Shuffle Deck of Cards

Problem Statement: 
   Shuffle Deck of Cards

Solution:
   
Knuth Shuffle :
   In Iteration i, pick Integer 'rand' between 0 and i uniformly at random, swap arr[i] and arr[rand]

Knuth Shuffling algorithm produces a uniformly random permutation of the input array in linear time.
Key Note: Shuffling element should be between 0 to i  or between i to N-1 for uniformly random result.

Source Code : LINK

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/** * Shuffle subroutine */ public void shuffle(){ Random randomGenerator = new Random(); for(int i=0;i<arr.length;i++){ int rand =randomGenerator.nextInt(i+1); swap(i,rand); } System.out.print("After Shuffling: "); print(); }

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Happy Coding !! :)