Vector: size()
/** *Output: Initial size: 0 Initial capacity: 3 First element: 1 Last element: 2 */ import java.util.Vector; public class MainClass { public static void main(String args[]) { // initial size is 3, increment is 2 Vector<Integer> v = new Vector<Integer>(3, 2); System.out.println("Initial size: " + v.size()); System.out.println("Initial capacity: " + v.capacity()); v.addElement(1); v.addElement(2); System.out.println("First element: " + v.firstElement()); System.out.println("Last element: " + v.lastElement()); if (v.contains(3)) System.out.println("Vector contains 3."); } }