3 ms·
public static void main (String[] args) { Optional<Boolean> n = Optional.ofNullable(null); Optional<Boolean> e = Optional.empty(); Syste
by shagie 8mo ago
public static void main (String[] args) {
Optional<Boolean> n = Optional.ofNullable(null);
Optional<Boolean> e = Optional.empty();
System.out.println(n.equals(e));
}
true
https://ideone.com/EGRdi5 https://ideone.com/EGRdi5
A null in an Optional is empty. So you've got:
Optional<Boolean> n = null;
Optional<Boolean> e = Optional.empty();
Optional<Boolean> t = Optional.of(Boolean.TRUE);
Optional<Boolean> f = Optional.of(Boolean.FALSE);
- nitnelave 8mo agoI guess I was missing the NPE: https://ideone.com/rp4Nvv https://ideone.com/rp4Nvv Optional.of(null) throws an NPE