The contains() method: reports if a specific element is within the vector : Vector « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Vector

import java.util.Vector;

public class MainClass {
  public static void main(String args[]) {
    Vector v = new Vector();
    v.add("A");
    v.add("B");

    boolean isContaining = v.contains("B");

    System.out.println(isContaining);
  }

}

true