1 /* 2 * Copyright (c) 2005, 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 24 /* 25 * @test 26 * @bug 4296930 5033603 7092679 27 * @summary Make sure that Java runtime detects the platform time zone 28 * correctly. Also make sure that the system time zone detection code 29 * detects the "Automatically adjust clock for daylight saving 30 * changes" setting correctly on Windows. 31 * @run applet/manual=yesno DefaultTimeZoneTest.html 32 */ 33 34 import javax.swing.*; 35 import java.awt.*; 36 import java.awt.event.*; 37 import java.text.*; 38 import java.util.*; 39 40 public class DefaultTimeZoneTest extends JApplet implements Runnable { 41 static final String FORMAT = "yyyy-MM-dd HH:mm:ss zzzz (XXX)"; 42 JLabel tzid; 43 JLabel label; 44 SimpleDateFormat sdf = new SimpleDateFormat(FORMAT); 45 JButton button = new JButton("English"); 46 Thread clock; 47 boolean english = false; 48 49 @Override init()50 public void init() { 51 tzid = new JLabel("Time zone ID: " + sdf.getTimeZone().getID(), SwingConstants.CENTER); 52 tzid.setAlignmentX(Component.CENTER_ALIGNMENT); 53 label = new JLabel(sdf.format(new Date()), SwingConstants.CENTER); 54 label.setAlignmentX(Component.CENTER_ALIGNMENT); 55 button.addActionListener(new ActionListener() { 56 @Override 57 @SuppressWarnings("deprecation") 58 public void actionPerformed(ActionEvent e) { 59 english = (english == false); 60 Locale loc = english ? Locale.US : Locale.getDefault(); 61 sdf = new SimpleDateFormat(FORMAT, loc); 62 button.setLabel(!english ? "English" : "Local"); 63 } 64 }); 65 button.setAlignmentX(Component.CENTER_ALIGNMENT); 66 JPanel panel = new JPanel(); 67 panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS)); 68 panel.add(Box.createRigidArea(new Dimension(0, 10))); 69 panel.add(tzid); 70 panel.add(Box.createRigidArea(new Dimension(0, 5))); 71 panel.add(label); 72 panel.add(Box.createRigidArea(new Dimension(0, 10))); 73 panel.add(button); 74 getContentPane().add(panel); 75 } 76 77 @Override start()78 public void start() { 79 clock = new Thread(this); 80 clock.start(); 81 } 82 83 @Override stop()84 public void stop() { 85 clock = null; 86 } 87 88 @Override run()89 public void run() { 90 Thread me = Thread.currentThread(); 91 92 while (clock == me) { 93 // Reset the default time zone so that 94 // TimeZone.getDefault will detect the platform time zone 95 TimeZone.setDefault(null); 96 System.setProperty("user.timezone", ""); 97 TimeZone tz = TimeZone.getDefault(); 98 sdf.setTimeZone(tz); 99 tzid.setText("Time zone ID: " + tz.getID()); 100 label.setText(sdf.format(new Date())); 101 repaint(); 102 try { 103 Thread.sleep(1000); 104 } catch (InterruptedException e) { 105 } 106 } 107 } 108 } 109