Here you can find the source of toUTC(Date date)
public static Date toUTC(Date date)
//package com.java2s; /**//from w w w .j a v a 2 s . c o m * Copyright (C) 2015 Red Hat, Inc. (jcasey@redhat.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.util.Calendar; import java.util.Date; import java.util.TimeZone; public class Main { public static Date toUTC(Date date) { if (date == null) { return null; } Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.setTimeZone(TimeZone.getTimeZone("UTC")); return cal.getTime(); } }