public boolean contains(Object o) {
if (o instanceof People) {
return peopleTree.exist(((People) o).getName());
} else if (o instanceof Topic) {
return topicTree.exist(((Topic) o).getName());
}
return false;
}
public void addTopic(Topic i) {
topicTree.add(i.getName(), topics.getLength());
topics.add(i);
}
public void addPeople(People p) {
peopleTree.add(p.getName(), people.getLength());
people.add(p);
}
public People getMember(String name) {
int place = peopleTree.getValue(name);
return people.get(place);
}