Java Data Type - 如何从数字字符串更改为日期字符串

import java.text.SimpleDateFormat;
import java.util.Date;

public class Main {
    public static void main(String[] args) {
        String maxDate = "15012009";
        SimpleDateFormat fromFormat = new SimpleDateFormat("ddMMyyyy");
        SimpleDateFormat toFormat = new SimpleDateFormat("MMMM dd, yyyy");
        Date date = null;
        try {
            date = fromFormat.parse(maxDate);
        } catch (java.text.ParseException e) {
            e.printStackTrace();
        }
        System.out.println("formated date:-" + toFormat.format(date));
    }
}