Package eu.bandm.tools.ops

Class RomanNumbers

java.lang.Object

eu.bandm.tools.ops.RomanNumbers

public class RomanNumbers
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String[]	hundreds
protected static final Map<Character,Integer>	romanLetterValues
protected static final String[]	tens
protected static final String[]	thousands
protected static final String[]	units

Constructor Summary

Constructors

Constructor	Description
RomanNumbers()

Method Summary

Modifier and Type	Method	Description
static @Opt String	int2roman(int num, boolean uppercase)	Public and Central Service Access Point.
static void	main(String[] args)
static final @Opt Integer	roman2integer(BiConsumer<String,Object[]> errorReceiver, String s, boolean lowercasesupported, boolean uppercasesupported, boolean subtractiveformat_directNeighbour, boolean subtractiveformat_fartherNeighbour)	Public and Central Service Access Point to convert a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

romanLetterValues

protected static final Map<Character,Integer> romanLetterValues

thousands

protected static final String[] thousands

hundreds

protected static final String[] hundreds

tens

protected static final String[] tens

units

protected static final String[] units

Constructor Details

RomanNumbers

public RomanNumbers()

Method Details

roman2integer

@Opt
public static final @Opt Integer roman2integer(BiConsumer<String,Object[]> errorReceiver,
 String s,
 boolean lowercasesupported,
 boolean uppercasesupported,
 boolean subtractiveformat_directNeighbour,
 boolean subtractiveformat_fartherNeighbour)

Public and Central Service Access Point to convert a string. Supports string in all uppercase or all lowercase. Does not support MIXED subtractive and additive (like "CCCCIV").
The subtractive digit must be a power of ten, so VL, VC, VD, VM, LD and LM are not supported. (Use XLV, XCV, XDV, XMV, CDL and CML instead.)

Parameters:

errorReceiver - for error text and argument array

s - the string to convert

lowercasesupported - whether the input may be in lower case only

uppercasesupported - whether the input may be in upper case only

subtractiveformat_directNeighbour - Whether the immediately smaller digit left of a digit means subtraction

subtractiveformat_fartherNeighbour - Whether ANY smaller digit left of a digit means subtraction

Returns:

null in case of error (after sending error message)

int2roman

@Opt
public static @Opt String int2roman(int num,
 boolean uppercase)

Public and Central Service Access Point. Delivers subtractive way of writing (IV, not IIII). MAXIMUM is currently MMMCMXCIX = 3999

Parameters:

num - the number to convert.

uppercase - whether to return in uppercase, not lowercase.

Returns:

the converted string, or null if limit 3999 is exceeded.

main

public static void main(String[] args)