Here you can find the source of dateFmtToString(Date date, SimpleDateFormat fmt)
public static String dateFmtToString(Date date, SimpleDateFormat fmt)
//package com.java2s; /**//from w ww .j a v a 2s . c om The MIT License (MIT) * Copyright (c) 2015 ???? * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of * the Software, and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Main { private int year; private int month; private int day; private int hour; private int minute; private int second; public static String dateFmtToString(Date date, SimpleDateFormat fmt) { return fmt.format(date); } public static String dateFmtToString(Date date) { return new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(date); } public static String dateFmtToString(Date date, String fmt) { return new SimpleDateFormat(fmt).format(date); } public String format(SimpleDateFormat df) { Calendar calendar = Calendar.getInstance(); calendar.set(this.year, this.month - 1, this.day, this.hour, this.minute, this.second); return df.format(calendar.getTime()); } }