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  1. import java.util.Random;
  2. /**
  3.  * Shuffle Deck of Cards
  4.  * @author r.prateek
  5.  */
  6. class ShuffleDeck {
  7. 	private int[] arr;
  8.  
  9. 	public ShuffleDeck(int[] input) {
  10. 		this.arr=input;
  11. 	}
  12.  
  13. 	/**
  14. 	 * Shuffle subroutine
  15. 	 */
  16. 	public void shuffle(){
  17. 		 Random randomGenerator = new Random();
  18. 		for(int i=0;i<arr.length;i++){
  19. 			int rand =randomGenerator.nextInt(i+1);
  20. 			swap(i,rand);
  21. 		}
  22. 		System.out.print("After Shuffling:  ");
  23. 		print();
  24. 	}
  25.  
  26. 	private void swap(int i,int j){
  27. 		int temp = arr[i];
  28. 		arr[i]=arr[j];
  29. 		arr[j]=temp;
  30. 	}
  31. 	/**
  32. 	 * Print Cards
  33. 	 */
  34. 	public void print(){
  35. 		for(Integer i:arr)
  36. 			System.out.print(i + "\t");
  37. 	}
  38.  
  39. 	public static void main(String[] args) {
  40. 		int[] input = {1,2,3,4,5,6,7,8,9,10};
  41.  
  42. 		ShuffleDeck shuffle= new ShuffleDeck(input);
  43. 		System.out.print("Before Shuffling: ");
  44. 		shuffle.print();
  45. 		System.out.println();
  46. 		shuffle.shuffle();
  47. 	}
  48. }
  49.  
Success #stdin #stdout 0.07s 380224KB
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stdin
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Standard input is empty
stdout
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Before Shuffling: 1	2	3	4	5	6	7	8	9	10	
After Shuffling:  7	4	2	1	6	9	5	10	3	8
https://ideone.com/ATiVVA
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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