net.lucidviews.util
Class Counter

java.lang.Object
  java.lang.Number
      net.lucidviews.util.VariableNumber
          net.lucidviews.util.VariableLong
              net.lucidviews.util.Counter

All Implemented Interfaces:

java.io.Serializable

public class Counter

extends VariableLong

A number object used for counting.

Since:

1.1

Version:

$Revision: 1.1 $

Author:

Stephen Battey

See Also:

VariableLong, Serialized Form

Field Summary

Fields inherited from class net.lucidviews.util.VariableLong

Fields inherited from class net.lucidviews.util.VariableNumber

Fields inherited from class java.lang.Number

Constructor Summary

Counter()
Create a new counter.

Counter(long value)
Create a new counter with a given initial value.

Counter(java.lang.Number value)
Create a new counter with a given initial value.

Method Summary

void	decrement() Decrement the value of this counter.
void	increment() Increment the value of this counter.

Methods inherited from class net.lucidviews.util.VariableLong

doubleValue, equals, floatValue, hashCode, intValue, longValue, setValueInternal, setValueInternal, setValueInternal, setValueInternal, toString

Methods inherited from class net.lucidviews.util.VariableNumber

isSecure, secure, setValue, setValue, setValue, setValue, setValue, setValue, setValueInternal, setValueInternal, verifyNotSecure

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

Counter

public Counter()

Create a new counter.
The counter is initialised with a zero value.

Counter

public Counter(long value)

Create a new counter with a given initial value.

Parameters:

value - the initial value

Counter

public Counter(java.lang.Number value)

Create a new counter with a given initial value.

Parameters:

value - the initial value

Throws:

java.lang.NullPointerException - if the initial value is null

Method Detail

increment

public void increment()

Increment the value of this counter.
If the number is secure an exception will be thrown.

Throws:

java.lang.IllegalStateException - if this number is no longer in a variable state

See Also:

VariableNumber.secure, VariableNumber.secure()

decrement

public void decrement()

Decrement the value of this counter.
If the number is secure an exception will be thrown.

Throws:

java.lang.IllegalStateException - if this number is no longer in a variable state

See Also:

VariableNumber.secure, VariableNumber.secure()