public class Optional<T>
extends java.lang.Object
implements java.lang.Iterable<T>, java.io.Serializable
| Modifier and Type | Method and Description |
|---|---|
Optional<?> |
adapt() |
boolean |
equals(java.lang.Object obj) |
<R> Optional<R> |
flatMap(F1<? super T,? extends Optional<R>> f) |
T |
get() |
T |
getOrElse(F0<T> f) |
int |
hashCode() |
boolean |
isDefined() |
boolean |
isEmpty() |
java.util.Iterator<T> |
iterator() |
static <S> Optional<S> |
lift(S someOrNull) |
<R> Optional<R> |
map(F1<? super T,? extends R> f) |
static <N> Optional<N> |
none() |
T |
orNull() |
static <S> Optional<S> |
some(S some) |
java.util.List<T> |
toList() |
java.lang.String |
toString() |
public static <S> Optional<S> some(S some)
public static <S> Optional<S> lift(S someOrNull)
public static <N> Optional<N> none()
public T get()
public T orNull()
public boolean isDefined()
public boolean isEmpty()
public Optional<?> adapt()
public java.util.List<T> toList()
public java.util.Iterator<T> iterator()
iterator in interface java.lang.Iterable<T>public java.lang.String toString()
toString in class java.lang.Objectpublic int hashCode()
hashCode in class java.lang.Objectpublic boolean equals(java.lang.Object obj)
equals in class java.lang.Object