import java.io.*;
import java.util.*;

public class StudentList implements Serializable {

  // Vector holding our students
  Vector list = new Vector(6);

  // Default Constructor
  public StudentList() {
  }

  public void addStudent(String value) {

    // Add a String representing a student name
    if ( value != null ) {

      list.addElement(value);
    }
  }

  public void listStudents() {

    // Iterate over list vector, printint all Strings
    for ( int x = 0; x < list.size(); x++ ) {

      System.out.println("Student " + x + " : "
        + (String)list.elementAt(x));
    }
  }
}