How to Shuffle Deck of Cards in Java

Rashmi Patidar Feb 02, 2024 Java Java ArrayList Java Loop Java Array
  1. Shuffle the ArrayList Using the Traditional Loop in Java
  2. Shuffle the ArrayList Using the Collections shuffle Function in Java
How to Shuffle Deck of Cards in Java

The word shuffle literally means to arrange the elements, objects, or cards in random or undefined order. The objects list that does not follow a defined pattern is considered shuffled.

Similarly, in Java, various methods allow a user to shuffle elements. Below is the code block to demonstrate this process.

Shuffle the ArrayList Using the Traditional Loop in Java

import java.util.ArrayList;

public class Main {
  private static final int SIZE_OF_DECK = 52;

  public static void main(String[] args) {
    ArrayList<Integer> cardsDeck = new ArrayList<>();
    for (int i = 0; i < SIZE_OF_DECK; ++i) {
      cardsDeck.add(i);
    }
    System.out.println("Deck Of Cards:" + cardsDeck);
    ArrayList<Integer> shuffledDeck = new ArrayList<>();
    while (cardsDeck.size() > 0) {
      int index = (int) (Math.random() * cardsDeck.size());
      int removedCard = cardsDeck.remove(index);
      shuffledDeck.add(removedCard);
    }
    System.out.println("Shuffled Cards" + shuffledDeck);
  }
}