Arraylist remove element – Java Program to Remove Element at Particular Index of ArrayList

Arraylist remove element: In this article, we will learn how to remove an element of an ArrayList from a specified Index by using Java programming language.

Java Program to Remove Element at Particular Index of ArrayList

This can be done by using a simple built-in method remove().

Syntax:

public Object remove(int index)

Parameters:

1. Particular Index from which element to be removed.

Let’s see the program to remove element at particular index of ArrayList.

• By Using remove() Method

Method-1: Java Program to Remove Element at Particular Index of ArrayList By Using remove() Method

Approach:

1. Create an ArrayList say al and add elements into it using add() method.
2. Use the remove(int index) method defined above for different test cases (indexes) as given in the below code.
3. Display the updated ArrayList.

Program:

import java.util.ArrayList;
public class Main 
{
   public static void main(String args[]) 
   {

       //String ArrayList
       ArrayList<String> al = new ArrayList<String>();
       al.add("P");
       al.add("Q");
       al.add("R");
       al.add("X");
       al.add("S");
       al.add("T");

       // Displaying before removing element
       System.out.println("ArrayList before removal :");

       for(String ele: al)
       {
            System.out.println(ele);
       }
       //Removing P (Index - 0)
       al.remove(0);
       //Removing X (Index - 2) from the remaining list
       al.remove(2);

        // Displaying Remaining elements of ArrayList
       System.out.println("ArrayList After remove:");
       for(String ele: al)
       {
             System.out.println(ele);
       }
    }
}

Output:

ArrayList before removal :
P
Q
R
X
S
T
ArrayList After remove:
Q
R
S
T

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