In this example we shall show you how to check if an element exists in a LinkedList or not. To check an element existence in a LinkedList one should perform the following steps:
- Create a new LinkedList.
- Populate the list with elements, with
add(E e)API method of LinkedList. - Check if an element exists in the list, with
contains(Object o)API method of LinkedList. The method returns true if the list contains the specified element and false otherwise,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
import java.util.LinkedList;
public class ElementExistsLinkedList {
public static void main(String[] args) {
// Create a LinkedList and populate it with elements
LinkedList linkedList = new LinkedList();
linkedList.add("element_1");
linkedList.add("element_2");
linkedList.add("element_3");
linkedList.add("element_4");
linkedList.add("element_5");
// boolean contains(Object value) method returns true if the LinkedList contains the value, otherwise false.
boolean exists = linkedList.contains("element_2");
System.out.println("element_2 exists in LinkedList ? : " + exists);
}
}
Output:
element_2 exists in LinkedList ? : true
This was an example of how to check if an element exists in a LinkedList in Java.
