Java Optional if object is not null - returns the method result, if null - returns default value

Question

Is it possible to transform this code to a Java 8 Optional one-line expression?

long lastPollTime;
if (object != null) {
    lastPollTime = object.getTime();
         


        

Answer 1

long lastPollTime = Optional.ofNullable(object).map(o -> o.getTime()).orElse(0L);

Instead of o -> o.getTime() you could use a methods reference like ClassOfObject::getTime