Checks if two calendar objects represent the same local time. : Calendar Date « Development Class « Java

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Java » Development Class » Calendar Date Screenshots  Checks if two calendar objects represent the same local time.     import java.math.BigDecimal; import java.math.BigInteger; import java.util.Calendar; import java.util.Date; /**  * 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  *  *     http://www.apache.org/licenses/LICENSE-2.0  *  * 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.  */ /**  * <p>A suite of utilities surrounding the use of the  * {@link java.util.Calendar} and {@link java.util.Date} object.</p>  *   * <p>DateUtils contains a lot of common methods considering manipulations  * of Dates or Calendars. Some methods require some extra explanation.  * The truncate and round methods could be considered the Math.floor(),  * Math.ceil() or Math.round versions for dates  * This way date-fields will be ignored in bottom-up order.  * As a complement to these methods we've introduced some fragment-methods.  * With these methods the Date-fields will be ignored in top-down order.  * Since a date without a year is not a valid date, you have to decide in what  * kind of date-field you want your result, for instance milliseconds or days.  * </p>  *     *     *  * @author <a href="mailto:sergek@lokitech.com">Serge Knystautas</a>  * @author Stephen Colebourne  * @author Janek Bogucki  * @author <a href="mailto:ggregory@seagullsw.com">Gary Gregory</a>  * @author Phil Steitz  * @author Robert Scholte  * @since 2.0  * @version $Id: DateUtils.java 634096 2008-03-06 00:58:11Z niallp $  */ public class Main {   //-----------------------------------------------------------------------   /**    * <p>Checks if two calendar objects represent the same local time.</p>    *    * <p>This method compares the values of the fields of the two objects.    * In addition, both calendars must be the same of the same type.</p>    *     * @param cal1  the first calendar, not altered, not null    * @param cal2  the second calendar, not altered, not null    * @return true if they represent the same millisecond instant    * @throws IllegalArgumentException if either date is <code>null</code>    * @since 2.1    */   public static boolean isSameLocalTime(Calendar cal1, Calendar cal2) {       if (cal1 == null || cal2 == null) {           throw new IllegalArgumentException("The date must not be null");       }       return (cal1.get(Calendar.MILLISECOND) == cal2.get(Calendar.MILLISECOND) &&               cal1.get(Calendar.SECOND) == cal2.get(Calendar.SECOND) &&               cal1.get(Calendar.MINUTE) == cal2.get(Calendar.MINUTE) &&               cal1.get(Calendar.HOUR) == cal2.get(Calendar.HOUR) &&               cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR) &&               cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR) &&               cal1.get(Calendar.ERA) == cal2.get(Calendar.ERA) &&               cal1.getClass() == cal2.getClass());   } }                  Related examples in the same category 1.  Create a Date object using the Calendar class 2.  When does the UNIX date get into trouble 3.  Trivial class to show use of Date and Calendar objects 4.  Convert longs (time_t in UNIX terminology) to seconds 5.  Show use of Calendar objects 6.  How quickly can you press return 7.  Easter - compute the day on which Easter falls 8.  Show use of Calendar get() method with various parameters 9.  TimeComputation for processing sqrt and Input and Output operations. 10.  Bean to display a month calendar in a JPanel 11.  Show some date uses 1 12.  Show dates before 1970 13.  Compare Dates 14.  Compare File Dates 15.  If a date is after another date 16.  If a date is before another date 17.  Compute days between 2 dates 18.  Show some calendar calculations 19.  The best way to format a date/time is to use 20.  Create SimpleDateFormats from a string read from a file 21.  DateCalAdd -- compute the difference between two dates 22.  Show some date uses 23.  Calendar Demo 24.  DateDiff -- compute the difference between two dates 25.  DateAdd -- compute the difference between two dates 26.  Increment and Decrement a Date Using the Calendar Class 27.  Increment and Decrement Months Using the Calendar Class 28.  Add or subtract days to current date using Java Calendar 29.  Subtract days from current date using Calendar.add method 30.  Add hours to current date using Calendar.add method 31.  Subtract hours from current date using Calendar.add method 32.  Add minutes to current date using Calendar.add method 33.  Subtract minutes from current date using Calendar.add method 34.  Add months to current date using Calendar.add method 35.  Subtract months from current date using Calendar.add method 36.  Add seconds to current date using Calendar.add method 37.  Subtract seconds from current time using Calendar.add method 38.  Add week to current date using Calendar.add method 39.  Add hours, minutes or seconds to a date 40.  Subtract week from current date 41.  Add year to current date using Calendar.add method 42.  Add 10 months to the calendar 43.  Subtract 1 year from the calendar 44.  Subtract year from current date 45.  Calendar adjust date automatically 46.  Display Day of Week using Java Calendar 47.  Display Month of year using Java Calendar 48.  Display full date time 49.  Get a List of Month Names 50.  Get current date, year and month 51.  Get Week of month and year using Java Calendar 52.  Get the number of days in that month 53.  Get the current month name 54.  Get day, month, year value from the current date 55.  Convert day of the year to date 56.  Pass the year information to the calendar object 57.  Get the last date of a month 58.  Convert day of year to day of month 59.  Determine the day of the week 60.  Set with GregorianCalendar.YEAR, MONTH and DATE 61.  Determine if an hour is between an interval 62.  Parse a String to obtain a Date/GregorianCalendar object 63.  Try month in a leap year 64.  Determining If a Year Is a Leap Year 65.  Determining the Day-of-Week for a Particular Date 66.  Subtract 30 days from the calendar 67.  Date Format Test 68.  Date and time with month 69.  Date and time with day and month fully spelled-out 70.  Formatting the Time Using a Custom Format 71.  Convert string date to long value 72.  Display date with a short day and month name 73.  Convert Date to String 74.  Validate a date Using DateFormat 75.  Get the day name 76.  Use the SimpleDateFormat from the java.text package 77.  Formatting date with full day and month name and show time up to milliseconds with AM/PM 78.  Getting the Current Time 79.  Output current time: %tc 80.  Swing: Date Time Editor 81.  Get day of week 82.  Convert milliseconds value to date 83.  Calculate the age 84.  Format a duration in ms into a string as "Days,Hours,minutes and seconds" 85.  Formatting Symbols for SimpleDateFormat 86.  Express a duration in term of HH:MM:SS 87.  Match Date 88.  Checks if two date objects are on the same day ignoring time 89.  Checks if two date objects represent the same instant in time 90.  Calendar Comparator 91.  Calendar To String 92.  Formatter that caches formatted date information 93.  Date Format Cache. 94.  Date and time formatting utilities and constants. 95.  Formatting dates into Strings. 96.  Monitored GregorianCalendar 97.  RFC date format 98.  Utilities for java.util.Date