Checking for Collection Containment: containsAll() : Vector « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Vector

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");

    boolean isContaining = v2.containsAll(v);

    System.out.println(isContaining);
  }

}

true