public class Optional<T>
extends java.lang.Object
Modifier and Type | Field and Description |
---|---|
private boolean |
abs |
private static Optional<?> |
EMPTY |
private T |
obj |
Modifier | Constructor and Description |
---|---|
private |
Optional() |
private |
Optional(T obj) |
Modifier and Type | Method and Description |
---|---|
static <T> Optional<T> |
empty() |
boolean |
equals(java.lang.Object obj) |
T |
get() |
boolean |
isPresent() |
static <T> Optional<T> |
of(T value) |
java.lang.String |
toString() |
private final T obj
private final boolean abs
private static final Optional<?> EMPTY
private Optional()
private Optional(T obj)
public static <T> Optional<T> empty()
public static <T> Optional<T> of(T value)
public T get()
public boolean isPresent()
public boolean equals(java.lang.Object obj)
equals
in class java.lang.Object
public java.lang.String toString()
toString
in class java.lang.Object