Question

List all the internal contents of a class in Java.​

Answer 1

Explanation:

List Interface in Java with Examples

The List interface provides a way to store the ordered collection. It is a child interface of Collection. It is an ordered collection of objects in which duplicate values can be stored. Since List preserves the insertion order, it allows positional access and insertion of elements.



Declaration: The List interface is declared as:

public abstract interface List extends Collection

Example of a List:

// Java program to demonstrate a List

  

import java.util.*;

  

public class ListDemo {

    public static void main(String[] args)

    {

        // Creating a list

        List<Integer> l1

            = new ArrayList<Integer>();

  

        // Adds 1 at 0 index

        l1.add(0, 1);

  

        // Adds 2 at 1 index

        l1.add(1, 2);

        System.out.println(l1);

  

        // Creating another list

        List<Integer> l2

            = new ArrayList<Integer>();

  

        l2.add(1);

        l2.add(