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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.  
  11. /* Name of the class has to be "Main" only if the class is public. */
  12. class Ideone
  13. {
  14. 	public static void main (String[] args) throws java.lang.Exception
  15. 	{
  16.  
  17. List< DateTimeFormatter > formatters = 
  18.     List.of(
  19.         DateTimeFormatter.ofPattern( "MM-dd-uuuu" ) ,  // 01-23-2019
  20.         DateTimeFormatter.ISO_LOCAL_DATE ,             // 2019-01-23
  21.         DateTimeFormatter.ofPattern( "uuuu/MM/dd" )    // 2019/01/23
  22.     )
  23. ;
  24.  
  25. List< String > inputs = 
  26.     List.of(
  27.     	"01-23-2019" , 
  28.     	"2019-01-23" ,
  29.     	"2019/01/23" ,
  30.     	"banana"
  31.     )
  32. ;
  33.  
  34. for( String input : inputs ) {
  35. 	LocalDate localDate = null ;
  36. 	for( DateTimeFormatter formatter : formatters ) 
  37. 	{
  38.         try{
  39.             localDate = LocalDate.parse( input , formatter ) ;
  40.         } catch ( DateTimeParseException e ) {
  41.             // Ignoring exception, as it is expected. 
  42.         }
  43. 	}
  44. 	if( Objects.isNull( localDate ) ) 
  45. 	{ // Deal with unexpected input 
  46. 		System.out.println( "ERROR: Unexpected input: " + input ) ;
  47. 	} else {
  48. 		System.out.println( "Input: " + input + " ➙ " + localDate.toString() ) ;
  49. 	}
  50. }
  51.  
  52.  
  53.  
  54. 	}
  55. }
Success #stdin #stdout 0.13s 37844KB
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stdin
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Standard input is empty
stdout
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Input: 01-23-2019 ➙ 2019-01-23
Input: 2019-01-23 ➙ 2019-01-23
Input: 2019/01/23 ➙ 2019-01-23
ERROR: Unexpected input: banana
https://ideone.com/nys8jg
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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