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

public class Main {
   public static void main(String[] args) {
      Vector<String> v = new Vector();
      v.add("1");
      v.add("2");
      v.add("3");
      v.add("4");
      v.add("5");
      System.out.println(v);
      Collections.swap(v, 0, 4);
      System.out.println("After rotation");
      System.out.println(v);
   }
}

[1, 2, 3, 4, 5]
After rotation
[5, 2, 3, 4, 1]