Na endlich sieht Java 8’s Optional-Typ besser aus

static <T> Optional<T>
empty()

Returns an empty Optional instance.

boolean
equals(Object obj)

Indicates whether some other object is "equal to" this Optional.

T
get()

If a value is present in this Optional, returns the value, otherwise throws NoSuchElementException.

int
hashCode()

Returns the hash code value of the present value, if any, or 0 (zero) if no value is present.

void
ifPresent(Consumer<? super T> consumer)

Have the specified consumer accept the value if a value is present, otherwise do nothing.

boolean
isPresent()

Return true if there is a value present, otherwise false.

static <T> Optional<T>
of(T value)

Return an Optional with the specified present value.

T
orElse(T other)

Return the value if present, otherwise return other.

T
orElseGet(Supplier<? extends T> other)

Return the value if present, otherwise invoke other and return the result of that invocation.

<X extends Throwable> T
orElseThrow(Supplier<? extends X> exceptionSupplier)

Return the contained value, if present, otherwise throw an exception to be created by the provided supplier.

Returns a non-empty string representation of this Optional suitable for debugging.

Was mir immer noch fehlt: fromNullable(v). Arg, das fehlt.

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