fork download
copy 
  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 START_EPOCH = -12219292800000L;
  13. 		long nanosSince = (System.currentTimeMillis() - START_EPOCH) * 10000;
  14.  
  15. 		long msb = 0L;
  16.         msb |= (0x00000000ffffffffL & nanosSince) << 32;
  17.         msb |= (0x0000ffff00000000L & nanosSince) >>> 16;
  18.         msb |= (0xffff000000000000L & nanosSince) >>> 48;
  19.         msb |= 0x0000000000001000L;
  20.  
  21.         byte[] uuidBytes = new byte[16];
  22.  
  23. 		System.out.printf("%x\n", msb);
  24.  
  25.         for (int i = 0; i < 8; i++)
  26.         {
  27.             uuidBytes[i] = (byte) (msb >>> 8 * (7 - i));
  28. 			//System.out.printf("%x\n", uuidBytes[i]);
  29.         }
  30.         for (int i = 8; i < 16; i++)
  31.         {
  32.             uuidBytes[i] = (byte) (msb >>> 8 * (7 - i));
  33.             //System.out.printf("%x\n", uuidBytes[i]);
  34.         }
  35.         long clock = new Random(System.currentTimeMillis()).nextLong();
  36.         System.out.printf("%d\n", clock);
  37. 		// your code goes here
  38. 	}
  39. }
Success #stdin #stdout 0.07s 380224KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
1fc4e9302f3811e4
4214499448420155079
https://ideone.com/HFv8Me
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!