@Override
public boolean isEmpty() {
if (els.isEmpty() == true) {
return true;
}
return false;
}
@Override
public void clear() {
els.clear();
}
@Override
public void pop(Object element) {
els.pop(element);
}
@Override
public int length() {
els.length();
return 0;
}
@Override
public void push(Object element) {
els.push(element);
}