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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.*;
  8. import java.time.format.*;
  9. import java.time.temporal.*;
  10. import java.time.zone.*;
  11. import java.util.concurrent.*;
  12.  
  13.  
  14. /* Name of the class has to be "Main" only if the class is public. */
  15. class Ideone
  16. {
  17. 	public static void main (String[] args) throws java.lang.Exception
  18. 	{
  19.  
  20.         List<CharSequence> inputs = new ArrayList<> ( 4 );
  21.  
  22.         inputs.add ( "Mon Jul 28 11:39:29 GMT-05:00 2014" );
  23.         inputs.add ( "Mon Jul 28 13:39:29 GMT+02:00 2014" );
  24.         inputs.add ( "Thu Jul 17 00:02:02 UTC 2014" );
  25.         inputs.add ( "Fri Jul 18 14:47:01 UTC 2014" );
  26.         inputs.add ( "garbage-in garbaage-out" );
  27.         inputs.add ( "Fri Jan 23 12:34:56 UTC 2099" );  // Future.
  28.  
  29.         Instant now = Instant.now ();  // Capture the current moment in UTC.
  30.  
  31.         DateTimeFormatter fGMT = DateTimeFormatter.ofPattern ( "EEE MMM dd HH:mm:ss OOOO uuuu" );
  32.         DateTimeFormatter fUTC = DateTimeFormatter.ofPattern ( "EEE MMM dd HH:mm:ss z uuuu" );
  33.  
  34.         for ( CharSequence input : inputs ) {
  35.             if ( input.length () == "Mon Jul 28 11:39:29 GMT-05:00 2014".length () ) {
  36.                 OffsetDateTime odt = OffsetDateTime.parse ( input , fGMT );
  37.                 if ( odt.toInstant ().isAfter ( now ) ) {
  38.                     System.out.println ( "input: " + input + " is future." );
  39.                 } else {
  40.                     System.out.println ( "input: " + input + " is past or present." );
  41.                 }
  42.             } else if ( input.length () == "Thu Jul 17 00:02:02 UTC 2014".length () ) {
  43.                 ZonedDateTime zdt = ZonedDateTime.parse ( input , fUTC );
  44.                 if ( zdt.toInstant ().isAfter ( now ) ) {
  45.                     System.out.println ( "input: " + input + " is future." );
  46.                 } else {
  47.                     System.out.println ( "input: " + input + " is past or present." );
  48.                 }
  49.             } else {
  50.                 System.out.println ( "ERROR - Unexpected input: " + input );
  51.             }
  52.         }
  53.  
  54. 	}
  55. }
Success #stdin #stdout 0.15s 4386816KB
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Standard input is empty
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input: Mon Jul 28 11:39:29 GMT-05:00 2014 is past or present.
input: Mon Jul 28 13:39:29 GMT+02:00 2014 is past or present.
input: Thu Jul 17 00:02:02 UTC 2014 is past or present.
input: Fri Jul 18 14:47:01 UTC 2014 is past or present.
ERROR - Unexpected input: garbage-in garbaage-out
input: Fri Jan 23 12:34:56 UTC 2099 is future.
https://ideone.com/0KA4pS
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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