Here you can find the source of getTimeAfter(int field, int amount, String formatStr)
public static String getTimeAfter(int field, int amount, String formatStr)
//package com.java2s; /**// w w w . ja v a 2s . com * Project: szs-demo * * File Created at 2016?8?19? * chiukong * * Copyright 2015 Dafy Finance Corporation Limited. * All rights reserved. * * This software is the confidential and proprietary information of * Dafy Finance Company. ("Confidential Information"). You shall not * disclose such Confidential Information and shall use it only in * accordance with the terms of the license agreement you entered into * with http://www.dafy.com. */ import java.text.SimpleDateFormat; import java.util.Calendar; public class Main { public static String getTimeAfter(int field, int amount, String formatStr) { Calendar cal = Calendar.getInstance(); cal.add(field, amount); SimpleDateFormat sp = new SimpleDateFormat(formatStr); return sp.format(cal.getTime()); } }