Replacing Elements : Vector « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Vector

set() and setElementAt(): replace individual elements in an array

public Object set(int index, Object element)
public void setElementAt(Object obj, int index)

import java.util.Vector;

public class MainClass {
  public static void main(String args[]) {
    Vector v = new Vector(5);
    for (int i = 0; i < 10; i++) {
      v.add(0,i);
    }
    System.out.println(v);
  
    for (int i = 0; i < 10; i++) {
      v.set(i,"A");
    }

    System.out.println(v);
  }
}

[9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
[A, A, A, A, A, A, A, A, A, A]