public final class Optional<T> extends Object
static <T> Optional<T>
empty()
of(T value)
ofNullable(T value)
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public static <T> Optional<T> empty()
public static <T> Optional<T> of(T value)
public static <T> Optional<T> ofNullable(T value)