@Override public boolean hasNext() { if (next == null) { next = computeNext(); } return next != null; }
@Override public boolean hasNext() { if (next == null) { next = computeNext(); } return next != null; }
@Override public boolean hasNext() { if (next == null) { next = computeNext(); } return next != null; }
@Override public boolean hasNext() { if (next == null) { next = computeNext(); } return next != null; }