9. 47. 34. Checking for Collection Containment: containsAll()
public boolean containsAll(Collection c)
This method takes a Collection as its argument, (not necessarily) a Vector, and reports
if the elements of the collection are a subset of the vector's elements.
import java.util.Vector;
public class MainClass { public static void main(String args[]) {
Vector v = new Vector();
v.add("A");
v.add("B");
Vector v2 = new Vector();
v2.add("A");
v2.add("B");
v2.add("C");