Here you can find the source of getTimeZone(Calendar cal)
public static TimeZone getTimeZone(Calendar cal)
//package com.java2s; /*/*from w ww . j a va 2 s .c o m*/ * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to you 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.TimeZone; public class Main { /** The Java default time zone. */ public static final TimeZone DEFAULT_ZONE = TimeZone.getDefault(); /** * Gets the active time zone based on a Calendar argument */ public static TimeZone getTimeZone(Calendar cal) { if (cal == null) { return DEFAULT_ZONE; } return cal.getTimeZone(); } }