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

public class Shuffle
{
    public static void main(String[] args)
    {
        ArrayList<String> myList = new ArrayList<>();
        myList.add("aaa"); myList.add("bbb"); myList.add("ccc");
        myList.add("ddd"); myList.add("eee"); myList.add("fff");
 
        System.out.println( myList );   // Original order

        Collections.shuffle( myList );  // Shuffles a list

        System.out.println( myList );   // Show new order
    } 

}