Examples.java

/*
 * Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 *  * Neither the name of JSR-310 nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package javax.time;

import static java.time.Month.DECEMBER;
import static java.time.calendrical.ChronoField.DAY_OF_MONTH;
import static java.time.calendrical.ChronoField.DAY_OF_YEAR;
import static java.time.calendrical.ChronoField.MONTH_OF_YEAR;
import static java.time.calendrical.ChronoField.YEAR;
import static java.time.calendrical.DateTimeAdjusters.lastDayOfMonth;

import java.time.Clock;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.MonthDay;
import java.time.Year;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.format.DateTimeFormatters;
import java.time.format.SignStyle;
import java.util.Locale;

/**
 * Examples for this project.
 */
public class Examples {

  /**
   * Main method.
   * 
   * @param args no arguments needed
   */
  public static void main(String[] args) {

    Clock clock = Clock.systemDefaultZone();

    ZonedDateTime zdt = ZonedDateTime.now(clock);
    System.out.println("Current date-time: " + zdt);

    ZonedDateTime zdtNewYork = ZonedDateTime.now(Clock.system(ZoneId.of("America/New_York")));
    System.out.println("Current date-time in New York: " + zdtNewYork);

    ZonedDateTime zdtParis = ZonedDateTime.now(Clock.system(ZoneId.of("Europe/Paris")));
    System.out.println("Current date-time in Paris: " + zdtParis);

    LocalDateTime ldt = LocalDateTime.now(clock);
    System.out.println("Current local date-time: " + ldt);

    Year year = Year.now(clock);
    System.out.println("Year: " + year.getValue());

    LocalDate today = LocalDate.now(clock);
    System.out.println("Today: " + today);

    System.out.println("Current day-of-year: " + today.get(DAY_OF_YEAR));

    LocalTime time = LocalTime.now(clock);
    System.out.println("Current time of day: " + time);

    LocalDate later = LocalDate.now(clock).plusMonths(2).plusDays(3);
    System.out.println("Two months three days after today: " + later);

    // ISOPeriod period = ISOPeriod.of(3, MONTHS);
    // LocalDate moreLater = LocalDate.now(clock).plus(period);
    // System.out.println("Period " + period + " after today : " + moreLater);

    LocalDate dec = LocalDate.now(clock).with(DECEMBER);
    System.out.println("Change to same day in December: " + dec);

    LocalDate lastDayOfMonth = LocalDate.now(clock).with(lastDayOfMonth());
    System.out.println("Last day of month: " + lastDayOfMonth);

    // / LocalDate tempDate = LocalDate.now(clock);
    // DateTimeFields fri13matcher = DateTimeFields.of(
    // DAY_OF_WEEK, FRIDAY.getValue(), DAY_OF_MONTH, 13);
    // boolean fri13 = fri13matcher.matches(tempDate);
    // System.out.println("Is Friday the Thirteenth: " + fri13);

    LocalDateTime dt = LocalDateTime.of(2008, 3, 30, 1, 30);
    System.out.println("Local date-time in Spring DST gap: " + dt);

    ZonedDateTime resolved = ZonedDateTime.of(dt, ZoneId.of("Europe/London"));
    System.out.println("...resolved to valid date-time in Europe/London: " + resolved);

    String formattedRFC = DateTimeFormatters.rfc1123().print(resolved);
    System.out.println("...printed as RFC1123: " + formattedRFC);

    DateTimeFormatter f = new DateTimeFormatterBuilder().appendValue(YEAR, 4, 10, SignStyle.ALWAYS).appendLiteral(' ')
        .appendText(MONTH_OF_YEAR).appendLiteral('(').appendValue(MONTH_OF_YEAR).appendLiteral(')').appendLiteral(' ')
        .appendValue(DAY_OF_MONTH, 2).toFormatter(Locale.ENGLISH);
    String formatted = f.print(resolved);
    System.out.println("...printed using complex format: " + formatted);

    MonthDay bday = MonthDay.of(DECEMBER, 3);
    System.out.println("Brazillian birthday (no year): " + bday);
  }

}