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Java example source code file (TimeParsing.java)

This example Java source code file (TimeParsing.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

date, derinputstream, exception, gen_fract1_plus1, gen_fract2_plus1, gen_fract3_comma_plus1, gen_fract3_zulu, gen_plus1, gen_zulu, ioexception, string, utc_minus1, utc_zulu, util, zulu

The TimeParsing.java Java example source code

/*
 * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 4558835 4915146
 * @summary Verify timezone offset and fractional seconds are correctly parsed
 */

import java.io.*;
import java.util.Date;

import sun.security.util.DerInputStream;

public class TimeParsing {

  // 10 Aug 2001 17:43:51 GMT
  private final static long TIME = 997465431000l;
  private final static long TIME_FRACT1 = 997465431700l;
  private final static long TIME_FRACT2 = 997465431760l;
  private final static long TIME_FRACT3 = 997465431765l;

  // 010810174351Z
  private final static byte[] UTC_ZULU =
    {0x17, 0x0d, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x37, 0x34, 0x33, 0x35, 0x31, 0x5a};

  // 010810184351+0100
  private final static byte[] UTC_PLUS1 =
    {0x17, 0x11, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x38, 0x34, 0x33, 0x35, 0x31, 0x2b, 0x30, 0x31, 0x30, 0x30};

  // 010810164351-0100
  private final static byte[] UTC_MINUS1 =
    {0x17, 0x11, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x36, 0x34, 0x33, 0x35, 0x31, 0x2d, 0x30, 0x31, 0x30, 0x30};

  // 20010810174351Z
  private final static byte[] GEN_ZULU =
    {0x18, 0x0f, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x37, 0x34, 0x33, 0x35, 0x31, 0x5a};

  // 20010810184351+0100
  private final static byte[] GEN_PLUS1 =
    {0x18, 0x13, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x38, 0x34, 0x33, 0x35, 0x31, 0x2b, 0x30, 0x31, 0x30, 0x30};

  // 20010810164351-0100
  private final static byte[] GEN_MINUS1 =
    {0x18, 0x13, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x36, 0x34, 0x33, 0x35, 0x31, 0x2d, 0x30, 0x31, 0x30, 0x30};

  // 20010810174351.7Z
  private final static byte[] GEN_FRACT1_ZULU =
    {0x18, 0x11, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x37, 0x34, 0x33, 0x35, 0x31, 0x2e, 0x37, 0x5a};

  // 20010810174351.76Z
  private final static byte[] GEN_FRACT2_ZULU =
    {0x18, 0x12, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x37, 0x34, 0x33, 0x35, 0x31, 0x2e, 0x37, 0x36, 0x5a};

  // 20010810174351.765Z
  private final static byte[] GEN_FRACT3_ZULU =
    {0x18, 0x13, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x37, 0x34, 0x33, 0x35, 0x31, 0x2e, 0x37, 0x36, 0x35, 0x5a};

  // 20010810184351.7+0100
  private final static byte[] GEN_FRACT1_PLUS1 =
    {0x18, 0x15, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x38, 0x34, 0x33, 0x35, 0x31, 0x2e, 0x37, 0x2b, 0x30, 0x31, 0x30, 0x30};

  // 20010810184351.76+0100
  private final static byte[] GEN_FRACT2_PLUS1 =
    {0x18, 0x16, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x38, 0x34, 0x33, 0x35, 0x31, 0x2e, 0x37, 0x36, 0x2b, 0x30, 0x31, 0x30, 0x30};

  // 20010810184351.765+0100
  private final static byte[] GEN_FRACT3_PLUS1 =
    {0x18, 0x17, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x38, 0x34, 0x33, 0x35, 0x31, 0x2e, 0x37, 0x36, 0x35, 0x2b, 0x30, 0x31, 0x30, 0x30};

  // 20010810184351,765+0100
  private final static byte[] GEN_FRACT3_COMMA_PLUS1 =
    {0x18, 0x17, 0x32, 0x30, 0x30, 0x31, 0x30, 0x38, 0x31, 0x30, 0x31, 0x38, 0x34, 0x33, 0x35, 0x31, 0x2c, 0x37, 0x36, 0x35, 0x2b, 0x30, 0x31, 0x30, 0x30};


  private static Date decodeUTC(byte[] b) throws IOException {
    DerInputStream derin = new DerInputStream(b);
    return derin.getUTCTime();
  }

  private static Date decodeGeneralized(byte[] b) throws IOException {
    DerInputStream derin = new DerInputStream(b);
    return derin.getGeneralizedTime();
  }

  private static  void checkUTC(Date d0, byte[] b, String text) throws Exception {
    Date d1 = decodeUTC(b);
    if( !d0.equals(d1) ) {
      throw new Exception("UTCTime " + text + " failed: " + d1.toGMTString());
    } else {
      System.out.println("UTCTime " + text + " ok");
    }
  }

  private static  void checkGeneralized(Date d0, byte[] b, String text) throws Exception {
    Date d1 = decodeGeneralized(b);
    if( !d0.equals(d1) ) {
      throw new Exception("GeneralizedTime " + text + " failed: " + d1.toGMTString());
    } else {
      System.out.println("GeneralizedTime " + text + " ok");
    }
  }

  public static void main(String args[]) throws Exception {
    Date d0 = new Date(TIME);
    System.out.println(d0.toGMTString());

    checkUTC(d0, UTC_ZULU, "Zulu");
    checkUTC(d0, UTC_PLUS1, "+0100");
    checkUTC(d0, UTC_MINUS1, "-0100");

    checkGeneralized(d0, GEN_ZULU, "Zulu");
    checkGeneralized(d0, GEN_PLUS1, "+0100");
    checkGeneralized(d0, GEN_MINUS1, "-0100");

    Date d1 = new Date(TIME_FRACT1);
    checkGeneralized(d1, GEN_FRACT1_ZULU, "fractional seconds (Zulu)");
    checkGeneralized(d1, GEN_FRACT1_PLUS1, "fractional seconds (+0100)");

    Date d2 = new Date(TIME_FRACT2);
    checkGeneralized(d2, GEN_FRACT2_ZULU, "fractional seconds (Zulu)");
    checkGeneralized(d2, GEN_FRACT2_PLUS1, "fractional seconds (+0100)");

    Date d3 = new Date(TIME_FRACT3);
    checkGeneralized(d3, GEN_FRACT3_ZULU, "fractional seconds (Zulu)");
    checkGeneralized(d3, GEN_FRACT3_PLUS1, "fractional seconds (+0100)");
    checkGeneralized(d3, GEN_FRACT3_COMMA_PLUS1, "fractional seconds (+0100)");
  }

}

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