plz provide upper and lower bound

how you solve this.i got time limit

getting "DescendingOrder.java:30: error: reached end of file while parsing" but it seems my code work fine.
whats wrong here?
import java.util.ArrayList;
import java.util.Collections;
public class DescendingOrder {
public static int sortDesc(final int num) {
ArrayList list = new ArrayList();
StringBuilder stringBuilder = new StringBuilder();
int num1 = num;
if (num1 < 10) {
return num1;
} else {
while (num1 != 0) {
int n = num1 % 10;
num1 = num1 / 10;
list.add(n);

        }
        Collections.sort(list);
        Collections.reverse(list);
        int len = list.size();
        //System.out.println(len);
        for (Integer i : list
                ) {
            stringBuilder.append(String.valueOf(i));

        }
        String s = stringBuilder.toString();
        int n = Integer.parseInt(s);
        return n;

}
}