Project Euler - Java

package euler;

public class Pr4 {
public static void main(String [] args){

    long start = System.currentTimeMillis();

    for(int o = 900; o<999; o++){
        for(int n = 900; n<999; n++){
                int vin = o*n;
                 String m = Integer.toString(vin);
                 String s2 = new StringBuffer(m).reverse().toString();

               if( m.equals(s2)){
                System.out.println(s2);}
    }
    }
  double stop = (double)((System.currentTimeMillis() - start)/1000);
}
}