Convert Number to Roman Letter using Java

import java.util.*;
class Roman
 {
int number;
String romanNumber;
Roman(int dec, String rom) {
this.number = dec;
this.romanNumber = rom;
}
}
public class NumberToRoman {
public static void main(String[] args) {
NumberToRoman dec=new NumberToRoman ();
System.out.println("Enter Number");
Scanner input=new Scanner(System.in);
int num = input.nextInt();

String roman = dec.convertIntegerToRoman(num);
System.out.println("Roman Number is: "+roman);
}
final static Roman[] table = {
new Roman(1000, "M"),
new Roman( 900, "CM"),
new Roman( 500, "D"),
new Roman( 400, "CD"),
new Roman( 100, "C"),
new Roman( 90, "XC"),
new Roman( 50, "L"),
new Roman( 40, "XL"),
new Roman( 10, "X"),
new Roman( 9, "IX"),
new Roman( 5, "V"),
new Roman( 4, "IV"),
new Roman( 1, "I")
};
public static String convertIntegerToRoman(int n) {
if (n >= 5000 || n < 1) {
System.out.println("Numbers must be in range 1-4999");
}
StringBuffer buffer = new StringBuffer(10);
for (Roman rvalue : table) {
while (n >= rvalue.number) {
n -= rvalue.number;
buffer.append(rvalue.romanNumber);
}
}
return buffer.toString();
}
}