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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. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. public static void main (String[] args) throws java.lang.Exception
  11. {
  12. long millis = ((new Date(2017, 11, 6).getTime()) - (new Date(2017, 11, 5).getTime())) ;
  13. System.out.println( "Elapsed" + millis );
  14.  
  15. System.out.println( "24 hours in millis: " + 24 * 60 * 60 * 1_000L ) ;
  16. }
  17. }
Success #stdin #stdout 0.1s 2841600KB
stdin
Standard input is empty
stdout
Elapsed86400000
24 hours in millis: 86400000