How to swap elements of vector

import java.util.Collections;
import java.util.Vector;

public class SwapElement {

public static void main(String[] args) {

Vector<String> vector = new Vector<String>();
//add element in vector
vector.add(“cricket”);
vector.add(“hockey”);
vector.add(“football”);
vector.add(“tennish”);

// print vector
System.out.println(“Before swap Vector = “+vector);

/*
* Swaps the elements at the specified positions
* in the specified list. (If the specified
* positions are equal, invoking this method
* leaves the list unchanged.)
*/

Collections.swap(vector, 1, 3);

System.out.println(“After swap vector = “+vector);

}

}

Output:

Before swap Vector = [cricket, hockey, football, tennish]

After swap vector = [cricket, tennish, football, hockey]

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