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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7.     import java.time.Duration;
  8.     import java.time.LocalDateTime;
  9.     import java.time.LocalTime;
  10.     import java.time.ZoneId;
  11.     import java.time.ZoneOffset;
  12.     import java.time.ZonedDateTime;
  13.     import java.time.format.DateTimeFormatter;
  14.     import java.time.format.DateTimeParseException;
  15.     import java.util.Locale;
  16.  
  17. /* Name of the class has to be "Main" only if the class is public. */
  18. class Ideone
  19. {
  20. 	public static void main (String[] args) throws java.lang.Exception
  21. 	{
  22.  
  23.             // Run with out time zone (assumes UTC).
  24.             Duration dShort = DurationProcessor.process ( "2008-01-01 01:00 pm - 01:56 pm" );
  25.             System.out.println ( "dShort: " + dShort );
  26.  
  27.             Duration dLong = DurationProcessor.process ( "2008-01-01 08:30 pm - 2008-01-02 09:30 am" );
  28.             System.out.println ( "dLong: " + dLong );
  29.  
  30.             // Run with specified time zone.
  31.             ZoneId z = ZoneId.of ( "America/Montreal" );
  32.             Duration dShortZoned = DurationProcessor.process ( "2008-01-01 01:00 pm - 01:56 pm" , z );
  33.             System.out.println ( "dShortZoned: " + dShortZoned );
  34.  
  35.             Duration dLongZoned = DurationProcessor.process ( "2008-01-01 08:30 pm - 2008-01-02 09:30 am" , z );
  36.             System.out.println ( "dLongZoned: " + dLongZoned );
  37.  
  38. 	}
  39. }
  40.  
  41.  
  42.  
  43.     /**
  44.      *
  45.      * @author Basil Bourque
  46.      */
  47.     class DurationProcessor {
  48.  
  49.         static final int SHORT = 30;
  50.         static final int LONG = 41;
  51.  
  52.         static final DateTimeFormatter FORMATTER_LOCALDATETIME = DateTimeFormatter.ofPattern ( "uuuu-MM-dd hh:mm a" );
  53.         static final DateTimeFormatter FORMATTER_LOCALTIME = DateTimeFormatter.ofPattern ( "hh:mm a" );
  54.  
  55.         static public Duration process ( String input ) {
  56.             return DurationProcessor.process ( input , ZoneOffset.UTC );
  57.         }
  58.  
  59.         static public Duration process ( String input , ZoneId zoneId ) {
  60.             Duration d = Duration.ZERO;  // Or maybe null. To be generated by the bottom of this code.
  61.  
  62.             if ( null == input ) {
  63.                 // …
  64.                 System.out.println ( "ERROR - Passed null argument." );
  65.                 return d;
  66.             }
  67.             if ( input.length () == 0 ) {
  68.                 // …
  69.                 System.out.println ( "ERROR - Passed empty string as argument." );
  70.                 return d;
  71.             }
  72.  
  73.             String inputModified = input.toUpperCase ( Locale.ENGLISH ); // Change `am` `pm` to `AM` `PM` for parsing.
  74.  
  75.             String[] parts = inputModified.split ( " - " );
  76.             String inputStart = parts[ 0 ]; // A date-time sting.
  77.             String inputStop = parts[ 1 ]; // Either a date-time string or a time-only string (assume the same date).
  78.  
  79.             ZonedDateTime start = null;  // To be generated in this block of code.
  80.             try {
  81.                 LocalDateTime ldt = LocalDateTime.parse ( inputStart , DurationProcessor.FORMATTER_LOCALDATETIME );
  82.                 start = ldt.atZone ( zoneId );
  83.             } catch ( DateTimeParseException e ) {
  84.                 // …
  85.                 System.out.println ( "ERROR - The start failed to parse. inputStart: " + inputStart );
  86.                 return d;
  87.             }
  88.  
  89.             ZonedDateTime stop = null; // To be generated in this block of code.
  90.             switch ( input.length () ) {
  91.                 case DurationProcessor.SHORT:  // Example: "2008-01-01 01:00 pm - 01:56 pm"
  92.                     try {
  93.                         LocalTime stopTime = LocalTime.parse ( inputStop , DurationProcessor.FORMATTER_LOCALTIME );
  94.                         stop = ZonedDateTime.of ( start.toLocalDate () , stopTime , zoneId );
  95.                     } catch ( DateTimeParseException e ) {
  96.                         // …
  97.                         System.out.println ( "ERROR - The stop time failed to parse." );
  98.                         return d;
  99.                     }
  100.                     break;
  101.                 case DurationProcessor.LONG:  // "2008-01-01 8:30 pm - 2008-01-02 09:30 am"
  102.                     try {
  103.                         LocalDateTime ldt = LocalDateTime.parse ( inputStop , DurationProcessor.FORMATTER_LOCALDATETIME );
  104.                         stop = ldt.atZone ( zoneId );
  105.                     } catch ( DateTimeParseException e ) {
  106.                         // …
  107.                         System.out.println ( "ERROR - The stop date-time failed to parse." );
  108.                         return d;
  109.                     }
  110.                     break;
  111.                 default:
  112.                     // …
  113.                     System.out.println ( "ERROR - Input string is of unexpected length: " + input.length () );
  114.                     break;
  115.             }
  116.  
  117.             d = Duration.between ( start , stop );
  118.             return d;
  119.         }
  120.  
  121.         public static void main ( String[] args ) {
  122.             // Run with out time zone (assumes UTC).
  123.             Duration dShort = DurationProcessor.process ( "2008-01-01 01:00 pm - 01:56 pm" );
  124.             System.out.println ( "dShort: " + dShort );
  125.  
  126.             Duration dLong = DurationProcessor.process ( "2008-01-01 08:30 pm - 2008-01-02 09:30 am" );
  127.             System.out.println ( "dLong: " + dLong );
  128.  
  129.             // Run with specified time zone.
  130.             ZoneId z = ZoneId.of ( "America/Montreal" );
  131.             Duration dShortZoned = DurationProcessor.process ( "2008-01-01 01:00 pm - 01:56 pm" , z );
  132.             System.out.println ( "dShortZoned: " + dShortZoned );
  133.  
  134.             Duration dLongZoned = DurationProcessor.process ( "2008-01-01 08:30 pm - 2008-01-02 09:30 am" , z );
  135.             System.out.println ( "dLongZoned: " + dLongZoned );
  136.  
  137.         }
  138.     }
Success #stdin #stdout 0.13s 712192KB
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stdin
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Standard input is empty
stdout
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dShort: PT56M
dLong: PT13H
dShortZoned: PT56M
dLongZoned: PT13H
https://ideone.com/qrsaZi
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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