Here you can find the source of shiftDate(Date date, TimeZone timeZone, String pattern)
public static Date shiftDate(Date date, TimeZone timeZone, String pattern)
//package com.java2s; /*// w ww .j a va 2s .c o m * Copyright 2012 Evgeny Dolganov (evgenij.dolganov@gmail.com). * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.TimeZone; public class Main { public static Date shiftDate(Date date, TimeZone timeZone, String pattern) { if ((timeZone == null) || (date == null)) return date; SimpleDateFormat sdf = new SimpleDateFormat(pattern); String s = sdf.format(date); sdf.setTimeZone(timeZone); try { return sdf.parse(s); } catch (ParseException e) { return date; } } }