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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. 		int diff = 0;
  13. 		for (long seed = 0 ; seed != 1000 ; seed++) {
  14. 			Random rndOne = new Random(seed);
  15. 			List<Integer> one = make();
  16. 			Collections.shuffle(one, rndOne);
  17. 			Random rndTwo = new Random(seed);
  18. 			List<Integer> two = make();
  19. 			Collections.shuffle(two, rndTwo);
  20. 			boolean same = true;
  21. 			for (int i = 0 ; i != 52 ; i++) {
  22. 				if (one.get(i).equals(two.get(i))) {
  23. 					continue;
  24. 				}
  25. 				same = false;
  26. 				break;
  27. 			}
  28. 			if (!same) {
  29. 				diff++;
  30. 				System.out.println("Different when seed="+seed);
  31. 			}
  32. 		}
  33. 		System.out.println("Number of differences: "+diff);
  34. 	}
  35. 	public static List<Integer> make() {
  36. 	    List<Integer> items = new ArrayList<>();
  37. 		for (int i = 0 ; i != 52 ; i++) {
  38. 			items.add(i);
  39. 		}
  40.         return items;
  41. 	}
  42. }
Success #stdin #stdout 0.13s 30700KB
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Number of differences: 0
https://ideone.com/YgzHxD
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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