Here you can find the source of format(Date date)
public static String format(Date date)
//package com.java2s; //License from project: Apache License import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class Main { public static String format(Date date) { if (date == null) { return ""; }//from ww w . j a v a 2 s .co m DateFormat df = new SimpleDateFormat("yyyy-MM-dd"); return df.format(date); } public static String format(Date date, String pattern) { if (date == null) { return ""; } DateFormat df = new SimpleDateFormat(pattern); return df.format(date); } }