T - the value typepublic final class Optional<T>
extends java.lang.Object
| Modifier and Type | Method and Description |
|---|---|
static <T> Optional<T> |
empty() |
boolean |
equals(java.lang.Object obj) |
T |
get() |
int |
hashCode() |
boolean |
isPresent() |
static <T> Optional<T> |
of(T value) |
protected Optional(T value)
public static <T> Optional<T> empty()
public static <T> Optional<T> of(T value)
public boolean isPresent()
public T get()
public int hashCode()
hashCode in class java.lang.Objectpublic boolean equals(java.lang.Object obj)
equals in class java.lang.Object