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

/*
 Method: 

 public static void shuffle(List<?> list)

 Parameters:

 list - the list to be shuffled.

 */

public class CollectionsExample
{

    public static void main(String[] args)
    {

        ArrayList<Integer> arrayList = new ArrayList<Integer>();

        arrayList.add(1000);
        arrayList.add(2000);
        arrayList.add(3000);
        arrayList.add(4000);
        arrayList.add(5000);

        System.out.println("Before shuffle , arrayList : " + arrayList + "\n");

        /*
         * Randomly permutes the specified list using a default source of
         * randomness.
         */
        Collections.shuffle(arrayList);

        System.out.println("After shuffle , arrayList : " + arrayList + "\n");

    }

}