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Monday, 25 May 2015

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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