array split newbie help needed

[bobhope]

Hi, I need some help. I have removed seperate add.member sections into one but want to be able to choose between whether student or teacher gets added and not have to input both. I assume I have to use a List Array but I have done a lot of reading and don't know where to start. Any help would be great, am very new to Java. Thanks.

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Committee
{
    private String name;
    private List<Object> members;

    public Committee (String name)
    {
        this.name = name;
        members = new ArrayList<Object>();
    }

    public void addMember(Student student, Teacher teacher)
    {
        members.add(student);
        members.add(teacher);
    }

    public void printMembership()
    {
        System.out.println("Membership of the "+name+" Committee ");
        Iterator<Object> it = members.iterator();
        while (it.hasNext()) {
            Object member = it.next();
            System.out.println(member);
        }
    }
}