Here you can find the source of formatDate(Date date, String pattern)
public static String formatDate(Date date, String pattern)
//package com.java2s; //License from project: Apache License import java.text.SimpleDateFormat; import java.util.*; public class Main { public static String formatDate(Date date, String pattern) { if (pattern == null || pattern.equals("") || pattern.equals("null")) { pattern = "yyyy-MM-dd"; }//from w w w. ja v a 2s. c o m SimpleDateFormat sdf = new SimpleDateFormat(pattern); return sdf.format(date); } /** * Returns a string the represents the passed-in date parsed according to * the passed-in format. Returns an empty string if the date or the format * is null. **/ public static String format(Date aDate, SimpleDateFormat aFormat) { if (aDate == null || aFormat == null) { return ""; } synchronized (aFormat) { return aFormat.format(aDate); } } }