LINKED LIST

package test1;

import java.util.LinkedList;

public class TEST1
{
    public static void main(String[] args)
    {
        //create a linked list
        LinkedList<String> linkedList = new LinkedList<>();
        //delete / clear the whole linked list
        linkedList.clear();
        //add element to the linked list
        linkedList.add("1");
        linkedList.add("2");
        linkedList.add("3");
        linkedList.add("4");
        linkedList.add("5");
        linkedList.add("6");
        linkedList.add("7");
        linkedList.add("8");
        linkedList.add("9");
        linkedList.add("0");
        //addFist
        linkedList.addFirst("start");
        //addLast
        linkedList.addLast("end");
        //print a linked list
        System.out.println("THE CONTENTS OF LINKED LISTS ARE : "+linkedList);
        //remove any elements from the linked list
        linkedList.remove(3);
        //checkIt
        System.out.println("THE CONTENTS OF LINKED LISTS ARE : "+linkedList);
        //remove first elements from the linked list
        linkedList.removeFirst();
        //checkIt
        System.out.println("THE CONTENTS OF LINKED LISTS ARE : "+linkedList);
        //remove last elements from the linked list
        linkedList.removeLast();
        //checkIt
        System.out.println("THE CONTENTS OF LINKED LISTS ARE : "+linkedList);
        //check if a element is on linked list or not
        boolean check1 = linkedList.contains("4");
        //print it
        System.out.println(check1);
        //delete+get pop/pol operation
        String s1 = linkedList.poll();
        System.out.println(s1);
        System.out.println(linkedList);
        //not delete+get peek operation
        String s2 = linkedList.peekFirst();
        System.out.println(s2);
        //get a definite element of the linked list
        String s3 = linkedList.get(5);
        System.out.println(s3);
        //set or update a definite element of the linked list
        linkedList.set(4, "ok");
        System.out.println(linkedList);
    }
}