package Devmanuals.com;

import java.util.List;
import java.util.ArrayList;
import java.util.LinkedList;
public class ListRetainAll
{
    public static void main(String[] args)
    {
        // Create two collections:
        ArrayList al =  new ArrayList();
        LinkedList ll =  new LinkedList();
        ll.add("1");
        ll.add("2");
        ll.add("3");
        ll.add("4");
        
        System.out.println("The LinkedList collection before: " + ll);
        System.out.println("Size of LinkedList : "+ll.size());
        
        al.add("1");
        al.add("2");
        al.add("3");
        al.add("4");
        al.add("5");
        al.add("6");
        
        System.out.println("The ArrayList collection before : " + al);
        System.out.println("Size of ArrayList : "+al.size());
        // Delete the elements of ArrayList that are not in LinkedList:
        boolean b=al.retainAll(ll);
        //If list get changed return true otherwise false
        System.out.println("List becomes change : "+b);
        // Display the collection after:
        System.out.println("The ArrayList collection after : " + al);
        System.out.println("Size of ArrayList remains : "+al.size());
        System.out.println("The LinkedList collection after: " + ll);
        System.out.println("Size of LinkedList : "+ll.size());
        
    }
}