary

static int	MAX_VALUE The largest value of type int.
static int	MIN_VALUE The smallest value of type int.

Constructor Summary

IntegerMutable(int value)
Constructs a newly allocated Integer object that represents the primitive int argument.

Method Summary

void	add(int i) Adds the given value to the internal value.
void	add(java.lang.Integer i) Adds the given value to the internal value.
void	add(IntegerMutable i) Adds the given value to the internal value.
boolean	equals(java.lang.Object obj)
int	getValue() Returns the value as an int.
int	hashCode()
int	intValue() Returns the value as an int.
void	setValue(int value) Sets the value.
void	sub(int i) Substracts the given value from the internal value.
void	sub(java.lang.Integer i) Substracts the given value from the internal value.
void	sub(IntegerMutable i) Substracts the given value from the internal value.
java.lang.String	toString() Returns a String object representing this Integer's value.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_VALUE

public static final int MAX_VALUE

The largest value of type int. The constant value of this field is 2147483647.

See Also:

Constant Field Values

MIN_VALUE

public static final int MIN_VALUE

The smallest value of type int. The constant value of this field is -2147483648.

See Also:

Constant Field Values

Constructor Detail

IntegerMutable

public IntegerMutable(int value)

Constructs a newly allocated Integer object that represents the primitive int argument.

Parameters:

value - the value to be represented by the Integer.

Method Detail

add

public void add(int i)
         throws java.lang.ArithmeticException

Adds the given value to the internal value.

Parameters:

i - the value to add.

Throws:

java.lang.ArithmeticException - if an overflow (Integer.MAX_VALUE) occurs.

add

public void add(java.lang.Integer i)
         throws java.lang.ArithmeticException

Adds the given value to the internal value.

Parameters:

i - the value to add.

Throws:

java.lang.ArithmeticException - if an overflow (Integer.MAX_VALUE) occurs.

add

public void add(IntegerMutable i)
         throws java.lang.ArithmeticException

Adds the given value to the internal value.

Parameters:

i - the value to add.

Throws:

java.lang.ArithmeticException - if an overflow (Integer.MAX_VALUE) occurs.

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

See Also:

Object.equals(java.lang.Object)

getValue

public int getValue()

Returns the value as an int.

Returns:

the value as an int.

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

See Also:

Object.hashCode()

intValue

public int intValue()

Returns the value as an int.

Returns:

the value as an int.

setValue

public void setValue(int value)

Sets the value.

Parameters:

value - the value.

sub

public void sub(int i)
         throws java.lang.ArithmeticException

Substracts the given value from the internal value.

Parameters:

i - the value to subtract.

Throws:

java.lang.ArithmeticException - if a carry (Integer.MIN_VALUE) occurs.

sub

public void sub(java.lang.Integer i)
         throws java.lang.ArithmeticException

Substracts the given value from the internal value.

Parameters:

i - the value to subtract.

Throws:

java.lang.ArithmeticException - if a carry (Integer.MIN_VALUE) occurs.

sub

public void sub(IntegerMutable i)
         throws java.lang.ArithmeticException

Substracts the given value from the internal value.

Parameters:

i - the value to subtract.

Throws:

java.lang.ArithmeticException - if a carry (Integer.MIN_VALUE) occurs.

toString

public java.lang.String toString()

Returns a String object representing this Integer'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 java.lang.Object

Returns:

a string representation of the value of this object in base 10.