Java – Check if a particular element exists in LinkedList example

In this example we are gonna see how to check if a particular element exists in LinkedList using contains() method:

public boolean contains(Object o): Returns true if this list contains the specified element. More formally, returns true if and only if this list contains at least one element e such that (o==null ? e==null : o.equals(e)).

import java.util.LinkedList;

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

    // Creating LinkedList of String Elements
    LinkedList<String> linkedlist = new LinkedList<String>();
 
    // Populating it with String values
    linkedlist.add("AA");
    linkedlist.add("BB");
    linkedlist.add("CC");
    linkedlist.add("DD");
    linkedlist.add("EE");

    // contains() method checks whether the element exists
    if (linkedlist.contains("CC")) {
       System.out.println("Element CC is present in List");
    } else {
       System.out.println("List doesn't have element CC");
     }
    
    //Checking for element FF
    if (linkedlist.contains("FF")) {
       System.out.println("Element FF is present in List");
    } else {
        System.out.println("List doesn't have element FF");
      }
 }
}

Output:

Element CC is present in List
List doesn't have element FF