public class Roman
{
    private String romanNum;
    private int decimalNum;

    public Roman()
    {
       romanNum = "I";
       decimalNum = 1;
    }

    public Roman(String rString)
    {
        romanNum = rString;
      	romanToDecimal();
    }

    public void printDecimal()
    {
        System.out.println(decimalNum);
    }

    public void printRoman()
    {
     	System.out.println(romanNum);
    }

    public void setRoman(String rString)
    {
        romanNum = rString;
        romanToDecimal();
    }

    public String getRoman()
    {
        return romanNum;
    }

    public void romanToDecimal()
    {
      	int sum = 0;
      	int len =  romanNum.length();
      	int i;

       	int previous = 1000;

      	for (i = 0; i < len; i++)
      	{
         	switch (romanNum.charAt(i))
         	{
         	case 'M': sum = sum + 1000;
                      if (previous < 1000)
                          sum = sum -  2 * previous;
                      previous = 1000;
                      break;
         	case 'D': sum = sum + 500;
                      if (previous < 500)
                          sum = sum - 2 * previous;
                      previous = 500;
                      break;
         	case 'C': sum = sum + 100;
                      if (previous < 100)
                          sum = sum - 2 * previous;
                      previous = 100;
                      break;
         	case 'L': sum = sum + 50;
                      if (previous < 50)
                          sum = sum - 2 * previous;
                      previous = 50;
                      break;
         	case 'X': sum = sum + 10;
                      if (previous < 10)
                          sum = sum - 2 * previous;
                      previous = 10;
                      break;
         	case 'V': sum = sum + 5;
                      if (previous < 5)
                          sum = sum - 2 * previous;
                      previous = 5;
                      break;
         	case 'I': sum = sum + 1;
                      previous = 1;
         	}
 		}

 		decimalNum = sum;
    }
}