Shuffle elements of ArrayList with Java Collections

Java 8Object Oriented ProgrammingProgramming

In order to shuffle elements of ArrayList with Java Collections, we use the Collections.shuffle() method. The java.util.Collections.shuffle() method randomly permutes the list using a default source of randomness.

Declaration −The java.util.Collections.shuffle() method is declared as follows −

public static void shuffle(List <?> list)

Let us see a program to shuffle elements of ArrayList with Java Collections −

Example

 Live Demo

import java.util.*;
public class Example {
   public static void main (String[] args) {
      ArrayList<Integer> list = new ArrayList<Integer>();
      list.add(1);
      list.add(2);
      list.add(7);
      list.add(8);
      list.add(3);
      list.add(9);
      System.out.println("Original list : " + list);
      Collections.shuffle(list); // shuffling the list
      System.out.println("Shuffled list : " + list);
   }
}

Output

Original list : [1, 2, 7, 8, 3, 9]
Shuffled list : [3, 8, 7, 9, 1, 2]
raja
Published on 08-Jan-2019 17:52:02
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