Here you can find the source of parseTimeZone(String timeZoneStr)
public static ZoneId parseTimeZone(String timeZoneStr)
//package com.java2s; /**/*from w ww.j a v a 2s . 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 * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * 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.time.DateTimeException; import java.time.ZoneId; public class Main { public static ZoneId parseTimeZone(String timeZoneStr) { if (timeZoneStr == null || timeZoneStr.trim().isEmpty() || timeZoneStr.trim().toLowerCase().equals("local")) { // default return ZoneId.systemDefault(); } try { return ZoneId.of(timeZoneStr); } catch (DateTimeException e1) { // default throw new RuntimeException("Invalid time zone displacement value"); } } }