Decimal to Roman Conversion

import java.io.*;
public class Dec2Roman
{
public static void main() throws IOException//main function
{
DataInputStream in=new DataInputStream(System.in);
System.out.print("Enter Number : ");
int num=Integer.parseInt(in.readLine());//accepting decimal number
String hund[]={"","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"};
String ten[]={"","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"};
String unit[]={"","I","II","III","IV","V","VI","VII","VIII","IX"};/*Displaying equivalent roman number*/
System.out.println("Roman Equivalent= "+hund[num/100]+ten[(num/10)%10]+unit[num%10]);
}}