Java Examples - Collection Shuffle


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Problem Description:

How to shuffle the elements of a collection ?

Solution:

Following example how to shuffle the elements of a collection with the help of Collections.shuffle() method of Collections class.

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Main {

   public static void main(String[] argv) throws Exception {
      ArrayList<String> obj = new ArrayList<String>();
      obj.add("A");
      obj.add("E");
      obj.add("I");
      obj.add("O");
      obj.add("U");
      
      Collections.shuffle(obj);
      System.out.println(obj);
   }   
}

Result:

The above code sample will produce the following result.

[I, U, A, O, E]

java_collections.htm

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