How to format seconds?

JAVA Program

import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
	public static void main(String[] args) {
		Date date = new Date();
		SimpleDateFormat sdf = new SimpleDateFormat("ss");
		System.out.println("seconds in ss format : "+ sdf.format(date));
	}
}

Output

seconds in ss format : 14