public Key max() {
if (size == 0) {
return null;
} else {
Key maximum = list.getFirst();
for (Key p : list) {
if (p.compareTo(maximum) == 1) maximum = p;
}
return maximum;
}
}
public Key delMax() {
Key qurrentMax = list.pop(max);
size--;
max = this.max();
return qurrentMax;
}
public void insert(Key key) {
list.push(key);
size++;
max = this.max();
}