Write a program in Java that converts a number entered in Roman numerals to deci

Question

Write a program in Java that converts a number entered in Roman numerals to decimal. The program should consist of a class, say Roman. An object of type Roman should do the following (which means these are methods in the class):

a. Store the number as a Roman numeral.

b. Convert and store the number into decimal.

c. print the number as a Roman numeral or decimal number as requested by the user.

The decimal values of the Roman numerals are:

Roman    Decimal

M            1000

D            500

C            100

L            50

X            10

V            5

I             1

d. The class must contain the method romanToDecimal to convert a Roman numeral into its equivalent decimal number.

e. Write a TestClient to test the class program using the following Roman numerals. The user enters in: MCXIV, CCCLIX, and MDCLXVI

Explanation / Answer

import java.io.IOException;

import com.esotericsoftware.kryonet.Client;

class Roman numeral

public static int romanConvert(String roman)
{
int decimal = 0;

String romanNumeral = roman.toUpperCase();
for(int x = 0;x<romanNumeral.length();x++)
{
char convertToDecimal = roman.charAt(x);

switch (convertToDecimal)
{
case 'M':
decimal += 1000;
break;

case 'D':
decimal += 500;
break;

case 'C':
decimal += 100;
break;

case 'L':
decimal += 50;
break;

case 'X':
decimal += 10;
break;

case 'V':
decimal += 5;
break;

case 'I':
decimal += 1;
break;
}
}

if (romanNumeral.contains("IV"))

{
decimal-=2;
}
if (romanNumeral.contains("IX"))
{
decimal-=2;
}
if (romanNumeral.contains("XL"))
{
decimal-=10;
}
if (romanNumeral.contains("XC"))
{
decimal-=10;
}
if (romanNumeral.contains("CD"))
{
decimal-=100;
}
if (romanNumeral.contains("CM"))
{
decimal-=100;
}
return decimal;
}

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