Java.util.ArrayList.add() Method

Description

The java.util.ArrayList.add(int index, E elemen) method inserts the specified element E at the specified position in this list.It shifts the element currently at that position (if any) and any subsequent elements to the right (will add one to their indices).

Declaration

Following is the declaration for java.util.ArrayList.add() method

public void add(int index, E element)

Parameters

• index − The index at which the specified element is to be inserted.

• element − The element to be inserted.

Return Value

This method does not return any value.

Exception

IndexOutOfBoundsException − if the index is out of range.

Example

The following example shows the usage of java.util.ArrayList.add(index,E) method.

package com.tutorialspoint;

import java.util.ArrayList;

public class ArrayListDemo {
   public static void main(String[] args) {

      // create an empty array list with an initial capacity
      ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

      // use add() method to add elements in the list
      arrlist.add(15);
      arrlist.add(22);
      arrlist.add(30);
      arrlist.add(40);

      // adding element 25 at third position
      arrlist.add(2,25);
        
      // let us print all the elements available in list
      for (Integer number : arrlist) {
         System.out.println("Number = " + number);
      }  
   }
}   

Let us compile and run the above program, this will produce the following result −

Number = 15
Number = 22
Number = 25
Number = 30
Number = 40