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About Byron Kiourtzoglou

Byron Kiourtzoglou
Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.

Remove all elements from LinkedList example

With this example we are going to demonstrate how to remove all elements from a LinkedList in Java. In short, to remove all elements from a LinkedList, that means clearing the list you should:

  • Create a new LinkedList.
  • Populate the list with elements, with the add(E e) API method of the LinkedLink.
  • Invoke the clear() API method of the LinkedList. It removes all the elements from the specific list. You can check the size of the list before and after clearing it, with the size() API method of the LinkedList

Let’s take a look at the code snippet that follows:
 

package com.javacodegeeks.snippets.core;

import java.util.LinkedList;
import java.util.ListIterator;
 
public class LinkedListClear {
 
  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");
 
    System.out.println("LinkedList size before removing elements : " + linkedList.size());

    // LinkedList clear() operation removes all elements
    linkedList.clear();

    System.out.println("LinkedList size after removing elements : " + linkedList.size());
  }
}

Output:

LinkedList size before removing elements : 5
LinkedList size after removing elements : 0

 
This was an example of how to remove all elements from a LinkedList in Java.

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