Vector removeElementAt() Method in Java

Last Updated : 24 May, 2023

The java.util.vector.removeElementAt(int index) method is used to remove an element from a Vector from a specific position or index. In this process the size of the vector is automatically reduced by one and all other elements after the removed element are shifted downwards by one position.

Syntax:

Vector.removeElementAt(int index)

Parameters: This method accepts a mandatory parameter index of integer data type which specifies the position of the element to be removed from the Vector.

Return Value: This method has void return type. It means it does not return anything.

Below program illustrate the Java.util.Vector.remove(int index) method:

Java

// Java code to illustrate removeElementAt() import java.util.*;  public class VectorDemo {     public static void main(String args[])     {          // Creating an empty Vector         Vector<String> vec_tor = new Vector<String>();          // Use add() method to add elements in the Vector         vec_tor.add("Geeks");         vec_tor.add("for");         vec_tor.add("Geeks");         vec_tor.add("10");         vec_tor.add("20");          // Output the Vector         System.out.println("Vector: " + vec_tor);          // Initial size         System.out.println("The initial size is: " + vec_tor.size());          // Remove the element at 3rd position         vec_tor.removeElementAt(2);                  // Print the final Vector         System.out.println("Final Vector: " + vec_tor);          // Final size         System.out.println("The final size is: " + vec_tor.size());     } }

Output:

Vector: [Geeks, for, Geeks, 10, 20] The initial size is: 5 Final Vector: [Geeks, for, 10, 20] The final size is: 4

Time complexity: O(n). // n is the size of the vector.
Auxiliary Space: O(1).

Vector removeElementAt() Method in Java

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