The add() method of CopyOnWriteArrayList in Java

Two types of add() methods are available in the CopyOnWriteArrayList class: add(E e) method

To add elements in CopyOnWriteArrayList class in Java, use the add() method. Here, the element is appended to the end of the list.

The syntax is as follows

boolean add(E e)

Here, the parameter e is the element to be appended to this list.

To work with CopyOnWriteArrayList class, you need to import the following package

import java.util.concurrent.CopyOnWriteArrayList;

The following is an example to add elements in the CopyOnWriteArrayList class in Java

Example

 Live Demo

import java.util.concurrent.CopyOnWriteArrayList;
public class Demo {
   public static void main(String[] args) {
      CopyOnWriteArrayList<Integer> arrList = new CopyOnWriteArrayList<Integer>();
      arrList.add(100);
      arrList.add(250);
      arrList.add(400);
      arrList.add(500);
      arrList.add(650);
      arrList.add(700);
      arrList.add(800);
      System.out.println("CopyOnWriteArrayList Elements = " + arrList);
   }
}

Output

CopyOnWriteArrayList Elements = [100, 250, 400, 500, 650, 700, 800]

add(int index, E element) method

Using this method, insert the specified element at the specified position in the CopyOnWriteArrayList.

The syntax is as follows

void add(int index, E ele)

Here, the parameter index is where you want to insert the element and ele is the element to be inserted to this list.

To work with CopyOnWriteArrayList class, you need to import the following package

import java.util.concurrent.CopyOnWriteArrayList;

The following is an example to add elements in the CopyOnWriteArrayList class in Java

Example

 Live Demo

import java.util.concurrent.CopyOnWriteArrayList;
public class Demo {
   public static void main(String[] args) {
      CopyOnWriteArrayList<Integer> arrList = new CopyOnWriteArrayList<Integer>();
      arrList.add(100);
      arrList.add(250);
      arrList.add(0, 400);
      arrList.add(1, 500);
      arrList.add(2, 650);
      arrList.add(700);
      arrList.add(800);
      System.out.println("CopyOnWriteArrayList Elements = " + arrList);
   }
}

Output

CopyOnWriteArrayList Elements = [400, 500, 650, 100, 250, 700, 800]