Here you can find the source of getCertificateEndDate(int days)
private static Date getCertificateEndDate(int days)
//package com.java2s; /* Copyright (c) 1996-2015, OPC Foundation. All rights reserved. The source code in this file is covered under a dual-license scenario: - RCL: for OPC Foundation members in good-standing - GPL V2: everybody else/*from w w w .ja va 2s .c o m*/ RCL license terms accompanied with this source code. See http://opcfoundation.org/License/RCL/1.00/ GNU General Public License as published by the Free Software Foundation; version 2 of the License are accompanied with this source code. See http://opcfoundation.org/License/GPLv2 This source code is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */ import java.util.Calendar; import java.util.Date; public class Main { private static Date getCertificateEndDate(int days) { Calendar expiryTime = Calendar.getInstance(); expiryTime.add(Calendar.DAY_OF_YEAR, days); return expiryTime.getTime(); } }