Swap elements of Java Vector example
- /*
- Swap elements of Java Vector example
- This java example shows how to swap elements of Java Vector object using
- swap method of Collections class.
- */
- import java.util.Vector;
- import java.util.Collections;
- public class SwapElementsOfVectorExample {
- public static void main(String[] args) {
- //create a Vector object
- Vector v = new Vector();
- //Add elements to Vector
- v.add("1");
- v.add("2");
- v.add("3");
- v.add("4");
- v.add("5");
- System.out.println("Before swaping, Vector contains : " + v);
- /*
- To swap elements of Java Vector use,
- static void swap(List list, int firstElement, int secondElement)
- method of Collections class. Where firstElement is the index of first
- element to be swapped and secondElement is the index of the second element
- to be swapped.
- If the specified positions are equal, list remains unchanged.
- Please note that, this method can throw IndexOutOfBoundsException if
- any of the index values is not in range.
- */
- Collections.swap(v,0,4);
- System.out.println("After swaping, Vector contains : " + v);
- }
- }
- /*
- Output would be
- Before swaping, Vector contains : [1, 2, 3, 4, 5]
- After swaping, Vector contains : [5, 2, 3, 4, 1]
- */
