1/* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24import java.util.*; 25import java.text.*; 26 27/** 28 * Test GregorianCalendar limits, which should not exist. 29 * @test 30 * @bug 4056585 31 * @summary Make sure that GregorianCalendar works far in the past and future. 32 * @author Alan Liu 33 */ 34public class Limit { 35 static final long ONE_DAY = 24*60*60*1000L; 36 37 public static void main(String args[]) throws Exception { 38 GregorianCalendar c = new GregorianCalendar(); 39 DateFormat fmt = new SimpleDateFormat("EEEE, MMMM dd, yyyy G", Locale.US); 40 long bigMillis = 300000000000000L; 41 42 try { 43 // We check two things: 44 // 1. That handling millis in the range of +/- bigMillis works. 45 // bigMillis is a value that used to blow up. 46 // 2. The round-trip format/parse works in these extreme areas. 47 c.setTime(new Date(-bigMillis)); 48 String s = fmt.format(c.getTime()); 49 Date d = fmt.parse(s); 50 if (Math.abs(d.getTime() + bigMillis) >= ONE_DAY) { 51 throw new Exception(s + " != " + fmt.format(d)); 52 } 53 54 c.setTime(new Date(+bigMillis)); 55 s = fmt.format(c.getTime()); 56 d = fmt.parse(s); 57 if (Math.abs(d.getTime() - bigMillis) >= ONE_DAY) { 58 throw new Exception(s + " != " + fmt.format(d)); 59 } 60 } catch (IllegalArgumentException | ParseException e) { 61 throw e; 62 } 63 } 64} 65