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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. import java.time.*;
  7. import java.text.*;
  8.  
  9. class Ideone
  10. {
  11.     public static void main(String[] args) throws ParseException{
  12.  
  13. 	SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd");
  14.  
  15. 	Date date0 = sdf.parse("1970.01.02");
  16. 	long hours = date0.getTime() / 1000 / 3600;
  17. 	System.out.println( "number of hours since 01.01.1970  :  " + hours );
  18.  
  19. 	Date date1, date2;
  20. 	date1 = sdf.parse("2017.09.01");
  21. 	date2 = sdf.parse("2017.11.28");
  22.  
  23. 	long secs = (date2.getTime() - date1.getTime()) / 1000;
  24. 	long min = (date2.getTime() - date1.getTime() ) / 1000 / 60;
  25. 	long h = (date2.getTime() - date1.getTime() ) / 1000 / 3600;
  26. 	long days = (date2.getTime() - date1.getTime() ) / 1000 / 3600 / 24;
  27.  
  28. 	System.out.println( "number of seconds :  " + secs );
  29. 	System.out.println( "number of days :  " + days );
  30.     }	    
  31.  
  32. }
  33.  
  34.  
Success #stdin #stdout 0.13s 30048KB
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stdin
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Standard input is empty
stdout
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number of hours since 01.01.1970  :  24
number of seconds :  7603200
number of days :  88
https://ideone.com/4nsUz0
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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