Android™ How to Program, Second Edition

J.6.2. Method shuffle

Method shuffle randomly orders a List’s elements. Appendix E presented a card shuffling and dealing simulation that shuffled a deck of cards with a loop. If you have an array of 52 Card objects, you can shuffle them with method shuffle as follows:

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List< Card > list = Arrays.asList( deck ); // get ListCollections.shuffle( list ); // shuffle deck

The second line above shuffles the array by calling static method shuffle of class Collections. Method shuffle requires a List argument, so we must obtain a List view of the array before we can shuffle it. The Arrays class’s static method asList gets a List view of the deck array.