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LinkedList contains() Method in Java

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  • Last Updated : 27 Sep, 2021

The Java.util.LinkedList.contains() method is used to check whether an element is present in a LinkedList or not. It takes the element as a parameter and returns True if the element is present in the list.

Syntax: 

LinkedList.contains(Object element)

Parameters: The parameter element is of type LinkedList. This parameter refers to the element whose occurrence is needed to be checked in the list.

Return Value: The method returns True if the element is present in the LinkedList otherwise it returns False.

Below program illustrate the Java.util.LinkedList.contains() method:  

Java




// Java code to illustrate boolean contains()
import java.io.*;
import java.util.LinkedList;
 
public class LinkedListDemo {
   public static void main(String args[]) {
 
      // Creating an empty LinkedList
      LinkedList<String> list = new LinkedList<String>();
 
      // Use add() method to add elements in the list
      list.add("Geeks");
      list.add("for");
      list.add("Geeks");
      list.add("10");
      list.add("20");
 
      // Output the list
      System.out.println("LinkedList:" + list);
 
      // Check if the list contains "Hello"
      System.out.println("\nDoes the List contains 'Hello': "
                                      + list.contains("Hello"));
 
      // Check if the list contains "20"
      System.out.println("Does the List contains '20': "
                                         + list.contains("20"));
       
      // Check if the list contains "Geeks"
      System.out.println("Does the List contains 'Geeks': "
                                      + list.contains("Geeks"));
 
   }
}

Output: 

LinkedList:[Geeks, for, Geeks, 10, 20]

Does the List contains 'Hello': false
Does the List contains '20': true
Does the List contains 'Geeks': true

 

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