Sizing Vectors : Vector « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Vector

The length is like the length of an array and is known as the size.

It represents the number of elements stored in the vector.

You retrieve this setting with the size() method and change it with the setSize() method.

public int size()
public void setSize(int newSize)

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);
  
    v.setSize(3);

    System.out.println(v);
  }
}

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