Can Two Variables Refer to the Same ArrayList in Java?

// Java program to show how two objects can
// refer to same ArrayList in Java

import java.util.ArrayList;

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

        // Creating an ArrayList of Integer type in Java
        ArrayList<Integer> list = new ArrayList<>();

        // Creating a new ArrayList object and making it
        // refer to the first ArrayList(list)
        ArrayList<Integer> secondList = list;

        // Inserting some Integer values to the
        // arrayList using list variable/object
        list.add(17);
        list.add(10);
        list.add(1);
        list.add(33);
        list.add(2);

        // ArrayList after insertions : [17, 10, 1, 33, 2]

        // Displaying the ArrayList
        System.out.print("ArrayList after insertions: ");
        display(list);

        // Modifying the ArrayList using secondList

        // Removing element from index 0
        secondList.remove(0);

        // Inserting Integer variables
        secondList.add(51);
        secondList.add(99);

        // ArrayList after modifications using
        // secondList: [10, 1, 33, 2, 51, 99]

        // Displaying the ArrayList
        System.out.print(
            "ArrayList after modifications using secondList: ");
        display(list);
    }

    // Function to display an ArrayList
    public static void display(ArrayList<Integer> list)
    {
        for (int i = 0; i < list.size(); i++) {
            System.out.print(list.get(i) + " ");
        }
        System.out.println();
    }
}