The remove(int index) method of List interface in Java is used to remove an element from the specified index from a List container and returns the element after removing it. It also shifts the elements after the removed element by 1 position to the left in the List.
Syntax:
E remove(int index) Where, E is the type of element maintained by this List collection
Parameters: It accepts a single parameter index of integer type which represents the index of the element needed to be removed from the List.
Return Value: It returns the element present at the given index after removing it.
Below program illustrate the remove(int index) method of List in Java:
Program 1:
// Program to illustrate the// remove(int index) method import java.util.*; public class GFG { public static void main(String[] args) { // Declare an empty List of size 5 List<Integer> list = new ArrayList<Integer>(5); // Add elements to the list list.add(5); list.add(10); list.add(15); list.add(20); list.add(25); // Index from which you want to remove element int index = 2; // Initial list System.out.println("Initial List: " + list); // remove element list.remove(index); // Final list System.out.println("Final List: " + list); }} |
Output:
Initial List: [5, 10, 15, 20, 25] Final List: [5, 10, 20, 25]
Program 2:
// Program to illustrate the// remove(int index) method import java.util.*; public class GFG { public static void main(String[] args) { // Declare an empty List of size 5 List<String> list = new ArrayList<String>(5); // Add elements to the list list.add("Welcome"); list.add("to"); list.add("Geeks"); list.add("for"); list.add("Geeks"); // Index from which you want // to remove element int index = 2; // Initial list System.out.println("Initial List: " + list); // remove element list.remove(index); // Final list System.out.println("Final List: " + list); }} |
Output:
Initial List: [Welcome, to, Geeks, for, Geeks] Final List: [Welcome, to, for, Geeks]
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/List.html#remove-int-
