import java.util.Vector;

/*
 *  Example of indexOf(Object o,int index) method. 
 */
public class VectorExample
{
    public static void main( String[] args )
    {
        Vector<Integer> vector = new Vector<Integer>();

        vector.add(10);
        vector.add(30);
        vector.add(30);
        vector.add(40);
        vector.add(30);
        vector.add(50);
        vector.add(30);

        System.out.println("vector  : " + vector + "\n");

        /*
         * Returns the index of the first occurrence of the specified element in
         * this vector, searching forwards from index, or returns -1 if the
         * element is not found.
         */

        int indexPosition = vector.indexOf(30, 3);

        System.out.println("indexPosition  : " + indexPosition + "\n");

    }
}