What is the Vector.elementAt method in Java?
The elementAt method of the Vector class is used to get the element at a specific index of the vector object.
The
Vectorclass is a growable array of objects. The elements ofVectorcan be accessed using an integer index and the size of aVectorcan be increased or decreased. Read more aboutVectorhere.
Syntax
public E elementAt(int index)
Argument
The index is the index of a vector from which the element is to be fetched. The index should be positive and less than the size of the vector object. Otherwise, ArrayIndexOutOfBoundsException will be thrown.
This means:
index >= 0 && index < size()
Return value
This method returns the element present at the passed index.
Working example
Please click the “Run” button below to see how the
elementAtmethod works.
import java.util.Vector;class RemoveAll {public static void main( String args[] ) {// Creating VectorVector<Integer> vector = new Vector<>();// add elememtsvector.add(1);vector.add(2);vector.add(3);System.out.println("The Vector is: " + vector);// Print first elementSystem.out.println("Element at index 0 : " + vector.elementAt(0));System.out.println("Element at index 1 : " + vector.elementAt(1));System.out.println("Element at index 2 : " + vector.elementAt(2));}}
Explanation
In the code above,
-
Line 5: We created a vector object.
-
Lines 8 - 10: We added three elements (
1,2,3) to the above created vector object. -
Lines 15 - 17: We used the
elementAtmethod of thevectorobject to get the element present at index 0, 1, and 2.
