Swap element in a list

static void swap(List<?> list, int i, int j)
Swaps the elements at the specified positions in the specified list.

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

public class Main {
  public static void main(String[] args) {
    Vector<String> v = new Vector<String>();

    v.add("1");
    v.add("2");
    v.add("3");
    v.add("4");
    v.add("java2s.com");

    System.out.println(v);
    Collections.swap(v, 0, 4);
    System.out.println(v);
  }
}

The output: 


[1, 2, 3, 4, java2s.com]
[java2s.com, 2, 3, 4, 1]
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Collections:
  1. Collections
  2. Get empty collection from Collections
  3. Do binary search
  4. Copy value to a List
  5. Get Enumeration from collection, create list from Enumeration
  6. Fill a list
  7. Get the max and min value from a Collection
  8. Fill n Copy object to a list
  9. Replace value in a list
  10. Reverse a list
  11. Get comparator in reverse order
  12. Rotate and shuffle a list
  13. Create singleton
  14. Sort a list
  15. Swap element in a list
  16. Get a synchronized collection
  17. Return an unmodifiable view of collections