Validar Cedula en Java

import java.util.Scanner;
public class ValidarCedula {

public static void main(String[] args) {

Scanner entrada = new Scanner(System.in);
String ncedula;
System.out.println("Ingrese el numero de cedula");
ncedula=entrada.next();

int cedula[] = new int[ncedula.length()];
int res=0;

if (cedula.length==10)
{
for (int i=0;i<cedula.length;i++)
{
cedula[i]=Integer.parseInt(String.valueOf(ncedula.charAt(i) ));
int r=i%2;

if (r==0)
{
cedula[i]=cedula[i]*2;
if (cedula[i]>9)
cedula[i]=cedula[i]-9;
}

}

for (int i=0;i<cedula.length-1;i++)
{
res=res+cedula[i];
}

res=res%10;

if (res!=0)
res=10-res;

if (res==cedula[9])
System.out.println("CEDULA VALIDA");
else
System.out.println("CEDULA INVALIDA");
}
else
System.out.println("CEDULA INVALIDA");
}
}