Java SimpleDateFormat create file name

import java.text.SimpleDateFormat;

import java.util.Date;

public class Main {
    public static void main(String[] argv) throws Exception {
        System.out.println(getPhotoFileName());
    }//  w w  w  .  ja v  a  2  s  .  c o  m

    public static String getPhotoFileName() {
        Date date = new Date(System.currentTimeMillis());
        SimpleDateFormat dateFormat = new SimpleDateFormat("'IMG'_yyyy-MM-dd-HH-mm-ss");
        return dateFormat.format(date);
    }
}