LinkedList contains() Method in Java

LinkedList contains() Method in Java

Last Updated : 16 Dec, 2024

In Java, the contains() method of LinkedList 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 of Java LinkedList contains() Method

boolean contains(Object element);

Parameter: 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.

Example: Here, we use the contains() method to check if the element is present in the LinkedList or not.

Java

// Java programm to Demonstrate the 
// use of contains() in LinkedList
import java.util.LinkedList;

public class Geeks {
    public static void main(String args[]) {
        LinkedList<String> l = new LinkedList<>();

        // Use add() method to 
        // add elements in the list
        l.add("Geeks");
        l.add("for");
        l.add("Geeks");
        l.add("10");
        l.add("20");

        System.out.println("LinkedList: " + l);

        // Check if the list contains "20"
        System.out.println("\nThe List contains '20': "
                           + l.contains("20"));

        // Check if the list contains "Hello"
        System.out.println(
            "The List contains 'Hello': "
            + l.contains("Hello"));

        // Check if the list contains "Geeks"
        System.out.println(
            "The List contains 'Geeks': "
            + l.contains("Geeks"));
    }
}

Output

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

The List contains '20': true
The List contains 'Hello': false
The List contains 'Geeks': true

LinkedList contains() Method in Java

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