Shuffling Using shuffle() method.

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

class Main {
public static void main(String[] args) {

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

    
    numbers.add(1);
    numbers.add(2);
    numbers.add(3);
    System.out.println("Sorted ArrayList: " + numbers);

    
    Collections.shuffle(numbers);
    System.out.println("ArrayList using shuffle: " + numbers);

}

}