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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.temporal.*;
  9.  
  10. /* Name of the class has to be "Main" only if the class is public. */
  11. class Ideone
  12. {
  13. 	public static void main (String[] args) throws java.lang.Exception
  14. 	{
  15.  
  16.         List<String> inputs = new ArrayList<> ();
  17.         inputs.add ( "2016-01-23" );
  18.         inputs.add ( "2016-01-25" );
  19.         inputs.add ( "2016-02-22" ); // End of longest period between dates.
  20.         inputs.add ( "2016-02-25" );
  21.         inputs.add ( "2016-02-28" );
  22.  
  23.         LocalDate longestStart = null;
  24.         LocalDate longestStop = null;
  25.         LocalDate previousDate = null;
  26.         long longestInDays = 0;
  27.  
  28.         for ( String input : inputs ) {
  29.             LocalDate currentDate = LocalDate.parse ( input );
  30.             if ( null == previousDate ) {  // First loop.
  31.                 previousDate = currentDate;
  32.                 continue;  // Skip the rest of this first loop.
  33.             }
  34.             long currentDays = ChronoUnit.DAYS.between ( previousDate , currentDate );
  35.             if ( currentDays > longestInDays ) {
  36.                 // If the current loop exceeds previous longest, remember this one as longest.
  37.                 longestInDays = currentDays;
  38.                 longestStart = previousDate;
  39.                 longestStop = currentDate;
  40.             }
  41.             // Prepare for next loop.
  42.             previousDate = currentDate;
  43.         }
  44.  
  45.         System.out.println ( "Longest period has days: " + longestInDays + " = " + longestStart + "/" + longestStop );
  46.  
  47. 	}
  48. }
Success #stdin #stdout 0.1s 711680KB
comments (?)
stdin 
Standard input is empty
stdout 
Longest period has days: 28 = 2016-01-25/2016-02-22
https://ideone.com/RcaE4Q
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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