public void clear() { _map.clear(); }
@Override
public String toString() {
// Overloaded to avoid auto-boxing
final LongIterator it = longIterator();
if (!it.hasNext()) {
return "[]";
}
final StringBuilder sb = new StringBuilder().append('[');
for (;;) {
sb.append(it.next());
if (!it.hasNext()) {
return sb.append(']').toString();
}
sb.append(", ");
}
}